I just had the exact thing happen on the exact same valve. I took the water pump and timing plate off and found damage from tap water. All the work I have done and about to do is because of your help.

That explains my vacuum loss I was chasing (back pressure). We're gonna save this one. You're right to the point great video, new sub

I suspected this on my Durango and sure enough your video shows the exact valve I thought was stuck open on mine. I guess im replacing the head.

Martin you are o e person who I trust most,because I can see you love jeep wj not like most people and you give lots of value information. Please keep going

Thanks for the warning. Own an XJ 4.0. Seems to be Bulletproof. If i ever decide to upgrade to a used Grand Cherokee i will find one with a 4.0

Hey Martin, I jut discovered this today, same Cylinder #2 in my 4,7 (non-HO) Exactly same issue, was lucky it dropped into a cavern and not breaking any studs or castings. Thank you for posting great content. Hi all the way form South Africa!♥

went to junk yard today and grabbed my driver side cam today hope to get my jeep up and running tomorrow. 7-13-24 I appreciate all your content Martin, since Ive already gotten the engine down to the heads there is no other way to check the valve seats so Im gonna go ahead and take the head off?

Try a hammer and brass punch. Just tap the end of the valve stem. Just a thought, may or may not work .

Hello friend, I would like to know if you found the problem because the valve is shod, I have a Cherokee 3.7 with the same problem, thanks 🙏🏻

1 of my rockers does not fit on tightly.? I did find 1ofmyrockerstodecidealso. What does this mean. What should I do

hi i am rebuilding my jeep 4.7 engine I live in Italy, here it is hard to find the pieces, but fortunately thanks to ebay I have them sent from the USA, is there a way to prevent the drop valve?

Vance here. 05 dodge ram 1500 4.7 When I took my valve cover off, the rocker arm popped off, the lifter or lash was bad so I replaced it. Put rocker arm back on without pry bar, just snapped on and snap off. Truck don't run too bad without the rocker arm..can you explain to me about the washers under the lifter situation? So I can drive normal

I just bought a used jeep commander 4.7L. They said blown head gasket, which just turned out to be 2 rockers fallen out when I took valve covers off

That was not a fulcrum it was a rocker arm the fulcrum is found on a rocker stud that the rocker pivits on, how much better are HO Cams and how do you know an HO Motor?

This just happened two weeks ago on my 3.7L (basically the same just two less cylinders). Cost between $1800-2200 (depending on shop labor rates)

Help!! I have a 99 myself that is failing because of burning oil issue. Anyone have any suggestions as I am just doing the best I know how to hold it together long enough to decide what to do?? I was thinking of just biting the bullet, yanking out the factory 4.7 and putting a Monster built 4.7 which has all upgraded internals inside. Monster can also custom build engines just like they do with their Transmissions. Any help or suggestions welcome. I got a Monster Transmission in December to replace the terrible Factory designed one. Night and day difference in power delivery and MPG.

Martin can you add the h.o heads or do you need too tune it

so whats the fix for this new head?

2002 ram 1500 4.7l Just found rocker laid out like this, but the valve moves properly. So just put new lifter.. hopefully it fixed it.

Hi Martin quick question, I recently picked up a 06 Grand Cherokee 4.7. Currently has one misfire in Cyl 7, I have replace all plugs/gapped correctly, replaced all coil packs. Ensured injectors are all working. Also have tested to ensure the proper voltage is going to the coil packs/injectors. I do have a slight ticking/knocking sound shortly after starting the car and once slightly revving or driving you can hear this ticking/knocking speed up. I am leaning towards taking the driver side valve cover to see if it is a rocker/lifter issue. Do you think if one of those were to fail it would causing this noise/misfire before I attempt to take the cover of to inspect? Also replaced the EGR valve. My final step after I remove this valve cover is to test compression in Cyl 7. Thanks!

