Jake Guzman

I know I've posted about this several times and I apologize, so here we go. I have a 95 z28 and the damn thing keeps overheating. Everything that's been replaced: both cooling fans, radiators been flushed, 3 all new fan relays, new waterpump, both temp sensors, new Rad cap have been replaced. I pulled the temp sensor on the front of the engine and both fans kicked on at high speed. It overheats at idle I would appreciate any advice. The A/c has no freon, I think I read somewhere shobox that the fans wouldn't come on without freon in the system? Someone correct me if I'm wrong thanks.

Chet1185

I deleted my AC and my fans work. Are you following the proper filling procedure. You have to make sure there is no air in the system.


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shoebox

What I said was the fans won't come on with the a/c, if the a/c is not charged and compressor operation is inhibited by lack of pressure. This does not affect fan operation otherwise.

OP, give more details on "overheating".

Jake Guzman

It'll just overheat at idle like stop lights or just sitting around. Both of the fans came on after I pulled the front Temp sensor. It gets up to the 260 line on the gage. Would a fan switch and 160* theremostat help?

Injuneer

That would be putting a band-aid on a screwed up system. Might fix it, might not. Fix the system.

There has to be a reason the fans are not operating when they are programmed to come on. Use a scanner to determine the coolant temp the PCM is indicating from the sensor in the water pump. Could be a wiring problem.

Injuneer

Previous threads for reference:

https://www.camaroz28.com/forums/gen...roblem-871377/

https://www.camaroz28.com/forums/gen...eating-873445/

Jake Guzman

How would I go about going to check the sensor

shoebox

4th Gen LT1 F-body Tech Articles

jdavis1226

Run a switch from fan to the inside of car fans on camaros really chevys have that problem the rely tells fan to cut on to late this will keep engine cool

CamaroFbody

If your fans end up working correctly......Check for headgaskets leaking, hook up a coolant system pressure tester and see what happens, check for coolant getting into cylinders. Thats what i did to mine when it was overheating after checking out everything else. Headgaskets ended up being bad..they were leaking, car would hit 260 and puke out coolant from overflow bottle.