MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Rob GTI on January 08, 2010, 06:40:42 pm
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Just checked the oil today and topped up with about 100ml of oil and noticed a small white mayo like deposit on the underside of the cap. I know this can be the sign of the cylinder head failing and water and oil mixing, although the car doesn't show any other symptons, gets to temp normally, no overheating, no loss of performance, no water loss from the expansion bottle.
What are the other causes, anyone else had any experinces?
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Don,t worry about it, i get it all the time in this cold weather. Its just condensation when the warm oil is cooling down. Take it out and give it a good thrashing and it will go away.
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Yeh seen this a few times, usually when cold or when cars are used for short journeys
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Can be a sign of a Head Gasket failing or can also be caused by doing short journeys, if its short journeys you do I dont think there is anything to worry about...
I am not a expert so you may want to let someone more qualified to confirm
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Just checked the oil today and topped up with about 100ml of oil and noticed a small white mayo like deposit on the underside of the cap. I know this can be the sign of the cylinder head failing and water and oil mixing, although the car doesn't show any other symptons, gets to temp normally, no overheating, no loss of performance, no water loss from the expansion bottle.
What are the other causes, anyone else had any experinces?
I've got the exact same symptoms as you Rob, with residue water in the oil and the un-affected performance + drive.
I wouldn't worry about it, I'm going to monitor mine but not fussed that it's a big problem.
Other than a blowing exhaust mine is in very good health :smiley: I expect yours is probably even healthier being an Ed30 and newer so not a concern really, the cold weather encourages that as Blade rightly says :smiley:
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Reassuring comments guys. Over the past month its not been anywhere near a motorway where it usually spend most of its time, its all been 2 or 3 mile journeys.
I did have it in the back of my mind the revo i had put on a month ago might have had something to do with it but the above comments make more sense.
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Used to get this from time to time but not since I fitted my Catch Can! :happy2:
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i got this on my ed 30 and now on my S3 only a small amount but my car stands unused quite a bit as soon as it goes out for a run its fine , nothing to be concerned about :happy2:
does the catch can stop this ? ive got one sitting on my garage shelf :happy2:
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Used to get this from time to time but not since I fitted my Catch Can! :happy2:
Same here :smiley:
The catch can removes the moisture from the oil so no mayo under the oil cap.
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I've just put about 250ml of Castrol Edge in mine as the oil gauge was halfway between min and max. The sludge i had under my oil cap was yellowy-green not white. I've not been on a long run for a while due to winter and each work day do a 10 mile drive to/from work, albeit about 6 miles on a motorway.
The car has done nearly 14k miles (May 08) and was last serviced May 09.
I assume this too is nothing to worry about.
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I hear from a few other forums that it is just condensation caused by weather and short trips, if you have this on your dipstick it may be more serious!
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No sludge on the dipstick :happy2:
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or mine.
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Me three either.
I also had a look around the engine in the light with a powerful torch and there's no oil splashes or residue underneath, or in the engine bay. Even more reassurance it's not a broken component I suppose.
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I've just put about 250ml of Castrol Edge in mine as the oil gauge was halfway between min and max. The sludge i had under my oil cap was yellowy-green not white. I've not been on a long run for a while due to winter and each work day do a 10 mile drive to/from work, albeit about 6 miles on a motorway.
The car has done nearly 14k miles (May 08) and was last serviced May 09.
I assume this too is nothing to worry about.
it is that colour with edge oil esp if the oil is fresh :happy2:
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If your head gasket has failed you won't have compression in one or more cylinders.
This is a picture of the milky deposits from my car this winter:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Ffarm3.static.flickr.com%2F2753%2F4213496503_d3ae61a25c_b.jpg&hash=6aad427acdaab4596b86912cf72126757f90dcc3)
This is the first winter where I've noticed it; I think the unusual cold must be a causative factor.
The US forums have been reporting this for a few years now, nothing to worry about.
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(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Ffarm3.static.flickr.com%2F2753%2F4213496503_d3ae61a25c_b.jpg&hash=6aad427acdaab4596b86912cf72126757f90dcc3)
Is it me or does it look like a Ninja or SAS op is checking your oil. :signLOL:
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And what strange milk you must drink because it looks yellowy to me!
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If your head gasket has failed you won't have compression in one or more cylinders.