Hi Martin, thanks for the fantastic videos! I just bought a very clean 2004 WJ with 4.7 non-O.H. with 146,000 miles and it runs good. Would you recommend that I replace the lifters so I don't have problems? Thx

I just checked my '02 H.O. and it seems like this is my issue. I can place the rocker by hand and can pull the tip of the valve up and down with no resistance. My lifter seems just fine (doesn't compress at all). I purchase the vehicle last year from a dealership with a two year warranty at 128k miles. Hopefully it won't be a battle to cover this fix.

How my '02 died. You'll know when it happens. I drove it all day that day, no problems. Parked, and went back to start it to go get some ice cream and it was awful. Whole thing shaking, black smoke and all. I had the trans rebuilt, new PCM, new battery and good tires. Engine rebuild was to much for me, I really miss that vehicle.

Grand Cherokee Laredo 4.7 2000 - After replacing radiator, passing checks then doing deeper diagnose- Turns out (constant P0307) after extreme overheat situation, cylinder #7 compression is 30PSi and doesn't climb after reset gauge. Compared to others (80's+ PSI). Don't see off the bat any effect on radiator fluid (cap off) while running, no bubbles or overflow (doing it solo). However, spark plug has tar like buildup within 20miles. At this point; assume either Cylinder O-ring is bad or head cracked when overheated. Can I pull the head without major hassle? Should I. Gasket seal is a scary thing. Trade in time? What are your thoughts? Thanks.

Sig... Martinbuilt..or redone do the engine completely. To my Grand Cherokee 4.7 v8. The starter motor...but does not enter the bike. Home never?? No One for now has not haprened nothing. l'm worried. Excuse me if had mails l wrote then

I'm having this same issue on a 4.7 Durango I'm working on right now. It was a misfire on cyl 8. I took valve cover off and fulcrum was laying on the head. Put it back in, and just like this video, it was way too easy to go back on. I really didnt want to replace the head. I'm gonna try to tap on it tommorow and see what happens

Hey Martin, just can across your channel and was wondering if you could possibly help me on my random misfire 2005 Grand Cherokee WK. It has the same 4.7 as your WJ I believe, but mine is definitely a tricky one. The code I pull is P0300, which is random misfire. When I did pull codes for a single cylinder, it was for 2,4 but hadn’t popped up since I did the plugs, new 02 sensors, fuel pump. I have also tried swapping injectors to opposite side, moved coils around, and I can’t seem to narrow down this issue. Compression is above 165+ in all cylinders. Fuel pressure is 60 +-2. It misfires heavy, while driving and pushing the gas down. When it idles it doesn’t sound the worst. But as soon as I try to pick up in speed, she sputters and struggles like no other. Thanks!

I have question I was trying to removing the value cover today and I noticed the hole where I need a lifter was broken? Can someone tell me how bad is it

My number 8 misfired. When I looked at it the Fulcrum was off. Couldnt tell if the valve seat was bad or not. Looked like the lifter was stuck up . . . Probably the issue.

Hi Martin I have a 2012 ram 1500 4.7l and at long idles I'll get blue smoke like oil burning. Mt question is, would that be a valve seal or rings

Hi Martin, love these videos! I'm having a used 4.7 installed in an otherwise mint '04 GC with the HO. The "new" motor has 80K on it. I intend to do the rocker/lifter swap before installing (much better access!) but this valve seat drop has me concerned. Is there a mileage window where this seems to occur more often?

I got a 06 Grand Jeep Cherokee Laredo I left the dipstick out and I can't see the hole do you know where the location of the hole is on a 4.7 l Jeep thank you

