Inverted Diagnosis! Mechanic in Denial! Chrysler 3.6 Pentastar

Рет қаралды 165,019

10 ай бұрын

Low Compression Follow Up! Chrysler Pentastar 3.6
• Low Compression Follow...
Misdiagnosis! Mechanic was Wrong! • Misdiagnosis! Mechanic...
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@RainmanRaysRepairs 10 ай бұрын

Follow Up Here, not looking good! Low Compression Follow Up! Chrysler Pentastar 3.6 kzfaq.info/get/bejne/r9qnpNhyqd2spI0.html

@user-gx9zm4bm6g 10 ай бұрын

As a last resort, try to de-carbon the valves and pistons by spraying a water mist onto the intake The steam will break loose carbon on the valves. Be careful how much you use because of hydro lock

@landontakeamericaback2106 10 ай бұрын

So you bought the Back to the future DeLoreon so you can go back to correct misdiagnosis of the steering shaft the other day?Let the adventure start.We need the sequel.

@hot_wheelz 10 ай бұрын

Gotta love the longer videos. I definitely prefer 45 minutes and over.

@ryulee458 10 ай бұрын

Exactly he needs to have longer videos

@FloodExterminator 10 ай бұрын

True but it also depends on his customer's needs as well! If the customer only needs minor stuff like an oil change or brake change, I'm still fine with shorter vids :P

@hot_wheelz 10 ай бұрын

@@ryulee458 while I certainly prefer the longer format, I'm also mindful that Ray is a mechanic who happens to run a successful KZfaq channel, as easy as it is for some people to forget, he is not a successful youtuber who just happens to also run a garage. As a result of this, the reality is and likely always will be that he can only film the jobs available at any given time and while I'm sure he tries to pick and choose the jobs that might be more interesting to his audience, the reality is that if all he has for a week straight is oil and brake disc changes and A/C jobs, then all he's got to choose between that week is a bunch of oil and brake disc changes and A/C jobs. I don't begrudge the shorter videos but I certainly enjoy the longer format when he has a job that allows for a longer video and I appreciate the extra work involved in filming and editing those bigger jobs that can take just as long to edit as they do to film in the first place.

@hot_wheelz 10 ай бұрын

@@FloodExterminator absolutely agree.

@DonsJunkmail-vg1wt 10 ай бұрын

@@FloodExterminatorlike changing windshield wipers...it's very educational.

@Recon_OB 10 ай бұрын

Hey Ray, Chrysler tech here, if you do end up doing a cylinder head. Take a straight edge to the block (it should not exceed 0.0025-0.0035") for some reason when the rear heads go bad, they allow the block to warp. If you catch it early enough you can get it machined. Chrysler says the head over cylinders 3 and 5 pulls away from the block. Probably not your issue but is worth checking while you're there, to potentially save them a ton of money down the road (if not caught early enough, coolant will pour in the cylinders and ruin the engine). It's very common on the 3.6L in my experience

@EricVonHunter 10 ай бұрын

I'll bet with the modern stuff that they put out you are very very busy man

@thes2kguy 10 ай бұрын

I think you were right. Did you see today's (Sept 22) video? Looks like cyl 3 hydrolocked and kaboom!

@SooSmokie 4 ай бұрын

Is this all pentastars? Or the ones they are using on the JL?

@Recon_OB 4 ай бұрын

As far as I've seen its all pentastars, but can be avoided by proper maintenance, don't overheat the engine and proper interval oil changes will help. Most of the failures I see are from neglect. As much as the owners want to say they maintain the engine. The damage to the engine doesn't lie and we as techs can see what really happened and the likely cause. I cannot stress enough, do NOT listen to FCA about their oil change intervals, if you are going longer than 5k miles (i don't care which oil you use) then you WILL have issues, also make sure you use the correct coolant and do NOT mix the autozone generic coolant with Mopar coolant as that will result in gel in the cooling system therefore overheating the engine. If you want to use the autozone generic coolant you WILL need to flush the system beforehand to avoid any issues as the Mopar coolant is known to have mixture issues already (FCA will not admit it). Other than that if you have a noise from the engine don't ignore it. I have one in the shop right now where the customer complained about a loss of power but apparently didn't notice the knocking from the engine. The engine is now completely done for and requires replacement as there was too much damage to rebuild@@SooSmokie

