My 1995 Pontiac Grand Am
repairs made = water pump, intake gaskets, thermostat, coolant temp
sensor, coolant flush.
Question = This thing keeps overheating at idle well over the
220 mark. What else could it be there is no leak form the block or
steam out the exhaust. Please help!
KK:
A couple of things to look at. You need to see exactly what the coolant temp. Is by
using a scanner to make sure the gauge is accurate. The low speed cooling fan
wont come on until 226 degrees, so you are not overheating until after that. Make
sure the fan does come on at 226 f. Another thing to look for is bubbles in the
radiator. That would be a sign of a blown head gasket. Those were known to leak
externally, or blow internally at the lower portion of the rear head all the way on the
pass. side; as viewed from underneath. A restricted radiator can also cause this.
Sometimes the radiator will have 'cool' spots in it as compared to the rest of the
radiator. Best way to check is with a laser temp. gun, but can do with you hands as
long as you are careful not to get near fan blades. Let me know what find if you
need more help.
repairs made = water pump, intake gaskets, thermostat, coolant temp
sensor, coolant flush.
Question = This thing keeps overheating at idle well over the
220 mark. What else could it be there is no leak form the block or
steam out the exhaust. Please help!
KK:
A couple of things to look at. You need to see exactly what the coolant temp. Is by
using a scanner to make sure the gauge is accurate. The low speed cooling fan
wont come on until 226 degrees, so you are not overheating until after that. Make
sure the fan does come on at 226 f. Another thing to look for is bubbles in the
radiator. That would be a sign of a blown head gasket. Those were known to leak
externally, or blow internally at the lower portion of the rear head all the way on the
pass. side; as viewed from underneath. A restricted radiator can also cause this.
Sometimes the radiator will have 'cool' spots in it as compared to the rest of the
radiator. Best way to check is with a laser temp. gun, but can do with you hands as
long as you are careful not to get near fan blades. Let me know what find if you
need more help.
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