C4 Corvette Running Hot? Simple DIY Mod to fix!! $25 Bucks

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C4 Corvette Running Hot? Simple DIY Mod to fix!! $25 Bucks

Рет қаралды 27,846

Күн бұрын

I’m new to the C4 Bette world, and was astounded by the temp these things run! This is a 1989, with the TPI L98 engine. This simple 25 buck mod, is helping this hotrod stay cool! Easy enough! First run and test, this thing is working awesome and not getting near the temp it was before. I'll update you guys over the next few months, but I think this is a real solution and is gonna work great.

Пікірлер: 106

@goldcoastslim2117 25 күн бұрын

i made mine to run the main fan whenever the engine is running, made all the difference in the world. no more over heating or boiling over - runs at about 179-185 on a very hot summer day now

@izayyahh2144 5 күн бұрын

How did you do that? Mine runs 205-230 on a hot day

@petercermak4095 21 күн бұрын

I upgraded to a wild Stroker engine and found my engine racing to 250 degrees in traffic. Here was my solution on my 87: new fan relays, fresh grounding, new front air dams, 160 degree Tstat, 3 core champion radiator, hood vents, and tuning the FiTech fans to turns on and off between 165 and 180, slighly staggered. Now in 100 degrees with a/c it will hold at 170 cruising and 190 in park. I consider anything over 200 too much. Txs for the vid, very good for stock engines.

@BLkDEATHBlaDe28 4 ай бұрын

Thank you so much John this works for my 88 Corvette. I’ve been driving it stop and go traffic downtown on the freeway and lol things keep going on at 185 and turn off at 173. My car used to go up to 230 and I hated the heat like smell.

@mariocooldude9092 5 ай бұрын

I spliced in a toggle switch so I can turn the fans on at any temp

@strokermaverick Жыл бұрын

Good deal, T.J.! Your son, is going to LOVE it! I, used to put a 160 degree thermostat, in all my hottish carbureted stuff.😀 I thought, I was doing something. I, know fuel injected stuff, is different.

@JudgeMeNotLeMans Жыл бұрын

Nicely done. If it works it ain’t wrong. Just a side note. The temp gauge sensor is in the thermostat crossover and your new fan switch is in the cylinder head where it will always be hotter so most likely your fans will not shut off because it will not get down to 175 with a 180 thermostat. Check your oil pressure with a mechanical gauge, 20 psi is the lower limit.

@TurboJohnRacing Жыл бұрын

Good point! Might get a higher temp one

@prestonedmonds4128 Жыл бұрын

I've had 2 C4's and had a lot of fun in them.

@TurboJohnRacing Жыл бұрын

It’s super fun to drive!

@edwardburke5486 7 ай бұрын

Very smart to go with the 180 t At that temp the system gos into what’s called closed loop on these models and it’s important that it does . For those that don’t know what that is it would be in your best interest to check that out, open and closed loop …..

@MichaelSmith-jv7zm Жыл бұрын

Cool thanks John (no pun intended) 😁 Next time I take my dad's C4 for a cruise to get some new NEW BALANCE kicks I'll do this for him and maybe he won't forget my next birthday 🤣🤣🤣 NB factory and outlet is in our town,,, Skowhegan Maine.

@MichaelSmith-jv7zm Жыл бұрын

UPDATE: Called and talked to him about it. I'm an idiot his is a 1990 LT5 engine ZR-1 model. And been a subscriber for awhile John, Always Good content. 💪🏼

@ronski. Жыл бұрын

The dash looks like a speak-n-spell from the 80s, i like it.

@rjones2000r Жыл бұрын

They were designed to run hot for emissions purposes.

@TheBlkac1 2 ай бұрын

Its crazy how the 87 C4 is different....Mine only has one fan and my sensor is on the rear passenger side of the engine. Thanks for the video!

@Teenagegoogoomuk 25 күн бұрын

My 86 has a fan in the front which I thought was burned out and the Rad fan I use a 210F.deg. switch isolated. She'll hold 220 at stops but needs air when romping around town. Mine still has its original front fan but not used (now I know) Also she's female but still gets up goes when needed. She'a a Looker not a runner these days and a very fun car to have. Even my manual states something about these motors like to run hot but I rather not.

