I recently changed me exhaust and decat on my gti 6 but noticed it starts smoking when warm
Got me bit worried as I've just put a a new head on
Did a quick compression test with throttle closed and they were all on the 50 psi mark
I'm sure that's not good
Car runs good no lose in power just smokes when warm
Shall I be worried

I did find some oil in and around inlet and Thorttle few week ago when I took inlet off too change starter I'll put catch tank on see if it clears

I'll give it another go with throttle open see if compression jumps up

Probably worn bores /rings / pistons. Common on these engines.

Leak down test would be better.

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Nothing to see here

Mines about 15 years old, only puff of smoke is on very hard boot

I thought they should be more like 200-220

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andrew315rawson@live.co.uk
Moonstone phase 7 gti6
My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1

Liking the edits recently buzz

Piston rings, valve stem seals?

My engine is coming up for 190k, although it still makes power, one of my cylinders is a fair bit down, after a good hard run my dipstick pops out, when i previously had a catch tank there was ALOT of vapour coming out of the vent and the tank would collect nearly half a litre of oil after say an hours worth of hard driving, i now have my breathers plumbed back in as normal as the the cabin would be smelling of oil when the engine was hot.
If your compression is down it could well be that you have excessive bore wear/worn rings which in turn will pressurise the crankcase/sump therefore blow through into your throttle body. I would do another compression test but this time with throttle wide open and then do a leak down test. The leakdown will give you some obvious clues as to why you are down on compression.
Out of curiousity did you replace the head because it had been badly over heated, if so, excessive heat can cause the piston rings to lose their tension and hence not seal properly and cause the above

Although you might not have felt a wear ridge at the top of the bore they could be out of round further down on the thrust face. Try pulling the breather from the cam cover to see if theres excess vapour, seriously though, leakdown test is the way to go.