@SooSmokie 4 ай бұрын

@@Recon_OB Oh wow ok. I have been going to 8k normally, then started 15k with better synthetic. I use penzoil. I'll start at 5k now as I felt better about 5-7k instead if 10+. I only use the expensive chrysler stuff, and yes got the right stuff for my model. 2018 2dr rubicon, 55k miles on it now. She has treated me good so far except those calipers are garbage and always wanting to seize on me. Gotta re grease my brakes every year, about to have to tear apart me second and maybe third caliper on this. I may upgrade my calipers soon. But hey thanks for the info and the reply!

@scott.koopmann 10 ай бұрын

I just repaired one of these (3.6 pentastar) three months ago. It had damaged cams and rockers. All 4 cams and at least 6 rockers were damaged. Very common issue with the Pentastar 3.6 engine (youtube it). When the cam lobes wear enough, the cam duration and lift changes on that lobe, causing valve timing (and lift) to be off on that cylinder, resulting in compression issues. I would highly recommend that you pull the v/c's and inspect the cam lobes and the roller rockers, a.k.a. cam followers. The compression readings you were getting fit the symptoms of cam/rocker/lash adjuster problems. Inspect all, there are complete kits available for a reasonable price. The kits come with cams, followers, lash adjusters and required gaskets. There is a special tool kit needed for this repair, but the tool kit is cheap (less than $50).

@mod_incllc3235 10 ай бұрын

Techs nationwide have been reporting this on Direct-Hit.

@pilsplease7561 10 ай бұрын

Very uncommon next to never issue, Pentastars generally have minimal if any issues ever.

@dannylinc6247 10 ай бұрын

We had one I know, first this side, then after months later, that side. He drove it, talked about it alot, all he had to do. They(dealer) did initial work for failed parts at that time, then left him to fix the rest when it failed later. He had it all straightened out, drove it for months saying it was good now. While he sat idling, talking to me about another topic, it started missing . What a FPOS. 3.6L I believe. Not impressed with that build. Cam eater. And they told him it's customer pay pay pay.

@nychold 10 ай бұрын

I've seen enough of "Just Rolled In" to know that customers will lie about everything. "Customer states car stopped working after small bump." Whole undercarriage of car is missing and wheels are ground flat. 🤣

@61rampy65 10 ай бұрын

JRI should be required viewing for ALL car owners. It is just amazing what people will/won't do to their vehicles.

@turbocoltgt 10 ай бұрын

it always great to see a fellow technician going the extra mile to make sure the customer is taken care of!!!

@silicon212 10 ай бұрын

I had a similar situation with a 2017 Caravan, same cylinder. Turned out one of the exhaust rockers had failed, the camshaft spit it toward the valve, where it lodged that valve open. Thankfully it wasn't opened enough to cause a piston strike, but it was open enough to kill the compression on that cylinder. Cam wasn't damaged, so we put a new rocker on it. Issue resolved.

@mod_incllc3235 10 ай бұрын

According yo Direct-Hit this seems to be a common issue.

@silicon212 10 ай бұрын

@@mod_incllc3235 Indeed, seen a lot of that on DH.

@michaelray5595 10 ай бұрын

Ray you are freakin awesome! You did make some GUESTIMATIONS...not true diags, Then you verified your guesstimations. I wouldn't consider this "doing your job twice" but again verifying your findings. Kudos!

@newsnowriversidesgtrock8144 10 ай бұрын

Scientists call GUESTIMATIONS "hypothesis."

@LabCat 10 ай бұрын

Verify, Isolate, Repair and Test!

@SooSmokie 4 ай бұрын

That's literally how a real mechanic diagnoses a car and confirms the issue. Too many mechanics today are worthless as they only know how to hook up a computer and replace parts. Why Chrysler sent this to him.

