2006 PONTIAC GRAND PRIX
170,000 MILES
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PAULRAMOS
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overheating is there more than one thermoswitch?/ i have replaced thermosencor water pump thermostat 3 fan relays and flushed the system....now i have n oticed the two fans come on but they are only on low i havnt seen them onn high ...only once suspect there may be a seqincer or something i may have missed somewere???
Apr 7, 2013 at 8:06 PM
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ASEMASTER6371
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what was the original issue??

Roy
Apr 7, 2013 at 8:07 PM
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ASEMASTER6371
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did it overheat??

Roy
Apr 7, 2013 at 8:08 PM
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PAULRAMOS
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yes still overtemp
Apr 7, 2013 at 8:09 PM
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ASEMASTER6371
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ok, you may have damaged a head gasket which would explain the fans not working

have a leak down test done to confirm

Roy
Apr 7, 2013 at 8:11 PM
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PAULRAMOS
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is there a sequincer or something between the thermosencor and comp??
Apr 7, 2013 at 8:23 PM
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ASEMASTER6371
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no, the only one is the coolant sensor which has no bearing on the overheating.

Roy
Apr 7, 2013 at 8:23 PM
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PAULRAMOS
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what is a leak down test??
Apr 7, 2013 at 8:25 PM
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ASEMASTER6371
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air is inserted into the cylinder and the pressure is monitored to see if it drops and look for moving the coolant in the radiator.

Roy
Apr 7, 2013 at 8:27 PM
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PAULRAMOS
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is it dificult to replace head gaskets
Apr 7, 2013 at 8:29 PM
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ASEMASTER6371
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major engine work. not reccomended for a job at home

Roy
Apr 7, 2013 at 8:29 PM