@robertdouglas3456 Жыл бұрын

Great job T John! Nice hot rod!🤩🤩🤩🤩

@booplesschpooples6027 Жыл бұрын

Super common on c4’s to have debris and leaves stuck in the condenser and radiator to the point they overheat sitting and are ok moving. You have to remove a ton of stuff to clean it out! Trying to hose it out without disassembling won’t work either

@TurboJohnRacing Жыл бұрын

Great point!

@dennislarson4960 11 ай бұрын

When I bought my 1994 Vette I had cooling issues (although I didn't realize at the time how hot the C4's are designed to run). Close inspection revealed exactly what you said: a bunch of leaves and debris stuck between the condenser and the radiator (maybe an inch of space between them), right in front of the auxiliary fan. C4's suck up leaves like a Hoover vacuum. It's best to remove [a ton of stuff!] to clean it out properly; I was able to fashion a toothbrush on a long narrow wooden stick and VERY GENTLY cleaned the fins (barely touching, as I know they are extremely delicate). That solved my cooling issue. Oh, and don't try using compressed air -- that will bend the fins up faster than you could do it manually.

@motownXJdad9565 Жыл бұрын

there also used to be a cold air intake kit that would draw cool air from the front liscense plate, it had a panel to replace the stock one. that will help keep temps down too. had a buddy that used to street race his vette, he had that setup itvwas nice👍

@jrsgarage3244 Жыл бұрын

I used to race those cars in the early 90s we had to put a Hypertec chip in them and a A1 160° Thermo switch, then then we put underdrive pulleys the crossfire vette went 1.38 60 ft time 14.29 quarter stock 👍 those cars are a lot of fun Top speed 145mph

@markbarnes8768 11 ай бұрын

Lmao, you did not go 1.38 60ft.

@petercermak4095 21 күн бұрын

So did I. Easy 13.5 sec car. Today mine is a 10 sec racer. Sooo much fun because most think C4 are slow.

@davidvonanderseck8649 Жыл бұрын

Man I love your builds. Learn a lot. Thsnks

@TurboJohnRacing Жыл бұрын

Glad you like them!

@sportsmansparadice42 10 ай бұрын

Hey do you happen to have a part number or a direct web link for the coolant temperature sensor? That would be greatly appreciated. Thank you.

@bentdime6333 Жыл бұрын

The nice thing about these cars is when you remove the catalytic converters (3) and install cheap used aftermarket exhaust pipes (I found a set of Hooker 2-1/4 for $200) plus a H or X pipe the car will pickup .2 in the 1/4mile and gain a few mpg . I also ended up changing from a 275 rear tire to a 285 just to gain a few mm width which also translates to a mm or two in height. After installing a little "tweaked" factory torque converter THE GAIN WAS .68 in the 1/4 mile. No engine mods and better fuel economy. No tuning . I miss that old car.

@TurboJohnRacing Жыл бұрын

Nice! That’s big improvements!

@Headsup9550 Жыл бұрын

L98's and LT1's always had low oil pressure. I had a showroom new '96 Z28 and my best friend had a '92 Z28 with an l98 and they both had low oil pressure. Yes, he had the cooler car so I bought one just like his years later.. 😂

@SwEEt-uj2ns 11 ай бұрын

Is it normal for the lt1 to have low oil pressure ? My 96 vette is normally around he 20s

@nunyabeeswax3061 10 ай бұрын

I gotta 95 vette.oil pressure when warm at idle is around 20 or a bit less.i thought it was low too but after some research gm manual said 7 to 8 psi per rpm.been driving this car 2 and a half years.bought it with 112000 miles has 133000 now. still running strong.

@mre1984 Жыл бұрын

Good stuff working with your son!

@TurboJohnRacing Жыл бұрын

The best!

@jeffjarquin5600 Жыл бұрын

You need it on at 205 and off at 195.

