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1995 Pontiac Grand Am Engine overheating

Tiny
DMDODGE1980
  • MEMBER
  • 1995 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 126,000 MILES
The fan relay is fine, the fan motor was replaced. But the car is still over heating. There is an audible knocking noise coming from the cooling system itself. The engine heat will spike past 220 then for what seems like no reason it will suddenly just drop down to normal operating temp of about 160. Any Ideas?
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Monday, October 11th, 2010 AT 1:27 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try replacing the thermostat and go from there
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Monday, October 11th, 2010 AT 5:01 PM
Tiny
DMDODGE1980
  • MEMBER
  • 2 POSTS
In the last month alone, I have replaced the thermostat, coolant fan motor, and water pump. It still over heats and doesn't blow hot air. The heater core was replaced last year. The knock has lessened but it still overheats. What am I going to have to do next?
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Saturday, October 16th, 2010 AT 4:22 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be airlock in the system try bleeding it-don't work get it block and pressure tested-
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Saturday, October 16th, 2010 AT 4:57 PM

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