Z06 overheatng
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Racer
Joined: Nov 2020
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From: Las Vegas
Z06 overheatng
Its been a couple weeks since I drove the 03 Z06. I took it out for a drive and before I got 10 miles, it was running hot. I pulled into a friends mechanic shop and let it cool down. The mechanic says the reservoir cap seal is bad....I drove it home and no heating issues...temps were right about 210-220f. I stopped and ordered a new cap and got new radiator fluid. Will change it out Saturday when the new cap comes in. They did have a cheaper aftermarket cap in stock, but I opted for the OEM
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Joined: Oct 2004
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First place I'd look is up in the 'bottom feeder' area, in front of the condenser. Make sure nothing is in front of it, like a plastic garbage/grocery bag. If that checks out, pull the plastic upper radiator mount. Then you can look down between the radiator and condenser. I made up a small air tool out of threaded pipe, that screws into my airgun. Put a 90° street elbow on the other end, which turns airflow 90°. Then I can blast the condensor from behind. You'll be amazed how many bugs your C5 has murdered thru the years!!!
Last edited by grinder11; Sep 20, 2021 at 03:25 PM.
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sounds like you had something up in there like a plastic bag that dropped out when you stopped, either way I would check that before saying the cap was all of a sudden bad
Race Director
Joined: Oct 2004
Posts: 12,864
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Its been a couple weeks since I drove the 03 Z06. I took it out for a drive and before I got 10 miles, it was running hot. I pulled into a friends mechanic shop and let it cool down. The mechanic says the reservoir cap seal is bad....I drove it home and no heating issues...temps were right about 210-220f. I stopped and ordered a new cap and got new radiator fluid. Will change it out Saturday when the new cap comes in. They did have a cheaper aftermarket cap in stock, but I opted for the OEM