@DocZoidberg549 10 ай бұрын

Ray do any of your customers see your videos of their car repairs.

@rexultimus1422 10 ай бұрын

Best automotive YT channel to date; I’ve learned a boat load from you Ray. I watch everyday kuz I literally learn something new everyday you post

@bobnoblesjr.465 10 ай бұрын

Another great video, Ray! Watching them is how I relax after work. Speaking of work, I haven't seen Troy or heard you talking to him. Does he still work there?

@TheCorpsehatch 10 ай бұрын

Good morning, Ray. Really like the update intro with the DeLorean.

@kevincurry4735 10 ай бұрын

Good morning Ray. Another great video on the way. Also everyone have yourself a great day.

@theheilious 9 ай бұрын

Mine is still running well. It's nice to have a disassembly vid. Thanks!!

@Dan_LTL_909 10 ай бұрын

yes, the test might have been repetitive, but much appreciated. defiantly great to see other way's of doing the test. I have never done so my self but glad tosee that way you did this one. THANKS

@jaxsonhugh9334 10 ай бұрын

None of those plugs look like they were recently replaced from what I could see

@Estes316 10 ай бұрын

I was thinking the same thing

@jilbertb 10 ай бұрын

Somebody didn't bother to change them, just the coils, and billed em anyways.... (not Ray!)

@Zippadeedoodaa-nt8om 19 сағат бұрын

How do you know?

@Shododaan 10 ай бұрын

I will say you freaked me out when you didn't block the intake runners during the disassembly of the injectors Ray. But... lots to learn from this video thanks for sharing it with us.

@ctackett51 10 ай бұрын

I went through literally the exact process on my 18 wrangler. Except it was an intermittent missfire on cylinder 2. Changed everything like you did on the cylinder. Still ended up needing a new left head...jeeps lucky it's got a cult following haha

@graken22 10 ай бұрын

I would take a 18' wrangler and gut out the drive train, engine, trans, AIR BAGS!, and throw the body on a 1984 CJ-7 chassis, 304 AMC motor,T4 manual twin stick 300 TC, Dana 30- Dana 80, lockers and then call it a Jeep! FYI just saying Chrysler bought the brand but since has NEVER EVER duplicated the JEEP product!

@williammc3183 10 ай бұрын

You are fixing all the problem vehicles in Tampa, apparently. Local shops get stumped, and you diagnose the problem. Nice ! However, it still a Chrysler, bruh...😂

@christopheranderson8275 9 ай бұрын

“My hose is too stiff” 😂 That’s usually not a problem!

@frankheiss5562 10 ай бұрын

very interesting ,,glad to see you make the effort to test n verify ,,thanks

@Cherrydamanokit 10 ай бұрын

yo ray I just watched a video and this guy was talking about you and said that you deserve more attention than you have and was saying a lot of good stuff about you. the channel is Tube Money Analytics. keep up the good work

@bobby9195 10 ай бұрын

Good morning Mr Ray hope y'all have a wonderful day, great video thanks for your information

@ginamiller6015 10 ай бұрын

Another thing that I like to do when investigating low compression is to use a leak-down tester. This helps you determine if it’s an intake valve or exhaust valve or rings. Awesome video thank you for sharing 🫶

@robertfarrar9411 10 ай бұрын

Curious to know what the oil is like. If that injector has been leaking for some time the oil may be diluted to the point of reducing compression.

@johncunningham4820 10 ай бұрын

If it was THAT diluted I think the Engine would seize .

@Boodieman72 10 ай бұрын

Happened to my Audi and the rings are stuck in the compressed state :(. The dealer wants to put an engine in but maybe BG EPR + MOA can help, anyway it's a lot cheaper than an engine.

@d4rkpho3n1x 10 ай бұрын

😊

@garynewell6947 10 ай бұрын

another epic video Ray your the best but the most important thing is to have your self a great day Ray

@jimgillikin3217 10 ай бұрын

I had a similar issue on a Jeep. Miss fire on number 3. I ran very heavy fuel injection cleaner. That solved the issue. Took about a week. These engines are known to have heavy carbon build up. Been good for the past 25,000 miles.

