1993 GMC Jimmy Overheating

1993 GMC JIMMY

JOHNPFINLEY

MEMBER
1 POST

I have a 1993 GMC Jimmy S15, 4.3L V-6, 135,000 miles. Have problem with overheating, Changed Thermostat, Radiator, Temp. sensing unit, Coolant Sensor. Help please, this is driving me nuts.

Mar 7, 2007 at 11:19 AM

CHEVY22

✓Experienced Mechanic
1,375 POSTS

have you tried, the water pump ,

Mar 7, 2007 at 1:12 PM

STEELWEELS

MEMBER
60 POSTS

i agree with chevy, the water pump maybe froze up and not working properly, the bearing may be gone, easy way to check this is to to look for leaks around the pump itself, take off belt to pump, and try to wiggle the fan blade up and down, it should be solid, if it moves, then the bearing is gone in the pump, not a hard fix, if you know what you are doing, this should take no longer than an hour to replace, make sure you have all the areas dry before re-installing the pump, you will have to dry out the holes to the block with a rag so that the sealant can cure

Mar 8, 2007 at 4:02 AM

Suggested Repair

Inspect the water pump for leaks and bearing wear. Remove the belt and check the fan blade for up-and-down play; movement indicates a failed pump bearing. Replace the pump if needed, and dry the mating surfaces and block holes so the sealant can cure.

Conversation Summary

The owner of a 1993 GMC Jimmy 4.3L reports overheating after replacing the thermostat, radiator, temperature sensing unit, and coolant sensor. Experts recommend checking the water pump for leaks and a worn bearing by wiggling the fan with the belt removed, then replacing the pump if necessary and keeping the surfaces dry so the sealant can cure.

Add a reply

Ask a new question

1993 GMC Jimmy Overheating

Suggested Repair

Conversation Summary

Related Repair Questions

Frequently Asked Problems for This Vehicle