1994 Grand Prix over heating

Tiny
SMJCA
  • MEMBER
  • 1994 ALL OTHER MAKES ALL OTHER MODELS
I have a 94 Grand prix V6. I noticed a few weeks ago that the temp would start to climb then drop back to the normal range. I was thinking the thermostat, but the weather got too bad to take in to get fixed. Last week I noticed the heater would not blow out warm air and the temp would stay close to the red zone if I was stopped. This was on a Wednesday. I had an appointment to take it in on Friday. Thursday, it began getting hot again and acting like it was cutting out. I stopped to check the antifreeze. It was empty, but could not find any leaks. I drove a short distance home. Next morning, I started the car and got half a block from the house. The car started the same thing. It made a small knocking sound and white smoked rolled out of the exhaust. I have been given a couple of answers. 1. Threw a rod. 2. The car does not knock until it temp rises. They told me not a rod but too much oil. Oil looks clumpy. And where is my antifreeze going? Other than shooting it. Can you help me?
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Sunday, January 28th, 2007 AT 6:42 PM

4 Replies

Tiny
JEFTFIELDS
  • MEMBER
SOUNDS LIKE YOUR ANTI-FREZE IS ALL GOING IN YOUR ENGENE, THROUGH YOUR HEAD GASKETS, IF YOU DONT HAVE ANY LEAKS OUTSIDE YOUR MOTER IT MUST BE GOING IN.
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Sunday, January 28th, 2007 AT 6:50 PM
Tiny
SERVICE WRITER
  • EXPERT
What motor>

The 3.8 and 3.4 are infamous for intake manifold leaks. Not to down play the head gaskets, but not very common on these ones.
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Sunday, January 28th, 2007 AT 6:57 PM
Tiny
JEFTFIELDS
  • MEMBER
SERVICE WRITER IS RIGHT I MENT INTAKE NOT HEADS.
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Sunday, January 28th, 2007 AT 7:01 PM
Tiny
SERVICE WRITER
  • EXPERT
Yeah, yeah, all you Jetfields are all alike :lol:
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Sunday, January 28th, 2007 AT 7:03 PM

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