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I drive a 2012 passat se and I noticed yellow stuff under the oil cap and on the tip of the oil dips

Author : Paso

Submitted : 2018-02-13 05:33:59    Popularity:     

Tags: noticed  yellow  se  drive  passat  

3 months ago my passat was due for an oil change and I made an appointment. 3 days before my appointment the weather here was severe. -12 degrees. I drove home and low oil pressure light came on and then low oil light. I added about half a quart of oil an

Answers:

its a result of worn bores /rings ..its water ..oil and fuel ...proof ? start engine ..run it a few minutes ..then remove oil filler cap ...chuffing whitish smoke?....crankcase compression ...the air fuel mix is passing behind the rings on compression stroke.this is then pushed downwards into sump ..this air fuel oil mix is then replaced on next stroke ..only place to go is upwards ..hence up to rockers ..you never mentioned how many miles on clock ..but its now a 6 year old engine ...and you are very poor on maintenance ...it catches up on you

That yellow gunk, often called "mayonnaise", is indeed an emulsion of oil and water. It is most likely simply a result of the engine not getting warm enough for long enough to drive off any condensation, thus the condensation in the rocker cover mixes with the oil vapour in there and produces this stuff.

It usually results from short journeys not getting the engine thoroughly warm and of course cold weather doesn't help.

It's unlikely it is anything to do with the head gasket, cracked block or the fuel.

That's emulsion from coolant usually getting into the oil through a bad head gasket or cracked cylinder head. It could be condensation, but that should burn off when the engine gets hot.

Run some dry gas in your fuel.



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