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Model specific boards => Golf mk4 => Topic started by: scurbo on 07 August 2009, 18:52

Title: Mayo on underside of oil filler.
Post by: scurbo on 07 August 2009, 18:52

Just got back after a 8 hour trip around manchester area looking at mk3 and mk4 golf gti's. The final one i looked at was a mk4, but i noticed a white residue under the oil filler cap and inside as you looked down. The car ran perfect, nothing unusual, it was a 1999 1.8gti, is this normal, so i know for next time.

Title: Re: Mayo on underside of oil filler.
Post by: Steve_PD on 07 August 2009, 18:54

Could be the head gasket has gone  :undecided:

Title: Re: Mayo on underside of oil filler.
Post by: gtigolfthree on 07 August 2009, 19:00

Yes its water that turns oil white.

Title: Re: Mayo on underside of oil filler.
Post by: Mr_Orange on 07 August 2009, 19:37

Can't it also show up just after a short journey too?

Title: Re: Mayo on underside of oil filler.
Post by: gtigolfthree on 07 August 2009, 19:39

Yes but I think its just condensation that causes that.

Title: Re: Mayo on underside of oil filler.
Post by: johnson6672 on 07 August 2009, 19:40

It doeas happen if the car does lots of short journeys as the engine doesn't get hot enough to burn it off, but you really need to do pressure tests to confirm head gasket or other sinister things.

Title: Re: Mayo on underside of oil filler.
Post by: gtigolfthree on 07 August 2009, 19:46

Yes I wouldnt diagnose a head gasket on one symptom you would need several of the following mayo as mentioned but also white oil(water in the oil), overheating, water consumption, water pressurising, loss of compression/performance etc.

Title: Re: Mayo on underside of oil filler.
Post by: Dubbz on 07 August 2009, 19:56

yeah as said. could be a number of things that cause "mayo".
Two different brands of oil will cause that, as well as condensation, or worst case a head gasket.
What service history did it have?

Title: Re: Mayo on underside of oil filler.
Post by: Stu-1.8T on 07 August 2009, 20:27

My 2.0 has this and it's only on 50k with full history/regular oil changes, but apparently most suffer with it.  Condensation forms as the heat cant escape from the top of the engine quickly enough. 

Title: Re: Mayo on underside of oil filler.
Post by: Ivor Mk4 Turbo on 07 August 2009, 20:50

Money's on condensation if there were no signs of overheating.  Did the temp. guage stick on 90 deg. after a run?

Title: Re: Mayo on underside of oil filler.
Post by: Wurzel on 07 August 2009, 20:56

If you do lots of short journeys it's probably that. Try walking to the shops and see if it clears up. You might lose some weight too. ;)

Title: Re: Mayo on underside of oil filler.
Post by: scurbo on 08 August 2009, 11:39

I didn't stay to find out if it ran hot, no service history and at strong money, is there no decent mk3 or mk4 out there, 4 weeks and 500 miles of distance travelled.

Title: Re: Mayo on underside of oil filler.
Post by: alex160 on 08 August 2009, 11:51

if theres no service history then walk away. There's plenty of decent mk4 gti's out there for around the 3k+ mark. Just need to look harder  :cool:

Title: Re: Mayo on underside of oil filler.
Post by: linz on 08 August 2009, 12:19

i agree alot of them out there you will n when the rite one comes along

Title: Re: Mayo on underside of oil filler.
Post by: allybally on 06 December 2009, 11:23

Found this link and Found the same problem but if you drive it for longer periods of time it stops.
Wife drove for approx 5-6 miles a day and was causing this.

Title: Re: Mayo on underside of oil filler.
Post by: richw911 on 06 December 2009, 13:32

Quote from: allybally on 06 December 2009, 11:23

Found this link and Found the same problem but if you drive it for longer periods of time it stops.
Wife drove for approx 5-6 miles a day and was causing this.

2.0 are known for it  :wink: