Still Overheating
Thread Starter
Racer
Joined: Sep 2008
Posts: 403
Likes: 7
From: Space Coast Florida
First, verify temps w/ known t'meter.
Sounds like yours sorely needs a thorough chemical cleaning & flush of entire cooling system. Don't simply flush it, CLEAN it too. That rust collects in flues, jackets & passages; can/will cause eratic cooling. I dunno if still available at local GM dealer parts dept ... was under $10 ... heavy duty cleaner GM p/n 12346500 ... it works! Flush then clean then flush again then replace t'stat & cap.
Many posts here on cleaning cooling system; do a search if the above ain't sufficient.
Sounds like yours sorely needs a thorough chemical cleaning & flush of entire cooling system. Don't simply flush it, CLEAN it too. That rust collects in flues, jackets & passages; can/will cause eratic cooling. I dunno if still available at local GM dealer parts dept ... was under $10 ... heavy duty cleaner GM p/n 12346500 ... it works! Flush then clean then flush again then replace t'stat & cap.
Many posts here on cleaning cooling system; do a search if the above ain't sufficient.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Be prepared: when motor sits a long time & coolant/water rusty ... be prepared one or more freeze aka expansion plug will rust through & leak.
-also 21boy- suggest fillout your forum profile to include approximate geographic location ... we don't need to know your street address ... but sometime you may need location-specific info.
Last edited by jackson; Dec 9, 2008 at 02:00 PM.
