Notifications
Clear all
0
08/02/2022 9:46 am
Topic starter
1998 GMC Jimmy V-6 4.3-overheating especially when AC used, heater doesn't work, changed out radiator, flushed system, changed thermostat, minor condensation in oil but no froth, no significant loss of coolant; still no heat and engine over heating.
3 Answers
2
08/02/2022 10:02 am
How old is the water pump? Impeller might be loose or corroded. You might also want to check coolant for exhaust gases (blown head gasket).
https://www.youtube.com/watch?v=evpaTW2WJ5Y
1
08/02/2022 9:59 am
Your heater core can be clogged/bad. You might even have air in the system. Try bleeding it and see if that helps
0
08/02/2022 10:08 am
Take a look at your radiator cap, the fan clutch and the temp sending unit for proper function. On a vehicle this old, I'll bet the fan clutch is shot.
