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Old 08-14-2002, 11:34 AM
Rockman59 Rockman59 is offline
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Join Date: Aug 2002
Location: La Quinta, CA
Posts: 271
I just had this same problem only with my 1992 GMC Suburban 350 V8 engine.....turned out it was a faulty thermostat. Water gurgled in the expansion tank when engine was turned off after high speed travel and filled the expansion tank until it overflowed. The heat guage had been reading higher than normal for several days but still within acceptable limits. Yesterday in finally moved up into the "red zone". The radiator and water pump were new in the past 20,000 miles so that pretty much narrowed it down to the thermostat...and that's what it was.
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