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Car Forum / GMC Cars / December 2005

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96 Sunfire Overheats

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mvestr1 - 01 Dec 2005 18:00 GMT
1996 Sunfire 2.2L 4Cyl. Overheats. Coolant is full. Cooling fan works. New
water pump. New pressure cap. Replaced thermostat twice. Both purchased
from same supplier. Could both thermostats be faulty? Any suggestions?
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Mike Marlow - 02 Dec 2005 00:37 GMT
> 1996 Sunfire 2.2L 4Cyl. Overheats. Coolant is full. Cooling fan works. New
> water pump. New pressure cap. Replaced thermostat twice. Both purchased
> from same supplier. Could both thermostats be faulty? Any suggestions?

Does it use coolant?

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-Mike-
mmarlowREMOVE@alltel.net

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HLS@nospam.nix - 02 Dec 2005 01:09 GMT
> 1996 Sunfire 2.2L 4Cyl. Overheats. Coolant is full. Cooling fan works. New
> water pump. New pressure cap. Replaced thermostat twice. Both purchased
> from same supplier. Could both thermostats be faulty? Any suggestions?

Not likely at all that both thermostats are bad.
Are you sure you have bled the air out of the engine?

You are pretty much down to
(1) radiator plugged or partially plugged
(2) internal engine problems, cracked head or block, blown head gasket, etc.
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=AB Paul =BB - 02 Dec 2005 02:14 GMT
> 1996 Sunfire 2.2L 4Cyl. Overheats. Coolant is full. Cooling fan works. New
> water pump. New pressure cap. Replaced thermostat twice. Both purchased
> from same supplier. Could both thermostats be faulty? Any suggestions?

What makes you think its over heating?
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HLS@nospam.nix - 03 Dec 2005 22:49 GMT
> > 1996 Sunfire 2.2L 4Cyl. Overheats. Coolant is full. Cooling fan works. New
> > water pump. New pressure cap. Replaced thermostat twice. Both purchased
> > from same supplier. Could both thermostats be faulty? Any suggestions?
>
> What makes you think its over heating?

As always, that is a really good question...
I wish we had a place to do an FAQ about cooling systems.  This situation
comes up so much it would be a service to the group.
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