Need help! At my wits end!
Thread Starter
Pro
Joined: Apr 2010
Posts: 530
Likes: 2
From: Havasu, AZ
Need help! At my wits end!
Long story! 1988 Vette was running great last spring . It ran a little hotter than I like, but well within specs, until the main fan motor burned out. It got a little hot, but not enough to turn on the warning light. I got it home and then left to go north for the summer. Came back and installed a new autozone fan motor. It still overheats! I changed the thermostat twice. Now running a 160 * but going to change it again to a 180. I checked, cleaned between the radiator. Changed the belt. etc, etc. I have made sure the autozone fan turns the right rotation.I have both fans running all the time. One post mentioned a radiator hose collapsing. Will check that next. I think a bad head gasket would have other symptoms like white smoke and stuff. It doesn't overheat quickly. Creeps up one degree at a time over an hour or so on the road.
TIA
TIA
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
I would suspect that the replacement auto zone fan does not move the same among of air as stock and that is causing your issue. If all was fine before and this was the only change, start there. You did additional cleaning which should help the issue.
Melting Slicks
Joined: May 2014
Posts: 2,897
Likes: 592
From: New Port Richey FL
Is coolant properly mixed, Because if you have to much Coolant than Water you Can have a Overheat problem. Flow rate is reduced fluid thicker and heat Transference is also reduced as Bonus Kick in the Pants.
Last edited by s carter; Oct 29, 2018 at 08:05 AM.
Le Mans Master
Joined: Feb 2005
Posts: 6,485
Likes: 566
From: Clearwater Florida
….. Is the air dam still intact under the nose ? … without it the air flow through the radiator won't be adequate … the fan is there to help the cooling at low or no vehicle speed … airflow takes over once the car is in motion … I suspect that the lower tubes on your radiator are clogged …..
Pro
Joined: Aug 2007
Posts: 668
Likes: 38
From: Austin TX
That air scoop is like a vacuum. Picks up ever leaf or plastic bag from the road. Look up in there and clean the crap out. If that doesn't work, install an aftermarket radiator. I installed a Champion 3 core in my 92 base model. https://www.championradiators.com/Ch...ator-1989-1996