This is a picture of the milky deposits from my car this winter:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Ffarm3.static.flickr.com%2F2753%2F4213496503_d3ae61a25c_b.jpg&hash=6aad427acdaab4596b86912cf72126757f90dcc3)
This is the first winter where I've noticed it; I think the unusual cold must be a causative factor.
The US forums have been reporting this for a few years now, nothing to worry about.
i dont get that much , only a trace :wink:
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Is it me or does it look like a Ninja or SAS op is checking your oil. :signLOL:
:signLOL: that's my full arctic circle getup :D
...and if my milk was that colour rest assured I wouldn't drink it!
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Got a bit under mine.Only a 14 mile round trip to work & back & the temp gauge never even gets to half way at the moment.
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Checked mine this afternoon and its pretty much similar, just a bit on the cap and housing. Nothing on the dip stick or sump so nothing to worry about :smiley:
The catch can is catching a fair whack of moisture so it's doing its job :happy2:
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fitted the new MAF sensor today, and checked the oil level at the same time had a look at mine this afternoon,
the dipstick level was good, as was the colour of the oil on it.
checked the filler cap and was pretty horrified at what i saw.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi756.photobucket.com%2Falbums%2Fxx202%2Fsimonskerton%2FSDC10824.jpg&hash=d98d92a086099a99357b9ccb9026a542cc89aed1)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi756.photobucket.com%2Falbums%2Fxx202%2Fsimonskerton%2FSDC10823.jpg&hash=21b9f35f791546051f741078be65685e928d32e1)
Now this last month the car has only done 170 miles, the large majority of which have been very short journeys.
Iike dropping my wife to work ‘2 mile round trip’, then picking her up after another 4 hours. Both times the car starts off as cold, and will have just got up to temp by the time i get back home.
anyway i cleaned all the gunk off the filler cap and the inside of the filler pipe and went out for a 15 mile drive to keeping the revs above 3500rpm.
After the drive the gunk seems to be mostly gone from the lid, and seems a lot better in the filler pipe
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi756.photobucket.com%2Falbums%2Fxx202%2Fsimonskerton%2FSDC10866.jpg&hash=4b6c7fcb5928346467d8ede108d19ad279526c72)
I have a bit of paranoia now that it could be a head gasket, however the coolant level hasn’t dropped, and also my car is in for its second service (29K) on Wednesday.
I have noticed my MPG has been rubbish recently, I out it down to th e short journeys though.
Could this cause a problem. I dropped my filler cap a while back and the top cracked. As you can see in the top of the cap, there is a small hole there. Could that cause a problem maybe allowing moisture into the oil??
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi756.photobucket.com%2Falbums%2Fxx202%2Fsimonskerton%2FSDC10863.jpg&hash=df6bdc38279d494898b463295589030db71577b2)
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I to was a little bit horrified to see all that gunk but as others have said its not a problem, just a consequence of all this cold weather we are having of late.
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As above mine has been the same through the last 3 winters - nothing to worry about, soon burns off when it gets warmer
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Mine has been like yours lately sy
but the Missus has only been doing short trips in it to and from work.
I get it every year and it's no different with the catch can despite the amount of water i empty every 1k miles or so.
I really wouldn't worry unless you start seeing coolant levels changing and dipstick oil starting to be gunky
Carl :happy2:
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VRSY, I would not be too worried, like you said the mayo is probably consequence of lots of short journeys, cold starts, cold weather and the engine not having a chance to warm up properly.
The reason the mayo forms is due to moisture getting into the engine. When the engine is cold the moisture at the top of the engine around the oil cap does not get heated up enough to turn into vapor so it mixes with the oil hence causing the mayo effect. Therefore that hole on the oil cap will not help so I would get a new cap if I were you. Also consider getting a catch can as they really do filter most of the moisture out of the engine.
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KRL, that is with the catch can as well. i have a feeling that as the oil is 12k old now, its probably not helpinganyway.
cheers for the help guys, i have seen mayo on the filler cap before after short journeys etc, but never as thick as that
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KRL, that is with the catch can as well. i have a feeling that as the oil is 12k old now, its probably not helpinganyway.
cheers for the help guys, i have seen mayo on the filler cap before after short journeys etc, but never as thick as that
12k same oil - i change mine every 5k.
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12k same oil - i change mine every 5k.
same here! :happy2:
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when i was in germany i never did short journeys, they were always long journeys on dual carriageways etc. now im back in uk i do a quater of the mileage i did before and its 90% short journeys, so now i will be changing oil much more frequently