@justindaniels17 10 ай бұрын

Which fuel injector cleaner did you use?

@jimgillikin3217 10 ай бұрын

2 bottles of STP fuel injection cleaner(in the black bottle) per tank to clear misfire. I also run mystery oil in the gas once a month to reduce carbon build up.

@justindaniels17 10 ай бұрын

@@jimgillikin3217 I was thinking of trying 3 bottles with a just a 1/8 tank to clean the injectors to maybe resolve high fuel consumption I'm having lately

@roberttexas3618 10 ай бұрын

I really enjoy your diagnostic process

@ron1584 10 ай бұрын

Great diagnosis, it's nice to see you taking time to properly diagnose the engine problem. I wonder if there is carbon holding the rings in the ring lands? Maby a intake and combustion chamber cleaning is in order, then another check of the compression to see if the compression comes back. Another subject off topic does the tow truck have a hitch that will tow your enclosed trailer? By the looks of Hurricane Lee, I think you should prepare to head north if it is going to come ashore anywhere close to you. It is predicted to be a category 5 Hurricane. I hope it turns and heads out to sea and misses Florida altogether.

@Nocturnal2010 10 ай бұрын

It's still cool af you got your own shop bro. I still remember the drama. Keep up the good workage lol 👍🏾👍🏾👍🏾

@edzimdahl1158 10 ай бұрын

Have noticed sometimes people get cylinder 1 mixed up on on front wheel drive vehicles, usually because they assume number 1 is still on drivers side end of engine

@cranefly23 10 ай бұрын

That truly was “a very good video”! Fascinating stuff.

@tomjohntig 10 ай бұрын

Good afternoon Ray looking forward to this one. Tom. UK

@johnramsden2464 10 ай бұрын

I once had a similar issue on cold starts in a Toyota, turned out to be a fine crack in the head which rectified itself when at operating temperature.

@sparkplug1018 10 ай бұрын

For cleaning valves a trick I got from another mechanic that works really well is to take some zip ties, cut the big end off and tape them together. Then put that in a drill. Put some cleaner in the runner and twirl the zip ties around inside. Works wonders to break that crap up

@Salty_kreol 10 ай бұрын

I would run an intake clean spray such as Subaru top end cleaner if available in the states to see if I clears up all that carbon and restores some comp on cylinder3. The Subaru spray works wonders. Make sure it’s done outside though

@h2o100c 10 ай бұрын

Good video Ray!

@jessewynne8193 10 ай бұрын

I always check to make sure the said done things were done and re-diagnose Some times it just a stupid thing like after work was done the code wasn’t cleared and so it will still act up until it’s cleared on its own or manually

@mykofreder1682 10 ай бұрын

Will eventually do plugs and maybe coils why I'm there in Promaster self-made camper by 80-90K. Know you have to tear apart intake and hard to reach stuff in the rear, nice to see it done with all the plastic. Bought the van with codes reset on a bad coil that revealed itself on the trip home, the used car dealer replaced it, it only acted up when it got warm on a warm day and bought it in the spring with temps during short test drives in the 50s.

@jamesjohnson8824 10 ай бұрын

I experienced a once in a career situation concerning a low compression misfire. Compression in one cylinder very low. Added oil for wet test and compression normal. Typical indication of ring or cylinder wall issue. However miss was completely gone when engine restarted. Must have been carbon starting to build up on valve seat that was washed off from the oil.

@Aurora22586 10 ай бұрын

I would have started with the picoscope to check the amp draw as it cranked. As this would have quickly ruled out if it was bad compression as a cause

@mod_incllc3235 10 ай бұрын

Ray doesn't use am oscilloscope yet. His diagnostic skills will shoot to the moon once he does! I have to think the reason for no scope is because most of the places he used to work were always pushing for fast fixes. The kind of thing very common with flat rate shops. Now he can take his time and become a more complete diagnostician.

