engine getting hot
Thread Starter
Teching In
Joined: Dec 2006
Posts: 22
Likes: 0
engine getting hot My temp gauge all of the sudden started rising when I was driving today, it got really hot when I was stopped, like at a stoplight. When I would drive the temp would go down, so I know there is somthing wrong with the cooling fan. The engine coolant level is fine, no leaking. So I replaced all three cooling fan relay switches. It still gets hot, and now the service engine soon light is on. Anyone have any suggestions?
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
If you suspect they're not coming on at all you can check the fans/wiring/relays on the 95-97 cars by jumping the pins at the 16 pin DLC connector as a test. See http://shbox.com/1/4th_gen_tech2.html#cooling (scroll down). Also could be something as simple as a bad radiator cap not holding pressure.
I would suggest checking the cap, make shure that it is fully seated and the gasket is there and in good condition, if need be caps are not too much in price, if that does not work than make shure nothing is blocking the flow of the radiator, and blow some compressed air through the fins, like 10 psi, there could be some dirt build up
I know this has been discussed many times, but just in case anyone isn't aware the fan activation temps are very high in these cars, I believe it's 227 degrees for the low speed fan and 235 for both low and high fans together. That's why a lot of people either reprogram the pcm to turn them on sooner or hook up manual fans activation switches to turn them on whenever you want them. That's what I'm going to do. There's a little writeup on that here:
http://shbox.com/1/fan_sw_diagram2.jpg
http://shbox.com/1/fan_sw_diagram2.jpg
Trending Topics
Registered User
Joined: Apr 2007
Posts: 2
Likes: 0
I had same problem with 2000 WS6. Checked fans, OK, flushed cooling system problem remained. Replaced radiator problem solved. I am in Arizona so overheating can't be ignored at all. I always use distilled water and antifreeze, but still had rust ect build up in the radiator after 130K miles.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
buy manual fan switch, had the same promblems a while back, flushed radiator, new cap, new thermostat, relays checked, fuses good, fans were good, engine temp sensor replaced, tried everything, eventually just bought a manual fan switch from summit and fixed the promblem. some guy posted a while back saying he had the same promblem and it turned out to be a promblem with his engines computer.
