Posted by Mike in Mn. on September 06, 2012 at 07:02:23 from (220.127.116.11):
In Reply to: Water in oil posted by HeyCharger on September 06, 2012 at 01:25:06:
If you are satisfied that it's not the head or gasket and not the o-rings, then it may be a pin hole in a sleeve. There is usually so much goo in the block around the sleeves on an old engine that the o-rings couldn't leak if they wanted to. Sounds like you are getting compression pressure into the cooling system, that means combustion pressure, not a leak. I have seen sleeves crack around the upper flange and leak but its usually visible with the head removed and not on an older engine that hasn't been apart. With the head back on stick an adapter in the plug hole and run a couple hundred pounds of air pressure in each cylinder and see which one blows bubbles in the radiator, good luck.
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