[urq] Antifreeze in oil

Ado Sigal a.sigal at bluewin.ch
Sun Mar 7 02:03:46 EST 2004

Your are right, galvanic erosion would do that, but 
I left it out since that problem arises only with 
cars using only tap water for long period of time as 
in some hot countries, which wouldn't be the case in 
US. I wrote also "oil into water", while it should 
be, water into oil. My mistake, the rest stays, the 
engine that is mixing water and oil couldn't be 
running without showing clear signs of what was 
happening. The reason for expecting the compression 
to leak into cooling system before water entering 
oil return passages, is because they are further 
away and additionally protected by the sealer 
strips, while the cylinder has only compression 
seal, which tends to leak first on loose head, 
especially on high comp and turbo engines, while 
water-oil mix happens usually on distorted or 
cracked head and usually after severe overheating. 
The rest unfortunately also stays, unless the mix 
was an established accident, its head off time, I 
hate to say.


DasWolfen at aol.com wrote:

> In a message dated 3/6/04 3:19:21 AM Eastern Standard Time, 
> a.sigal at bluewin.ch writes:
>     Oil has higher
>     pressure than water system, compression to, so the
>     compression should be leaking into water system,
>     which means air locks and overheating, and oil into
>     water, so it is strange if the car was running OK
>     previously.
> Not nessesarily, a gasket leak or corroded head can allow coolant to 
> pass to a oil return passage without putting oil or compression in the 
> coolant system.

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