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-   -   '73 Olds 350 Oil in coolant no coolant in oil :( (http://www.hotrodders.com/forum/73-olds-350-oil-coolant-no-coolant-oil-202724.html)

DQ81 07-26-2011 07:33 PM

'73 Olds 350 Oil in coolant no coolant in oil :(
 
it's an Olds 350 engine.

Doesn't smoke one bit. Runs sweet.

Got oil in the water. I've only run this engine about 300 miles since I've owned it and only found this as the upper radiator hose sprung a leak.

It's an auto so my wishful thinking points me to internal radiator leak (trans fluid) Can't really tell if the trans is seeping oil into cooling system as it leaks around the pan and on the output shaft!

There is not a single trace of water in the oil anywhere. No overheating or cooling issues, no loss of power, no smoke, no rough running. It's a pretty agressive little olds in fact!

Could this be a headgasket? Cracked head? Oil runs at higher pressure in the internal passages doesn't it?

It's greasy stuff, but brown, it doesn't give the rainbow effect oil does with water and it's lumped together. Maybe it's just one of those bottles of radiator crap someone put in?

I'm clutching at straws...

Who is very familiar with these engines?

FmrStrtracer 07-27-2011 07:49 AM

Have you flushed the cooling system?

The only path for oil into the radiator would be thru the trans cooler.

If you had a blown head gasket, cracked head or block, you would have coolant in the engine oil, not the other way around.

Drain the radiator, flush with a good coolant system cleaner, refill with straight water, drive, re-check for oil in the cooling system.

BLKSVT 07-27-2011 07:51 AM

^^^^^agreed

DQ81 07-27-2011 07:55 AM

Quote:

Originally Posted by FmrStrtracer
Have you flushed the cooling system?

The only path for oil into the radiator would be thru the trans cooler.

If you had a blown head gasket, cracked head or block, you would have coolant in the engine oil, not the other way around.

Drain the radiator, flush with a good coolant system cleaner, refill with straight water, drive, re-check for oil in the cooling system.

\

that's what I was thinking! I'm flushing it asap and putting an external trans cooler on and checking the trans fluid today.

DQ81 09-28-2011 07:46 PM

Quote:

Originally Posted by DQ81
\

that's what I was thinking! I'm flushing it asap and putting an external trans cooler on and checking the trans fluid today.

Put external cooler on after flushing out transmission, changing filter and put new atf in obviously.

Flushed coolant. Lower radiator hose sprung a leak today. Fixing it tomorrow. Other than that all is good again.

Internal leak in the rad, go figure.

Thanks all!


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