Question about Toyota Highlander

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When oil filler cap is removed and you look inside it looks like carbon build .is this some sort of oil debris catcher or do i have problems. 20000miles

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I don't think you need to worry. I just purchased a 2003 highlander with 63,000 miles and noticed the same thing. So last weekend I pulled the camshaft cover and it was clean and beautiful under there. Absolutely NO sign of sludge or carbon build up.

Posted on Aug 14, 2008

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Carbon buildup try to do our oil change sooner normally its old oil no problem there but do oil change every 5000 km hope it help fixya our problem thank you pierre

Posted on Aug 03, 2008


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Posted on Jan 02, 2017

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Pcv valve I changed the head gasket in my 2002 Nissan Altima 2.5s and did a oil change and I had the oil filler cap off when I started it and it oil came out the filler

Oil supply to the overhead camshaft and valve gear is fairly vigorous and so some spray from there is to be expected without the filler cap.

Unlikely a problem with the pcv valve - they rarely give trouble unless seriously gummed up with carbon-type deposits and then a thorough clean mostly restores them.

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I have a bmw 330i 2006 and i have oil coming out of the oil filler cap thats on top of the engine what could be the problem because the cap it self looks fine and tight

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How can I be sure my problem with my 1991 Nissan pickup is oil mixing with coolant

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The obvious answer would be to replace the filler cap. But I would look int why so much pressure is building under the valve cover. A Chilton/Haynes manual should give you some answers under the trouble-shooting heading.

Sep 23, 2014 | Cars & Trucks

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Why on my1997tahoe when you remove the oil filler cap truck will stall and lots of suction

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Hi, I have a renault clio 1.2 and there is a constant build of "mayonnaise" type oil inside the filler cap. Water never needs topping up, not sure what's going on ?

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My 97 JGC is acting up it rides fine once it gets a good take of but it is putting like it is losing gas pressure at times and acts like it wants to cut off. Fuel pump replaced.

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Hi, I have a peugeot 807 & shortly after I had the water pump changed the Antipolution warning started cumming up & the motor shakes like its about to jump out of the car,black smoke,higer fuel...

the 807 uses an additional small tank of additive which needs to be checked refilled to basically burn off the carbon build-up in the exhaust chamber this is linked to the filler cap sensor if the ceramic in the exhaust is clogged then damage can result from continuning to drive the car check this site for how it works mine cost 400 euros to sort!!

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I drive an 2005 F-350 with a 6.0 diesel. I noticed a whining noise a few days ago that would come and go. on monday the noise came back with a loss of power, boost gauge jumping around, overheated and lost...

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