Hi martin, i need to ask you a quite urgent question. I have a 2013 4.7L in my Lonestar 1500. A few days back, i took it out for a drive, noticed that the ticking that’s been there for a few years sounded a little different but it went away once the engine got warm. Drove it around 60ish miles, beat on it a bit, by the time i got back home it was idling just fine with no issues or ticks. That’s what this engine has done for several years. Day later, i go to crank it up, and it’s ticking so loud it sounds like a rod knock. This time it doesn’t get better with temp, and stays bad. I can tell it’s not rod knock though as the engine runs as smooth as butter just with the very loud tick. I thought it was coming from the drivers side head so i cracked off that valve cover, removed all the lifters/rockers, everything was fine. Lifters were in great shape with no play or anything. There is/was a distinct tick when it cranks over in flood mode now, before it was normal while cranking in flood. Removed the timing chain cover to see if I could find anything. Drivers side tensioner was a little loose, nothing too major, same with the passenger side. Cranked it over for around 5 seconds and both firmed right up where they were supposed to be and i am unable to move either tensioner by hand. I haven’t been able to get the passenger side valve cover off yet as it’s a pita to do, but i plan on getting it off within the next few days. I should also mention, when i had the valve cover off of the passenger side with the lifters/rockers removed, i cranked over the engine, the the tick was still there loud and proud. I’d like to know your thoughts. The engine runs smooth as possible, i can provide a video if you want.

I think my 05 Durango might be having that problem. I have random cylinder misfire, originating from cylinder 7 & 8. Thing has to warm up before it can atleast ok, if I run it cold it hesitates really bad and almost dies out. It also billows white smoke when I gas it alittle. I already replaced coil packs and spark plugs to see if fixed the miss an it obviously didn’t.

Could you expand a bit more on how you haven't heard of this happening in 2008 or later engines? I have a 2008 Grand Cherokee with the 4.7L. It had a leaky heater core (that I have since replaced) and was overheating due to the thermostat being put in backwards. I have been running without the thermostat in, and no overheating, but it does seem like the engine is not as powerful since before overheating. Do you think this could be the beginning of a valve drop issue?

I'm just curious why do you like the HO 4.7 so much. I'm not a jeep guy or even a truck guy but I work on everything. I just came across your channel and both videos had 4.7 some how lol

I have a 2001 4.7 on a darango it dumpstoo much has on cylinder 5 and floods it out could the valve seat be the reason.

How can you fix this problem can I just rebuild the motor or can I just get new heads or should I just rebuild the heads or should I just change the motor I really need to know

Thank you

I am having this issue now exact same problem to fix it all i have to do is get a new head? or how do i fix

I have a 2002 Dodge Ram with the 4.7L. My engine did the exact same thing on the exact same valve.

martin what does your 4.7l oil pressure read? mine stays at 48psi on my tuner and instrument cluster it stays just after halfway mark.

I know this is old, but I bought a 2000 Dakota 4.7L and had it for about two and a half years now. Took real good care of it and all of that but it managed to drop a seat. My question is this. I went to the scrap yard and pulled the head off of a 2002 and I used my cams and springs and all that. Did Dodge ever correct that problem in the later years of the 4.7? Because I'm wondering if this is a problem that I should be looking out for with a slightly newer head.

I just got my passenger side head because a dropped seat. Caused I am sure by a radiator leak there is a few marks on top the piston. I may end up replacing the piston I am planning to change the oil pump so I will have the pan off.

Dear Martin hope you are fine. i have the same problem can you please chare what i have to do to fix it. most regards

I own a 04 grand Cherokee overland with the 4.7 HO. Engine has been relatively good. It's got 130000 on it now. Should I be concerned... ?

Is the motor basically trashed? Just opened mine and found the same thing on 5. Can I replace the valve myself and do you have a video?

The problem is the lifter is not getting enough oil to the lifter for some reason. I think either they have a hot spot in the oil channels and bakes the oil in that spot or they are too small and clogging. I did this to 4 motors after trying new lifter that did the same thing stop working. Take the lifter out, crank the motor over a couple times but don't start it. Oil will shoot out and so will the clog in the oil channel. Not saying it's the answer for everyone but it worked for me four out of four times.

Found a 2008 Dodge Dakota with a 4.7 V8, Will the engine swap into a 2004 Dakota. I was going to use the 2004 harness and PCU and swap the throttle body to the 75mm LS1. Will it work? I understand the the 2008 model motor fixed the valve seat other common problems of the 4.7. Is this swap worth doing?

