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Oil in cooling system on 1850, any ideas ?

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Jim Mc.

06-11-2001 07:35:47




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We've been having a problem with oil getting in the anti-freeze on our 1850 ,it has a Perkins 354 and otherwise runs good.Things we have tried so far are,bypassing 2sp. oil cooler, replacing engine oil cooler and replacing cylander head.Oil is still getting in there and I'm running out of ideas.Would like to hear from anybody who might have any new ideas.Thanks




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A Berling

06-17-2001 05:21:40




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 Re: Oil in cooling system on 1850, any ideas ? in reply to Jim Mc., 06-11-2001 07:35:47  
I'm having the same problem so I'd appreciate any information you receive on this ad.
Also, I'm looking for a carburetor for a Cockshut 1850. Any idea of a possible source?
Thank you.



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vern in ne ks

06-12-2001 11:36:08




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 Re: Oil in cooling system on 1850, any ideas ? in reply to Jim Mc., 06-11-2001 07:35:47  
Had an 1850 for 34 years. The Perkins is a dry sleeve engine, know this for a fact, replaced them twice. I know you stated that the engine oil cooler was replaced, are your sure this one is OK? I had to replace ours once. I would suggest plugging the oil cooler and see what happens, I'll bet it's your problem.



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Gary

06-11-2001 19:42:39




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 Re: Oil in cooling system on 1850, any ideas ? in reply to Jim Mc., 06-11-2001 07:35:47  
A cyl. leak down will not show oil getting into radiator. If this was your problem you would have water blowing out ex. when started, or it would be building up pressure in rad. This test test will only check head gask and cyl. head for water or air leaks. If I remember right these 354 perk. have dry sleeves which do not have water or oil around them.



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Bill

06-11-2001 14:50:11




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 Re: Oil in cooling system on 1850, any ideas ? in reply to Jim Mc., 06-11-2001 07:35:47  
One thing that we have run into before is a problem with the engine block. When they drilled the oil gallery, they drilled it from both ends of the block. For some reason, one of the drills must have walked and got into part of the water jacket or at least close to the water jacket. We had been getting oil in the water and could not figure out where it was coming from. We did all the things that you were talking about and that is what we finally found. Just another idea.

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Dean

06-11-2001 08:54:12




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 Re: Oil in cooling system on 1850, any ideas ? in reply to Jim Mc., 06-11-2001 07:35:47  
Do a cylinder leakdown test. It will show where the leak is. My guess is that it is between an oil gallery and water jacket. The oil @ 40-50 psi overcomes the pressure of the cooling system @ 15 psi.



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Jerry B

06-11-2001 12:12:08




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 Re: Re: Oil in cooling system on 1850, any ideas ? in reply to Dean, 06-11-2001 08:54:12  
what????? ? are you sure???? you mean applying air pressure inside the cylinder is going to reveal an oil leak between a oil galley and the water jacket? I only used them to check the relative condition between rings and cylinder walls.



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Dean

06-11-2001 13:34:30




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 Re: Re: Re: Oil in cooling system on 1850, any ideas ? in reply to Jerry B, 06-11-2001 12:12:08  
A cylinder leakdown test (NOT a compression test) can show many problems. Bubbles in the radiator, for example, might mean a torn head gasket. He has already replaced the head so I would use a leakdown test here as a way to exclude any other problem. If there is no other way for the oil to get into the coolant, then my guess, which I hope for his sake is wrong, might be the answer.



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Jerry B

06-12-2001 08:57:33




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 Re: Re: Re: Re: Oil in cooling system on 1850, any ideas ? in reply to Dean, 06-11-2001 13:34:30  
Been there. Done that. Cylinder leak down WILL NOT show a thing about the oil galleys. Oil is being pumped into the coolant. NOT vice versa.



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Dean

06-12-2001 10:04:47




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 Re: Re: Re: Re: Re: Oil in cooling system on 1850, any ideas ? in reply to Jerry B, 06-12-2001 08:57:33  
Jerry, reread my post. I said I would use a cylinder leakdown to EXCLUDE all other possibilities before suspecting a cracked block which is the most likely way oil would contaminate the water jacket.



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