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.

Aug 03, 2016 | Nissan Cars & Trucks

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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


You may be having problems with the crankcase pressure regulating valve (PCV). If this is clogged or malfunctioning, pressure can build up inside the engine and blow oil out the filler tube.

Oct 12, 2015 | 2006 BMW 330i

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


Remove oil filler cap which is normally on top of the rocker cover look at underside of cap, the side that goes into rocker cover, and if it is covererd in a white oily substance or if the tube that the filler cap goes into has the white gunge in it yo have oil and water / coolant mixing in your engine

Mar 11, 2015 | 1991 Nissan Pickup

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V6 ENGINE LOSING OIL THROUGH FILLER CAP


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


Well -doing that sort of takes out the PCV System
doesn't it

Unmetered air comes in the oil fill hole & gets drawn into
the intake & leans out the fuel mix

You also got PCV system issues with high vacuum

Jul 17, 2014 | 1997 Chevrolet Tahoe

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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 ?


You have water seeping into you oil, usually a leaking cylinder head gasket. Have it attended to immediately, the contaminated oil is causing other damage while you drive. Sorry to say, but you are looking at a rather pricey repair.

Apr 16, 2011 | Renault Le Car Cars & Trucks

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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.


I would take a close look at secondary ignition. If the problem happens under load (acceleration) I would bet the wires are leaking/bad or the cap/rotor has some carbon tracking. Try spraying down the wires/coil with soapy water and looking for any arcing. Also take a peak inside the distributor cap. you'll be looking for a build up of debris/moisture or carbon tracking which look like black lightning bolts.

Oct 12, 2010 | 1997 Jeep Grand Cherokee

1 Answer

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!! http://www.psa-peugeot-citroen.com/modules/fap/anglais/index.html

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1 Answer

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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2 Answers

I have a 1993 Ford Escort with a 1.9 engine. When I start it I see a cloud of steam like vapor that kinda smells like coolant. I have to add coolant about once a week. The car runs fine, no power loss etc....


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Mar 13, 2010 | 1993 Ford Escort 4 Door

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