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Tractor Talk Discussion Forum

Cat. D4D water in the oil

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Tony

07-25-2004 22:28:17




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I am told a Cat d4d has wet sleeves with o rings installed between the sleeves and lower block that can fail from overheating, age, or both, allowing water or coolent to get in the crank case.

Coolent was thought to be entering the engine around the injector bosses that thread into the head that also have o ring seals, hence the head was completely reworked and pressure tested at a reputable machine shop and given a clean bill of health.

The head was reinstalled to cat. specs., the engine fired right up and ran quite well but upon further inspection the dip stick appeared to have been removed from a milk shake.

Any and all information or suggestions regarding this condition will be greatly appreciated.
Thank You.

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Ron

07-26-2004 04:49:43




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 Re: Cat. D4D water in the oil in reply to Tony, 07-25-2004 22:28:17  
The engine has to come apart not just to replace the liners/seals but to inspect the bearings and crank journals. Coolant quickly destroys bearings/journals.

To add to your list, failure to replace coolant often enough can lead to seal failure as old coolant becomes slightly acid.



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sibby(Aus)

07-26-2004 03:57:06




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 Re: Cat. D4D water in the oil in reply to Tony, 07-25-2004 22:28:17  
Tony, Does it have an engine oil cooler, best to check it first as it is easier to remove and test than a head. The oil pan will have to be removed to see if your o,rings or sleeves are leaking coolant into engine oil. cheers, sibby.



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