@RT10Viperman 6 ай бұрын

I did all of your mods on my 89 and it works perfect..! Mine runs 180 all the time now unless I really lean on it and then it rises up a little but as soon as I slow down a bit it comes right back down to 180...!!

@C0LD-_-D3V1L 4 ай бұрын

What are all the mods?

@bradydurling9764 3 ай бұрын

Yeah what are your mods? And where did u get them from?

@ILoveTinfoilHats 3 ай бұрын

You're basically always running your engine cold. Don't do that unless you want premature wear. At most put a 200 degree switch, 180 is way too much.

@RT10Viperman 3 ай бұрын

@@ILoveTinfoilHats Well...Now that the weather has heated up it runs at 200 to 210

@danmyers9372 Жыл бұрын

Nice job John. That instrument gauge is totally 1980’s. Looks like the designers took it straight from KITT. 🤣

@houstonpeyton Жыл бұрын

That dash is legit

@KevinzGarage Ай бұрын

This will work…but… the car is running hot because there’s debris blocking airflow through the radiator. You can fix that by pulling the radiator out and spraying it out. Then the car will cool like normal.

@adamdozier5757 Жыл бұрын

At least you bought a Chevy!!!!!!!!!! Funny how primitive those gauges look. Wow.

@mustangal8534 Жыл бұрын

It's officially a turbo John car now!

@Billyjohn1961 8 ай бұрын

Great idea …. The instructions were very confusing…. Redo the video and spend more time showing the wires and connections, just to make it more clear for those of us not mechanically inclined. Thanks

@bartpang Жыл бұрын

If you take the coolant hoses off the throttle body and loop them it will run a .10 quicker.

@Headsup9550 Жыл бұрын

Worth doing? Yes! But a tenth? Not in my experience. Makes hardly any difference at all in ET but it always made me feel better to do it..

@randallmason9687 Жыл бұрын

Cutting a ram air hole where the front license plate goes was the coolest cold air intake mod back then!

@TurboJohnRacing Жыл бұрын

I did that too

@thehotrodstation3313 Жыл бұрын

I did this. Only problem i had was cooling fan motors didn't last long as they run almost all the time. But cool ,,,,is cool 😎

@TurboJohnRacing Жыл бұрын

Yep

@michaelcabral2174 Жыл бұрын

Rule of thumb is 10 psi per 1000 at operating temperature so whatever the tach says add two zeros while you’re driving matches or is close enough, you’re good

@TheBlkac1 Ай бұрын

Good video! I was wondering? if you made a different ground other than the one on the radiator, for the cooling fan?

@mikemontgomery7337 Жыл бұрын

Always scary when John talks wiring !!!! Lol

@user-lv9vj8vr5s 5 ай бұрын

What is the actual name of the sensor he installed

@eclecticetcetera7040 Жыл бұрын

LS swap time. That looks like a good back of the track canidate.

@MrBayoubig Жыл бұрын

That earl pressure is scary

@Headsup9550 Жыл бұрын

Yes but it's also normal l98 pressure

@richardharris492 Жыл бұрын

I had 1 with 10lbs at idle never went over 30psi under acceleration, still running today

@TurboJohnRacing Жыл бұрын

Nice!

@RSAW73 Жыл бұрын

You can buy a fan switch for an 86-87 3.8 Turbo Buick Regal. That one turns on at 213, off at 203. It's the one Hypertech used to sell.

@EHUE-kf4ey Жыл бұрын

NEXT, NOW WHAT TEMP T-STAT DO U USE/RECCMEND WITH THIS SWITCH??

@RSAW73 Жыл бұрын

@EHUE-kf4ey Run the stock thermostat with that switch.

@sportsmansparadice42 10 ай бұрын

1990 and 1991 does not have the temp switch on the driver side.

@Polydeukes68 Ай бұрын

Yes, and both fans are controlled by ECM. However, you can install a low temp kit which comes with a sensor you can install to the driver side and then splice it to the original wiring. This will override the ECM settings. And the sensor on passenger side is for the gauge.

@curlracing276 Жыл бұрын

Do a hard pull in the vette and run some passes in it

@garysistrunk1700 Жыл бұрын

I don't know what weight oil your running but I would try a higher viscosity and see if it helps the pressure before rebuilding engine worth a try.

