1999 Pontiac Sunfire OVERHEATING AND DONT KNOW WHY

PEGGY66

MEMBER
1999 PONTIAC SUNFIRE
6 CYL
2WD
AUTOMATIC
20,000 MILES

ITS OVER HEATING AND WE HAVE PUT WATER PUMP, TERMASTAT, TEMPERCURE COOLING SENOR SWITCH, AND IS STILL RUNNING HOT. THERE IS NO WATER IN THE OIL. AND AFTER IT RUNS AND GETS HOT THERE IS A RATTLE THAT SOUNDS LIKE A PULLY FIXIN TO COME OFF. PLEASE HELP ME

Saturday, August 28th, 2010 AT 6:56 PM

6 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

Is it overheating at highway speeds or more in slow traffic situations?
What is the history on this?

SPONSORED LINKS

Was this

answer

helpful?

Yes

Saturday, August 28th, 2010 AT 6:59 PM

PEGGY66

MEMBER
4 POSTS

IT OVER HEATS IN TRAFFIC AND OPEN ROAD. IT STARTS TO OVER HEAT LIKE 10 MINUTES AFTER IT STARTS AND THEN WITH THE RATTLE

Was this

answer

helpful?

Yes

Saturday, August 28th, 2010 AT 7:17 PM

WRENCHTECH

MECHANIC
20,761 POSTS

You still didn't tell me anything about the history so I have to assume you have overheated it numerous times by now. This mean the likelihood of it have a blown head gasket is real high. All it takes is getting too hot once. You don't have to find anything in the oil for the combustion to be getting into the cooling system. I suggest you have a chemical test done to it.

Was this

answer

helpful?

Yes

Saturday, August 28th, 2010 AT 7:20 PM

PEGGY66

MEMBER
4 POSTS

IT NEVER GOT OVERLY HOT. WHEN THE GADGE WAS GOING UP I WOULD TURN THE HEATER ON AND WOULD BRING IT BACK DOWN TO WHERE I COULD GET HOME. AS LONG AS THE HEAT WAS ON IT WOULD BRING THE TEMP DOWN. AND WHAT IS A CHEMICAL TEST AND WHERE DO YOU GET ONE OF THOSE AT?

Was this

answer

helpful?

Yes

Saturday, August 28th, 2010 AT 7:26 PM

PEGGY66