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1997 Cutlass Supreme



 
 
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  #1  
Old June 26th 06, 10:11 AM posted to rec.autos.tech
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Default 1997 Cutlass Supreme

1997 Olds Cutlass Supreme 3.1 V6 approx. 90,000 miles
In about 6 months three times the car overheated, the radiator overflow tank
bubbled out, temp gage went up to red etc......I let it cool, topped off
with antifreeze/water and for the most part it went back to normal.
Previously I had replaced aging dexcool anti-freeze and because the stuff
had "jelled" some (no overheating problem at that time) I used a radiator
cleaner etc. (I eventually cleaned and replaced fluid twice). During the 6
months I replaced the thermostat and had a water pump go out. In those
months we did several long trips of a couple thousand miles and used it as
our daily driver.....Then for the last overheating adventure I had some
steam out of the exhaust and water in the oil. Now I've torn it down and
more or less as expected found a bad lower manifold gasket (leaking water
into the manifold)......I pulled the heads and the gaskets were fine....
presently a machine shop is testing them......While the manifold gasket
addresses the current "chocolate milk oil" I don't see how it addresses the
earlier apparent "exhaust gas leaks" into the cooling system.

If the heads check out any best guesses?

When reasembling any hints or tips?


Thanks Rod


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  #2  
Old June 26th 06, 02:16 PM posted to rec.autos.tech
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Default 1997 Cutlass Supreme

I don't see where and how you determined the exhaust gas leaks in the post.
"Rod & Betty Jo" > wrote in message
...
> 1997 Olds Cutlass Supreme 3.1 V6 approx. 90,000 miles
> In about 6 months three times the car overheated, the radiator overflow
> tank bubbled out, temp gage went up to red etc......I let it cool, topped
> off with antifreeze/water and for the most part it went back to normal.
> Previously I had replaced aging dexcool anti-freeze and because the stuff
> had "jelled" some (no overheating problem at that time) I used a radiator
> cleaner etc. (I eventually cleaned and replaced fluid twice). During the
> 6 months I replaced the thermostat and had a water pump go out. In those
> months we did several long trips of a couple thousand miles and used it as
> our daily driver.....Then for the last overheating adventure I had some
> steam out of the exhaust and water in the oil. Now I've torn it down and
> more or less as expected found a bad lower manifold gasket (leaking water
> into the manifold)......I pulled the heads and the gaskets were fine....
> presently a machine shop is testing them......While the manifold gasket
> addresses the current "chocolate milk oil" I don't see how it addresses
> the earlier apparent "exhaust gas leaks" into the cooling system.
>
> If the heads check out any best guesses?
>
> When reasembling any hints or tips?
>
>
> Thanks Rod
>
>




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