@Aurora22586 10 ай бұрын

@@mod_incllc3235 I don't see why this wouldn't be the fastest way, with one test he would have tested every single cylinder all at once, to see if anything was off

@rickcorbus1 10 ай бұрын

There is an extended factory warranty for that cylinder head 120000 miles.

@jdub976 10 ай бұрын

My brother in law has one of these Pacificlickers. Known issue with rockers and cams. Told him to get it in before bad things start happening.

@uninhabitedspace 10 ай бұрын

Something to watch on my way to work.

@kenthomann8047 10 ай бұрын

Ray, your trouble shooting skills are amazing!

@Grumpy-sy7wr 10 ай бұрын

My Neon started running real rough on my way home not long ago. Watched the fuel gauge physically moving for the rest of the 15 mile highway trip. Over a quarter tank for that distance. Guess what I found? A fuel injector leaking, so bad, I could blow through it with little restriction. Went almost normal at full throttle, with the extra air flowing in though 😂

@twanvandeluijtgaarden1082 10 ай бұрын

There is a boroscope you can get that has upwards facing cameras, which means you can see the valves and if they are damaged without having to remove the valve cover.

@chrisopherholmes5596 10 ай бұрын

I love longer videos you learn more about what's wrong and how to fix

@electrake2063 10 ай бұрын

@14:40, I would have Moved #3 coil AND plug to #5 spot. I’ve had plugs go bad internally and I would have wanted to know if either item was bad. I also would have done a resistance check on both coils to ground to see if they measure the same prior to reassembly.

@markanderson2904 10 ай бұрын

He did move both plug and coil.

@stevegray3287 10 ай бұрын

Loving the videos and wish you lived up the road from me here in england😂

@stevo4649 10 ай бұрын

thankyou Ray,,another excellent upload,,👍👍

@rmproute66 10 ай бұрын

Gotta love that TIPM Module (fuse box)!

@rogerfleury3591 10 ай бұрын

104th! GOOD THURSDAY MORNING RAY AND THE WIFE UNIT! And happy day after HUMPDAY to the two new employees! Roger in Pierre South Dakota

@Liquid_Plasma 10 ай бұрын

10:22 "THERES OUR COIL" LOL WORDS... FAIL.. GRAVITY!!!

@Flies2FLL 10 ай бұрын

Stellantis = Trash. Great video, as always!

@jilbertb 10 ай бұрын

Pentastar = evil pentagram

@williamduhamel7726 10 ай бұрын

My Brother in laws Torrent has a misfire on cylinder 1 at startup. I fired the parts cannon at it with changing the coil, wire, and pcv hose since it was broken. Flushed the system with seafoam. Now it just misfires at startup but goes away.

@jilbertb 10 ай бұрын

That borascope is like watching a signoidoscopy! 😂

@kevinyancey958 10 ай бұрын

You're customer was in denial when he thought that Chrysler was a good purchase!

@Heafalore 9 ай бұрын

i too enjoy a good denial phase when i find low compression

@dalejones3862 10 ай бұрын

Nice work ray as always

@user-ro6xx1yl3c 10 ай бұрын

As soon as you start the engine, there is still the added oil to the cylinder number three that is sealing the piston ring. You will continue to have a higher compression pressure until the added oil is burned off.

@normanphilo2915 10 ай бұрын

I boots say Ray, I never would have tackled some of the repairs on my vehicles if it wasn't for your videos. I've been watching you for a while now. And I gotta say if it wasn't for your teachings, I would never have been able to rebuild the brake system on my sons truck or the full suspension rebuild on my own truck. I always saw it as a scary projects that I was always afraid of. But watching you has given me more confidence in myself to realize that it is like an onion and all I had to do was slow down, think it through and everything will work out fine. It turns out now that all those big projects are really not that big. Sure it took me four days to redo the suspension on my truck, but I'm also fifty with health issues. Being disabled tends to slow things down, but I can't afford a pro machanic. Plus I don't have a lift either, so all my work is done with floor jacks and sitting on the floor. But, thanks ray for all your inspiration. It's making me into a better machanic.

