Question about 1991 Chevrolet K1500
It appears to be a known problem! Read all the links on this page. Things suggested, bad clutch on the fan, worn impeller in the water pump, blown head gasket causing pressure in the system and preventing water flow,
91 chevy 1500 overheating Google Search
Posted on Aug 02, 2017
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Posted on Jan 02, 2017
SOURCE: Thermostat on 2002 Chevy Impala
the best thing to get is the Haynes manual for your car at advanced auto or autozone or somewhere like that and the book will tell you how to take everything apart and put it back. i think the manual is about $16.00
Posted on Jul 30, 2008
SOURCE: coolant bizarre behavior
if car doesn't run hot with no thermostat...you may be air-locking system when installing thermostat. I always fill the engine block up to the thermostat housing to make sure that engine is full of fluid ..then install thermostat...spring facing down..thenfill radiator making sure car is running so as not to air lock system ...run until top hose gets warm ,showing that your thermostat opened
Posted on Nov 25, 2008
Have you tried replacing the overflowtank top. This can cause your problem. A lot of people don't realize this. It gets worn and can;t hold the pressure of coolant. Change it out $8 and let us know.
Posted on Jan 27, 2010
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