QuestionQUESTION: hi,
i had an oil change done today on my 2002 jeep liberty limited 3.7l v6 as scheduled.vehicle has 148,000kms. We found out that there is build up of yellowish stuff on the inside of the cap where the engine oil is poured into the engine. also around inside of the pouring spout. it looks like coolant, but not sure. looks like coolant has mixed with the oil. The engine was also flushed clean. Can u please tell me what this stuff is and what's the danger it is for the engine and what can be done to fix it.what do u recommend/advise me to do...engine has not overheated. this is the first time this problem was found. i am very worried about this. please get back to me.
thank u very much.
ANSWER: its moisture from inside the engine its normal 3.7 and 4.7 oil caps have it all the time.
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QUESTION: ok, bro thanks so much.
I understand but how does the moisture get in the engine?
however, if the oil and coolant happen to mix up within the engine, what does it look like, or what appearance does it have. How do i know that the coolant has mixed with the oil? is there a way for me to find out? please get back to me.
thanks....i really appreciate the answers.
Answer2 parts first part basic laws of nature there is always water in the air correct? Air is inside your engine oil area so when it heats up the water will turn into steam and it rises up to the top on your car the highest point is the oil cap and u get some that collected on the oil partials that attach them self to the top of the cap then u get the oil and water mix and it looks yellow.
part 2 if u have water in the oil from a head gasket leak the oil out of the dip stick tube would also be that same color all of it.
