Overheating

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Aug 17, 2006 | 06:13 PM

C5 Forever

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Overheating

I was cruising around on lunch today and I my temp ran up to 235. I think this is a little hot for city driving. I just flushed the radiator a few weeks ago. On an LS1 are there any tell tales for water pump failure? I know on older 350's you can just grab the fan and wiggle it, but that's not an option here. Maybe a thermostat gone bad? I dunno, any help would be great.

Aug 17, 2006 | 07:13 PM

00turboT/A

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From: 20 Minutes North of ATL

Sounds like the thermostat might be stuck. Check that first. It happend on my sisters WS-6 and it was just stuck.

Aug 17, 2006 | 10:28 PM

~JOSHUA

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When the car is cold, crank it up with the radiator cap off. When the temp bumps the thermostat open you should see the coolant flowing inside the radiator.

Once the coolant gets really hot it'll just try to overflow out of the opening, so do it on a cold start-up...

I'd pop in a 160* stat anyway. (Might as well let the coolant flow around at a lower temp) If it's still having issues then you know it wasn't the 'stat.

Aug 21, 2006 | 01:21 PM

C5 Forever

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I talked to a few guys at the shop and that is just the way it is out here during the summer. I was 235 all the way to Phoenix Friday afternoon. I'm going to throw in the 160 stat anyways. That should help some.

Aug 21, 2006 | 02:14 PM

infinitebird

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Program your fans to come on earlier or get a fan switch and it will stay cooler.

Aug 21, 2006 | 02:51 PM

slt200mph

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From: HOT'LANA, GAWJA

If my memory serves me the fans on a C5 come on at 228 degrees..so I would not worry about it..

Aug 21, 2006 | 03:54 PM

infinitebird

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Quote:

Originally Posted by slt200mph

If my memory serves me the fans on a C5 come on at 228 degrees..so I would not worry about it..

That's the low speed fan, the high speed one comes on at 235. So if the max temp you are getting is 235, then the high speed fan is maintaining that temperature. If you reprogram both the fans to come on earlier, it will run cooler.