Valve stem seals

[Gambit]

180-200psi is 8v compression so you are within the limits just but that could be down to gauge inaccuracy also, fact they are all the same or thereabouts is a good sign

try doing a compression test when stone cold and one when up to temp and see if there is a difference

[bushy123]

Did a stone cold compression test turning over for exactly the same time as the warm 1 readings came back at ( 12.2-12.3-12.3-12.3 ) so slightly less than the warm 1 but I expected that?
I then cleaned all the oil of the rocker cover and had a genural wipe about, and dissided to take it to work on the way I couldn't help but try and brake it so I put my foot to the floor and after a 20 seconds the smoke started flying out the back so I eased off, when I got to work lifted the bonnet to find oil had blown out of the breather thing on the rocker cover and poured down on to the manifold, hence the smoke I guess!!! So any ideas??? Thanks for all the help so far.

[Gambit]

what is the oil level reading on dipstick? you can get a new seal for the rocker cover breather


http://www.golfgtiforum.co.uk/index.php?topic=241972.0

[bushy123]

Fantastic thanks gambit you've been super helpful, do you know if you get any benefits from using 1 of those k&n style breather filters instead of having it feed back into the inlet?

Now I just got sort the bastard vacuum system out, I've got loads of pipes with screws stuffed in them all good fun these old golfs haha!!! 

[Gambit]

the k&n filters dont make that much of a difference, you may get fumes in cabin also. but its an MOT failure to vent to atmosphere so you'd need to swap it back over for MOT unless you've a friendly MOT inspector.

the good thing about old golfs is they are simple to work on!

the vacuum system can be a pain on 8v's as people think theyll gain performance blanking certain parts. good topic here on it showing you the layout

http://www.golfgtiforum.co.uk/index.php?topic=240082.0

[bushy123]

Spot on mate, total legend! I've always had rados, and I've been told the mk2 is very similar ( and they are when it comes to running gear) but not on in the engine bay haha! Won't take to long and I should start to get my head around the little 8v. It's so much fun to drive much more fun than the corrardo.

[danny_p]

compressions are fine.    compression ratio of engine is 10:1   so under cranking  upto 13 bar with a strong starter.

12.6 - 12.7 is pritty good  the variation you mention is nothing to worry about.

just need to work out really if your engine is blowing by and blowing oily crud through the breathers or its getting past the rings,  it sounds like to much smoke for valve stem seals.

is possible the rings may have stuck   there are various snake oils that claim they can help with this or sometimes fresh oil and a good few days of booting it will cure it

[VW BUSH]

Are you losing coolant?

[clipperjay]

12.7 bar is about 180+ psi so its all good average PSI would be around 165-175 depends on age and millage and if the car had work done to raise compression ratio!
Thats assuming you meant 12.7 bar and not 127 psi?

[leigh_harty]

Whats the signs for worn valve guides?