89 getting into 265 range.
Thread Starter
7th Gear
Joined: Dec 2021
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89 getting into 265 range.
I’ve read all the posts about the car naturally runs hot, but if it is above 90, I am getting into 260-270 range after a few red lights. What should I look for or do? Thermostat?
Last edited by tmarcion; Jun 8, 2022 at 01:03 PM.
Safety Car
Joined: Dec 2009
Posts: 4,363
Likes: 429
From: Birmingham Al
Well, the radiator is more than likely original and needs to be professorially cleaned out, gets build up in it and cuts down on its cooling compacity. I would try that first the radiator cools the car not the thermostat, the thermostat regulates coolant flow, but the radiator does the cooling .. I had 3-C4s in Houston TX in summer 100 % everyday I just went with 3-row radiator 160 stat , chip and forgot about it ..But that not cheap to do but worked ,I would try the radiator clean out first ..
Drifting
Joined: Oct 2020
Posts: 1,397
Likes: 437
From: Marlton NJ
That is getting way too hot. No offense intended but does it have coolant in the overflow tank? You can check it cold or hot there are marks for either way on the tank dipstick.
if so I would take a real close look at the radiator itself, does it appear to be clean or caked up with road debris?
what temp thermostat are you running?
if so I would take a real close look at the radiator itself, does it appear to be clean or caked up with road debris?
what temp thermostat are you running?
Team Owner
Joined: May 2000
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From: Plantation Florida USAF(Retired) 1966-1990
U.S. Air Force
St. Jude Donor '05 thru '26
NCM Sinkhole Donor
I would check for leaves inside between the radiator and A/C radiator, there vacuum cleaner that sucks up everything, I once pack of cigarettes crushed no smokes, that also can make the car not cool properly. I own 89 for 23 years, and when I pulled my radiator what surprise.
I would check that area, and in the day of C4, some parts catalogs made a screen to keep leaves out.
I would check that area, and in the day of C4, some parts catalogs made a screen to keep leaves out.
Drifting
Joined: Feb 2017
Posts: 1,274
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From: Tacoma WA
2024 C4 of the Year Finalist - Unmodified
Not sure where you reside since your profile does not mention it but I hope you do not continue to drive the car at those temperatures. You are running a risk of damaging the head gaskets through over heating resulting in warping the aluminum heads. If you do not have the skills to troubleshoot and repair the problem find someone soon or it could lead to a lot more costly repairs.
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From: Livermore, CA
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Upgrade fan
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Joined: Apr 2019
Posts: 87
Likes: 29
From: Livermore, CA
2023 Corvette of the Year Finalist - Unmodified
2022 C4 of the Year Winner - Unmodified
Upgrade fan
SPAL Electric Fan Upgrade Kit. $289.99 from Zip Corvette after I cleaned all the leaves out. Had to be 100° out to get close to 230°