@DCtaping 10 ай бұрын

Call your cupboard the liquid Locker🤔🤣👍👍😎🇨🇦

@realmccoy7503 10 ай бұрын

Great video McFly somehow it al will seem familiair to you with all that timetravelling.

@shark70007000 10 ай бұрын

I put a paper towel in the holes, so I don't drop anything into those holes. I posted that before you finally did that, when you were cleaning that #3. LOL I recently found that those seals can get pulled sideways, or rolled, from putting the manifold in place. So I now lube the seals a little, before putting the manifold in place, so the seal doesn't get folded over, then leak later. Wish you were local to me, but I'm in commifornia. I have a question about a nissan 2.5. I think it's the cat, though.

@michaelstoliker971 10 ай бұрын

I have the same compression tester and it does the same thing. I go through schrader valves like crazy.

@rossgee2950 10 ай бұрын

Ditto

@AntonioClaudioMichael 10 ай бұрын

Them intake runners are bad wow 41:20 them chucks are huge @Rainman Ray's Repairs

@michaeldamian5140 10 ай бұрын

Ray, as I understand it, a valid compression test requires that all spark plugs be removed and the throttle plate propped open. Restrictions on the incoming air can contribute to low compression readings.

@h2o100c 10 ай бұрын

Notice. He did a comparison check so you’re opinion is not valid.

@john_thorpe 10 ай бұрын

Wonder if he was able to retrieve that bolt that was hanging out down there before he put everything back on?? I'm up to 44:12 and no mention if he did or not, just going to try with a magnet.

@jcadult101 10 ай бұрын

16:50 ChuckE2009 stood the cases on end like a book rack and wrote what's inside in marker on the edge making it easer to grab, less likely to drag a bunch of stuff to the floor.

@felderup 10 ай бұрын

for a second there, it sounded like you were rambling to that guantanamera song.

@John-dp3ln 10 ай бұрын

Get a depsech camera with side view. Can see valves and cylinder walls.

@billrobertson9370 10 ай бұрын

Thats why I run a catch can on my 3.6 liter. To keep the intake runners clean. 😮

@MrRunner 10 ай бұрын

May I ? The correct method of doing a wet/dry compression test is to remove ALL spark plugs, hold the throttle body valve open, insert the tester in #1 and crank it. Record the result and repeat for the remaining cylinders. Put a squirt of oil in #1 and record the pressure. Repeat for remaining cylinders. If you don't do this you will have erroneous readings as you are pulling a vacuum on the intake. Compare the pressures. These should be the CR (compression ratio) x 14.2 (one atmosphere). They should agree within 10%. If a dry < wet, it's a valve related problem, if wet > dry, it's rings. You were 100% correct to suspect a Comp. Test error and replace an injector as these things are infamous for failure. Because it's a Chrysler, I'd have done ALL plugs coils and injectors, but many customers won't spring for that I understand.

@imfloridano5448 10 ай бұрын

That compression is unusually low Ray, a yourube channel called The Online Mechanic deals with that 3.6 pentastar. Most common issues is the rocker arms causing the lower compressions or the variable cam phasors sticking from the solenoids being gunked up. I noticed same low compression across each cylinder

@mod_incllc3235 10 ай бұрын

I hope Ray reads these comments or checks out Service Data or Intellifix before calling this fixed. Ray what's the deal with the 'Off-duty promotion?

@aaronkoivu 10 ай бұрын

Chrysler tech line only uses a cylinder leak down test on compression test

@ricebike 10 ай бұрын

Hmm, I thought you lubricate the new fuel injector with some engine oil or similar before installation Nice process of cleaning out some of the carbon buildup of the intake valves with brake cleaner and air blasts

@davidrush8283 10 ай бұрын

White paint marker on front of your boxes with tools marked would help others know what is in what box.

@crazygeorgelincoln 10 ай бұрын

Misfires when cold, here's a blanket

@Gorilazz. 10 ай бұрын

Man I wish you were in my state! I have a oil leak and nobody wants to work on it and i like my car and don’t want to get rid of it.

