1998 Nissan Sentra Water in engine oil

JBOY52

MEMBER
1998 NISSAN SENTRA
4 CYL
FWD
MANUAL
121,000 MILES

My Nissan Sentra GA14 engine (1998 model - fuel injection) was repaired for the second time because of water in engine oil. (The first was not successful). The head gasket was replaced, new water pump was replaced, sealed well the timing chain cover, oil and filter were changed. The engine was tested for more than 2 hours including the road test. Checked the oil and water after the engine cooled down and everything is fine. Oil was not contaminated. A Road test was done again for 20 minutes. The following morning before starting the engine I checked again the oil and it was ok. But after using the car for a 10 minute trip, the oil becomes milky again. The engine is not overheating and it's running very smoothly. There's again water in engine oil. Is it possible that it is caused by a defective intake manifold gasket. There's also water coming out of the tail pipe. Please help.

Monday, October 12th, 2009 AT 8:19 PM

1 Reply

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

Water in the oil would indicate one of two things, a very badly blown head gasket, and as you say it runs well this will not be the case, the other cause will be a cracked head, cracked blocked are very rare indeed. When the head gasket was done did you get the head crack tested and pressure tested, checked for warp and straightened if required, and then re faced? These are all vital tests that should be done on every head that is removed.

Mark (mhpautos)

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Tuesday, October 13th, 2009 AT 5:37 AM