I have a Ram 3.7 with a valve seat issue...causes a PO300 /304/306 random misfire at idle....on the road its fine

I think what's happening when the valve seat drops is due to an overheating issue and the head being aluminum expands just a little bit and the seat can drop down due to the pressure no longer holding it in. Being pressed in; this tension is what's holding it in.... The ONLY way it could come out of from heat expanding expanding the socket. I believe it got hot from the hydraulic fan not engaging and causing it to get hot. That's the only thing I can think of. Martin... Your thoughts?

Help. 02 4.7 dodge replaced lifters and timings chains guides and adjuster runs strong but still has a constant knock?

Can the head be repaired? So the valve seat drops out and blocks the valve's return?

For Europe and other parts of the world, the 2.7 CRD Mercedes engine is far the best choice for grand cherokee WJ!

Would that cause blue smoke to come out the tailpipe? I have an 03 Jeep Grand Cherokee Overland and it is smokes every time I step on the gas. Great videos btw!

hey martin i have a 2000 dodge dakota 4.7 litre it has 160,000 miles and im gonna change the lifters should i run jillcat proline engine conditioner to remove sludge be for the new parts go in ?any suggestions would be appreciated thank you

Have this issue right now on my 2004 jeep V8 HO, do you know if the cylinder head can be removed without taking the front timing cover off? I've heard it can be done with wedging the timing chain in place but can't find any good videos on it.

do they make a roller lifter for the 2000 4.7 fakota?

Having this issue with my 06 WK. Short of a head or engine replacement, anyone have a fix or solution to this?

So would you say the 4.7 is problematic as an engine ?

So how do you fix that problem when it happens

Gotta dead cylinder 2 valve seat dropped and cracked

Which cylinder seat drop is most common?

Sounds like the source of the notorious (motorious) "Hemi tap." 😢

Anyone know the height spec overall on a new lash adjuster? My valve moves fine (no knock when it's running either) but the rocker was just laying in my head on the same cylinder as this & it's super easy to put back, just like this one is...my lash adjuster doesn't appear to be collapsed either but id say there's 1/4" of play when the lobe is up. (just measured from bottom of lifter to top of "tit" is exactly 2")

I fixed that problem long time ago, I know how to fix that so it wont do it again.,just open cathalic converter and your valves will never drop again, it took me about 7 years to learn that, and I have bunch of happy customers.

Happens on the 5.7 too

I've never had any problems with my 4.7. I guess I just maintain my engine better than most people.

Great video thank you so much Mark mangano dependable auto wartburg tennessee

Hey Martin are you in Atlanta pull a part?

No way to fix this issue? I think this isnl whats wrong with my truck.

My names hugh...you know anything about unlocking a dodge ram motor that over heated a little...motor locked after It was drove it to pep Boys after they looked at it.. pep boys returned the vehicle locked up.. i changed the water pump and thermostat...I'm trying to think we're to start next...tried spinning it...locked... .

How do u clean them cams up

Your like 👍 and a new subscriber thank you sir

These engines like proper maintenance or they will teach you a lesson. If the engines overheat there is good chance the valve seat on one of the valves will displace. If not that a lifter will go bad from infrequent oil changes.

Does the 2008 heads fit on a 2004? Are they compatible like that? If so would I have to swap out both heads? I think this is what is wrong with mine 2004. Same valve same cylinder. :(

Is there a recall ?

💯🔥🔥

So you basically just told me my motor is fuxed? I’m 99% sure this is what happens

Dodge/Chrysler .7 anything can't be worth repairing when ALL their valve seats eventually drop and destroy the engine 😮

im looking at a 00' with 230k on it. Burning oil at the moment. Either rings or the valve seal on the left head. How much of a pain would this be to service ?

U CANNOT RUN THESE THINGS HOT. PERIOD!!

People pull their first valve cover and start making KZfaq videos