I think you were fed a line of crap. My money is on this.... you've got an engine with a bad head gasket that's turned the coolant into a black froth that looks like oil. Shave the head, chase the head bolts and otherwise check for cracks in the head... and put it back together.
Cavitated blocks represent themselves with coolant in the base, not oil in the coolant.
Re: 10 series 201 - oil in the water in reply to RodInNS, 03-05-2014 20:56:30
I talked to the old machinest today and he stands by his statement that they will push oil into the water from near the main bearings. He fixed several of them. I still don't understand where it happens. I'm going to go up there to drop off a crank to be ground and head to be done one of these days and will talk to him about it more. Now fellas, before you jump on me about this remember I'm going on hearsay and not quoting facts. But I think it's worth exploring anyway. He did say he doubted there could be anything in that BSD engine that he couldn't fix and agreed it would be worth buying if only for parts. If the price is right of course. It's on the back burner for now, along with other things.
Re: 10 series 201 - oil in the water in reply to Ultradog MN, 03-06-2014 18:17:47
The 'hearsay' factor was my main consideration when I suggested that it's probably a head gasket... If you or Bern had said that it has 'oil in the jacket'... I'd take that as good. I've lost count of all the times over the years that someone either on here or locally has said to me that their engine has oil in the water only to find out it's nothing more than a blown fire ring on the gasket. I've had probably 3-4 of them on my own stuff.
I would take with a healthy dose of skepticism the assertion that the main oil gallery can cavitate into the water jacket.
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