| [ Total Views: 551 | Total Replies: 10 | Thread Id: 10030 ] |
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 breville
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 posted on September 4th, 2003 at 10:05 AM |
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Blue Clouds !!!
HI there
I have a 1600 TP
often when I start it after it has been sitting for a few hours or more - I get a cloud of blue smoke
Then it runs fine after a minute
any clues?
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 Bizarre
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| posted on September 4th, 2003 at 10:16 AM |
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It happens 
Mine does it if i park driver front wheel lowest. And then only when people are standing near. Did it more in summer come to think of it. I posted
something about it stopping when we had a cold snap just befoe winter.
Try a thicker oil - see if that makes a difference. I run a thin straight 30W
Probabally getting oil past a guide.
A lot of VW's do it.
IF it does it ALL the time i would worry ..... occasionally ..... well live with it.
I know of many fresh rebuilds that still do it
Futue te ipsum!!!
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breville
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| posted on September 4th, 2003 at 10:21 AM |
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Thanks
yes it is most embarassing when trying to impress:o
it is parked on a slope most of the time
not much i can do about that
thanks for the reply
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Baja Wes
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| posted on September 4th, 2003 at 10:42 AM |
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It is because of the flat layout of the VW motor.
When it is parked on a slope, the oil will run past the back of the pistons and settle in the combustion chamber. It will then burn off when
started.
It is not clear whether it comes from the sump level itself being higher than the bottom of the cylinder, or just the oil on the cylinder walls
running into the combustion chamber. The result is the same. The solution is to not park on hills.
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Bizarre
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| posted on September 4th, 2003 at 10:45 AM |
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OK _ so you reckon it is comming from the bottom of the motor rather than the top.
That would explain mine a bit better. I thought my heads were fine. My P&Cs i know are ..... well........ cost effective
Futue te ipsum!!!
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Baja Wes
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| posted on September 4th, 2003 at 11:25 AM |
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it'll happen no matter how good your cylinders are. Piston rings are designed to scrape oil, not completely seal against it.
The same prob will happen to a normal car if you roll it on it's roof and leave it there for a while.
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LOWBUG
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| posted on September 4th, 2003 at 10:04 PM |
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Blue Smoke
Geee come on guys it could be as simple as oil running down through valve guides and burning on start up, just sounds like an old engine that needs
the head, done.
All old cars or engines do it
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Grey 57
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| posted on September 4th, 2003 at 11:05 PM |
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My bet would be valve guides too. Puff of oil smoke on start up is usually the symptom.
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Baja Wes
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| posted on September 5th, 2003 at 08:17 AM |
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| Quote: | Originally
posted by LOWBUG
Geee come on guys it could be as simple as oil running down through valve guides and burning on start up, just sounds like an old engine that needs
the head, done.
All old cars or engines do it
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Old normal cars do it because their valves are vertical. Oil doesn't run down horizontal valves.
Besides, worn valves will give puffs of blue smoke while your driving too.
Trust me, it's the parking on angles thing. No matter how freshly reconditioned my motors were, they all did it if I parked on a side angle.
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Brad
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 posted on September 5th, 2003 at 09:41 AM |
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I hate to say it but I agree with Baja Wes
Now I have been away from VW engines for a few month now and could be going silly but wouldn’t it need to be a very serious slope to get enough oil
into the tappet covers to reach the valve stems and then run down into the chamber whist sitting ?
I have a brand new Type 1 and it will puff blue smoke if I park it on a Baja for to long due to the angle of their roof. Although it does have 92mm P
&B set so according to Wes they will be stuffed now as they have 2000km on them .
Back to the case at hand. I agree with Wes it is getting by the pistons as the sleeve sits very close to the oil level. If rings stopped all oil then
barrels would run dry and seize.
I wouldn’t worry about it unless it is constant or you are starting to use heaps of oil. Next thing you know you will be trying to stop oil weeps
from the case.
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Bizarre
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| posted on September 5th, 2003 at 10:56 AM |
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| Quote: | Originally
posted by Buggy BradNext thing you know you will be trying to stop oil weeps from the case.
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You have oil weeps from the case - WOW!
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:Must be a water cooled D
Futue te ipsum!!!
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Brad
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| posted on September 5th, 2003 at 02:54 PM |
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I wish
 I wish, my water cooled don't leak a drop. The 2020 on the other
hand likes to marks its ground. I have been told adding some tappet cover gaskets may stop this though.
I leave it as it is cause the most it has ever dropped it 2 drops when I first park it there. Saves me checking the level.
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geodon
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| posted on September 7th, 2003 at 04:45 PM |
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I diagnose worn valve guides by the rattle & by creating a high vacuum situation & watching the exhaust. This happens by accelerating hard
then going on the over-run. The resulting high vacuum in the inlet can suck oil down the valve stem to be burntif the guide is worn.
In this case it appears to be the usual boxer characteristic of oil seepage past the rings. My BMW R80RT does it as well!
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