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Ford Tractors Discussion Forum

Engine oil in radiator

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Author  [Modern View]

11-05-2019 10:47:35

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I've come to wits end and need help. I am working on a three cylinder Ford diesel engine. The owner brought it to my shop for him to change the engine oil and filter. He did that and we discovered a anti freeze leak at a hose, tightened the clamp and fixed that. When checking the level of anti freeze we discovered it was full of motor oil. I thought it had to be the oil cooler so we bypassed it flushed the system and thought it was done. Next day I started the engine to get the new anti freeze moved around so I could check the protection level. I had to add anti freeze as it was low. I also checked the oil level and found a crank case full of anti freeze. Now we had run the engine the day before and the oil level was check several times, all was okay.
Does anyone have any thoughts on how this could happen?

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11-06-2019 05:53:48

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 Re: Engine oil in radiator in reply to shopforman, 11-05-2019 10:47:35  
Not the first time I ve heard about the oil galley having a leak into the coolant. I know of two for certain, one in a 7700, had a hard life and eventually crack inside and pushed oil into the cooling system. The other happened to my local automotive machine shop buddy who unfortunately discovered it after all the machine work had been done. He was able to successfully install a sleeve in the oil galley to seal the crack.

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11-05-2019 18:03:21

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 Re: Engine oil in radiator in reply to shopforman, 11-05-2019 10:47:35  
Neighbor had that happen on a three cylinder diesel ten hours after engine overhaul, his sprung a leak from the oil gallery into the coolant..

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Sean in PA

11-05-2019 11:08:00

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 Re: Engine oil in radiator in reply to shopforman, 11-05-2019 10:47:35  
Two possibilities are blown head gasket or pinholes in the cylinder walls from cavitation

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