C4 Corvette Running Hot? Simple DIY Mod to fix!! $25 Bucks
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- Опубліковано 31 лип 2023
- 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.
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I spliced in a toggle switch so I can turn the fans on at any temp
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.
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.
Good point! Might get a higher temp one
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!
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.
Great job T John! Nice hot rod!🤩🤩🤩🤩
Man I love your builds. Learn a lot. Thsnks
Glad you like them!
I've had 2 C4's and had a lot of fun in them.
It’s super fun to drive!
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.
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.
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. 💪🏼
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 …..
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👍
The dash looks like a speak-n-spell from the 80s, i like it.
At least you bought a Chevy!!!!!!!!!! Funny how primitive those gauges look. Wow.
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
Lmao, you did not go 1.38 60ft.
Nice job John. That instrument gauge is totally 1980’s. Looks like the designers took it straight from KITT. 🤣
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.
Nice! That’s big improvements!
Good stuff working with your son!
The best!
You need it on at 205 and off at 195.
That dash is legit
It's officially a turbo John car now!
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.. 😂
Is it normal for the lt1 to have low oil pressure ? My 96 vette is normally around he 20s
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.
Good video! I was wondering? if you made a different ground other than the one on the radiator, for the cooling fan?
LS swap time. That looks like a good back of the track canidate.
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 😎
Yep
They were designed to run hot for emissions purposes.
Will you add a link for buying this part?
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
Great point!
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.
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
What is the actual name of the sensor he installed
If you take the coolant hoses off the throttle body and loop them it will run a .10 quicker.
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..
Cutting a ram air hole where the front license plate goes was the coolest cold air intake mod back then!
I did that too
That corvette looks clean TJ , whats its name??? I would call it white boy Rick lol.
1990 and 1991 does not have the temp switch on the driver side.
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...!!
What are all the mods?
Yeah what are your mods? And where did u get them from?
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.
@@smoothbraindetainer Well...Now that the weather has heated up it runs at 200 to 210
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.
Yes, I changed it to 20w50 and it’s a little better hot.
Just done this today and worked perfectly. Thanks for the video.
Nice work
Hey John, if I called you Dad, will you get me one?...... Dad! ✌️😂
😂
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.
NEXT, NOW WHAT TEMP T-STAT DO U USE/RECCMEND WITH THIS SWITCH??
@EHUE-kf4ey Run the stock thermostat with that switch.
Always scary when John talks wiring !!!! Lol
the question now is can the alternator handle those fans running at the same time
The auxiliary one is puzzy ass . probably only draws 5-9amps
Hey Tj a vet nice
Thanks
Just wondering if your thermostat is rated higher are you going to overheat the block????
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🤯
@@attitudeadjusted9027hahaha 😂no it won't
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.
That earl pressure is scary
Yes but it's also normal l98 pressure
I had 1 with 10lbs at idle never went over 30psi under acceleration, still running today
Nice!
Do a hard pull in the vette and run some passes in it
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.
Input 20w50 in it, it helped a little
👀
Is it still working as planned.
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.
Chinese numbers? What?? LOL !!! Three steps towards the door. Leave that to you. Shocking !👍🤙👍🤙
? I don’t understand!
😎
Did you order a pair of new balance 👟 to drive this car
😂
New balance kicks, Raybans and a mullet.
Why not just change radiator to the New aluminum ones 🤔
Did you say murdor? I think you meant to say motor.
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
It's not broken so don't fix it.
Oh shut up
@pilotgeorge2000 The engines were designed to run hot. There is nothing to fix. It's a retarded video.
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.
I believe it was the grounding wire....I was wondering are both fans running at the same time?
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
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
I put a wire on my fan to power to run all the time when the car is running. Stays nice and cool.