@catherinemorgan2741 10 ай бұрын

Never mind, you got it

@1DarkStorm 10 ай бұрын

Welcoming back!

@lanebode8526 10 ай бұрын

I was always taught that when you do a compression test, you should have all the spark plugs out and the throttle plate, wide-open and crank for three seconds. But I’m sure that engine is shot anyways

@deplorablelibertarian 9 ай бұрын

So what caused the injury to the engine…getting too hot, and running hot? Or is it just because it’s a Pentastar?

@bobbg9041 10 ай бұрын

17:56 you should put a chemical warning placard on the bathroom door like bio hazard or enter at own risk.

@calvinevans8305 10 ай бұрын

18:42 you accidentally pulled the compression relay out. Lol

@JamesGarmanrabbitjetta 10 ай бұрын

One thing on the CDJR vehicles you should be able to hold the throttle down 100% and allow cranking.

@aaronkoivu 10 ай бұрын

Clear flood mode…k car had it

@ryulee458 10 ай бұрын

Well good morning Ray 🌄

@Toadyru 10 ай бұрын

20:15 the portable light wanted to inspect the situation further by moving deeper into the engine.......

@VishalPatel-ge3nv 10 ай бұрын

Finally a long video.

@larryl43 10 ай бұрын

thank you

@geez70 10 ай бұрын

Great videos and an even better mechanic.. You must let us hear the goofy phone ringer again!!!!

@suburban404 10 ай бұрын

😂

@DocZoidberg549 10 ай бұрын

I had come back and watch this again since this engine tried to disassemble itself.

@job38four10 10 ай бұрын

I notice excessive manual ratcheting going on in wide open spaces, it caused me to have mis-fires also............

@petej.8676 10 ай бұрын

The best things are wotth waiting for.✌️

@Bryanja81 10 ай бұрын

Ray, I'm working on swapping out a 5.3 because of a bad injector. Stuck open while the truck sat overnight, piston was at the bottom of the compression stroke and the cylinder filled with raw fuel. He went to start it the next morning and bang. New engine. Bend the rod, damaged the piston. So if the injector in that Pacifica was bad, it's possible it hurt a valve or piston.

@justindaniels17 10 ай бұрын

Was it the 5.3 vortec that bent a rod?

@aperson9495 10 ай бұрын

I wonder if the newer Chrysler vehicles have a compression test function like the newer GMs - my wife's '15 Malibu has it and using GDS2, you can command a compression test were it'll shut down spark and fuel and crank the engine for a specific length of time. Works really well IMO.

@mitchharris97 10 ай бұрын

I’ve heard of you hold the throttle pined they will do that never actually verified it though I also wondered if it could show low if the throttle body is restricting air to make compression

@aperson9495 10 ай бұрын

@mitchharris97 Well, technically, you're supposed to hold the throttle down to open the throttlebody when doing a compression test, which I don't think was done here, but because it was the same for all three cylinders tested, I would say it doesn't invalidate the results (and to be honest, pretty much every time I've done a compression test, I've forgotten that part). The good cylinders did seem to build up pressure kind of slowly, but they got there, whereas #3 did not. The specs I've seen typically say no cylinder should be less than 100PSI and the variation between the highest and lowest should be no more than 10%. Re-running the test with the TB wide open MIGHT increase the compression numbers, but even if it did, I suspect #3 would still fail on the no more than 10% variation spec if it did manage to get over 100PSI. There definitely seems to be something wrong with #3, and since there was no meaningful improvement after Ray put some oil in the cylinder, I'd say the issue is in the head, or MAYBE the head gasket.

@nickmcminn2137 10 ай бұрын

Not sure if you know but a regular tire Schrader valve will give a lower reading than the kind ment for a compression tester. Those are lower tension valves

@jonalowe 10 ай бұрын

Correct. Standard tire Schrader will give much lower readings. A comparison by feel of how hard it is to compress the springs in each will demonstrate the difference.