coolant problem
Thread Starter
Junior Member
Joined: Mar 2010
Posts: 21
Likes: 0
coolant problem
Let my 87 305 tpi run in the driveway the other night and it got up to about 180 degrees. I noticed that the coolant expansion tank on under the hood was clean full of antifreeze. I shut the car off and after a few minutes it went down. could this be a bad thermostat or a head being junk? also the electric fans are on constantly.
Member
Joined: Apr 2010
Posts: 251
Likes: 0
From: phx,az
Car: 84 firebird, 85 transam
Engine: 350 SBC Or 7.07 Tonys,305stock
Transmission: Big Ugly, 700r4
Axle/Gears: 4th gen rear disk 3.42 lsd,9 bolt
Re: coolant problem
When the car is running the coolant expands and when the car sits it contracts and pulls coolant from the recovery tank. That's why there is a hot and cold fill line
Supreme Member
iTrader: (8)
Joined: Jul 2001
Posts: 3,204
Likes: 7
From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: coolant problem
I agree. Seeing it rise when hot is normal. If it's all the way to the top of the lid and it's clean (no oil... etc) sounds like you overfilled it.
Joined: Jun 2000
Posts: 5,364
Likes: 51
From: Enschede, Netherlands
Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98
Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI
Transmission: T5, 700R4, T5, 700R4
Axle/Gears: 3.08, 3.27, 3.45, 3.27
Re: coolant problem
not if it was well below the full hot mark when running. If it was at the full hot it should not come below the cold mark. If it does, you're loosing coolant somewhere.
Thread
Thread Starter
Forum
Replies
Last Post