@TurboJohnRacing Жыл бұрын

Yes, I changed it to 20w50 and it’s a little better hot.

@eddiewilson7525 Жыл бұрын

Just done this today and worked perfectly. Thanks for the video.

@shoresharp8349 Жыл бұрын

That corvette looks clean TJ , whats its name??? I would call it white boy Rick lol.

@michealwriska2920 Жыл бұрын

Hey Tj a vet nice

@TurboJohnRacing Жыл бұрын

Thanks

@motownXJdad9565 Жыл бұрын

the question now is can the alternator handle those fans running at the same time

@mariocooldude9092 5 ай бұрын

The auxiliary one is puzzy ass . probably only draws 5-9amps

@goldcoastslim2117 25 күн бұрын

@@mariocooldude9092 mine is handling it just fine

@PaulRhodes420 Жыл бұрын

Hey John, if I called you Dad, will you get me one?...... Dad! ✌️😂

@TurboJohnRacing Жыл бұрын

😂

@PELEGSM 11 ай бұрын

Will you add a link for buying this part?

@maxlopez122 Ай бұрын

Is it still working as planned.

@TurboJohnRacing Ай бұрын

Yes, it works great and did help a lot. I also put an all aluminum radiator in it after this and now it really stays cool. Usually 175-185 degrees on the really hot days now.

@jcnpresser Жыл бұрын

That oil pressure is kinda sketchy, might just need a sensor. Heck I drove my truck around forever with low op at hot idle, but it come up to 40 or so driving. Heck you might just need an oil change with some 10/40.

@TurboJohnRacing Жыл бұрын

Input 20w50 in it, it helped a little

@ThePaintPaperHustle Жыл бұрын

👀

@kennygibbs9627 2 ай бұрын

Why not just change radiator to the New aluminum ones 🤔

@lincolnstovall9471 Жыл бұрын

Chinese numbers? What?? LOL !!! Three steps towards the door. Leave that to you. Shocking !👍🤙👍🤙

@TurboJohnRacing Жыл бұрын

? I don’t understand!

@scottdiehl1409 Жыл бұрын

Just wondering if your thermostat is rated higher are you going to overheat the block????

@attitudeadjusted9027 Жыл бұрын

Probably what will happen is since the sensor for the fan is lower than the thermostat the fans will run all the time and burn the fans up🤯

@mariocooldude9092 5 ай бұрын

@@attitudeadjusted9027hahaha 😂no it won't

@baby-sharkgto4902 Жыл бұрын

Nice work

@BackAlleyBiker 3 ай бұрын

Did you say murdor? I think you meant to say motor.

@Stevesbe Жыл бұрын

Did you order a pair of new balance 👟 to drive this car

@TurboJohnRacing Жыл бұрын

😂

@danmyers9372 Жыл бұрын

New balance kicks, Raybans and a mullet.

@tbone67gthenderson78 Жыл бұрын

😎

@mjot2360 7 ай бұрын

It's not broken so don't fix it.

@pilotgeorge2000 2 ай бұрын

Oh shut up

@mjot2360 2 ай бұрын

@pilotgeorge2000 The engines were designed to run hot. There is nothing to fix. It's a retarded video.

@arewefree 2 ай бұрын

Hello, thanks a bunch for all that info. Got my fans working excellent. Question, at the 633 mark you started the front fan. What did you touch with that wire to start the fan. you didn't show that. Was it the positive on the battery, or was it grounding that wire? Thanks again.

@TheBlkac1 2 ай бұрын

I believe it was the grounding wire....I was wondering are both fans running at the same time?

@frankhusted764 11 ай бұрын

The reason why they have it running hot as the burner fumes off on a Cadillac converters you're not running your Cadillac converters and you can run it at 195 185

@frankhusted764 11 ай бұрын

Change your thermostat to you want to run core change of thermostat car runs like or lot better I unhooked the world line going for the throttle body and it runs better too let's run heat for the throttle body don't make any sense it's alright for wintertime summertime NOCO