Changed Coolant; Overheating Now
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
sounds like it. Dexcool is a brand name by the way, not a product. Like NOS is a brandname of nitrous, or band-aid is a brand name of bandages. It is highly highly unlikely that the Prestone caused the issue. As long as was the Prestone that has the GM compatible number on the back.
Thread Starter
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Joined: Sep 2003
Posts: 53
Likes: 0
From: Richardson Tx
I know this thread is old, but I found something other than replacing my radiator cap that will help others having the "burping" issues. I found most of my overheating problems were caused by air getting stuck in the top of the motor. I tried the whole gambit of exorcisms to get it out, including jacking one side of the car up to coerce the air out.
Finally, I used a bleeder pump I had bought from Harbor Freight to do a one-man brake bleed and hooked it up to the coolant tube under the throttle body and just kept sucking the air out until I got a good stream of coolant. Stuck the hose back on and bingo! All without burning my hands on hot coolant, no cycling through the multi-step shop manual process, no driving around the block only to watch the gauge peg up to the danger zone, etc.
Hope this helps someone down the road.
Finally, I used a bleeder pump I had bought from Harbor Freight to do a one-man brake bleed and hooked it up to the coolant tube under the throttle body and just kept sucking the air out until I got a good stream of coolant. Stuck the hose back on and bingo! All without burning my hands on hot coolant, no cycling through the multi-step shop manual process, no driving around the block only to watch the gauge peg up to the danger zone, etc.
Hope this helps someone down the road.
I'm definitely bookmarking this! 
