Need Ur Help..Video Of my car while smoking on deceleration..

[Mego]

Hi There,,
been trying to figure out my car problem before start to work on my engine..turbo is fine after being checked by 2 turbo guys..did a full pcv delete and didnt help..hope u can help me before i start to change valve stem seals as its the most possible cause as i have been told..

compression test is done and done all all ok..dry starting cyl1 153,150,150,148 wet 160,160,165,157

here is the video

Thank you.

[pudding]

Compressions are a little low, but not horrendous.  Around 180-190psi on a new engine.

That does look like classic valve guide wear.  Loads of over-run, followed by smoke when back on the gas.  That isn't a lot of smoke though.  I bet a lot of GTIs do that on such long hills and people don't realise.

[Mego]

Thx for ur answer..my smoke issue started after fitting a catless dp and going stage 2 remap..seems oem dp was hiding smoke..why u said guides not seals?

[ROH ECHT]

There are both seals and guides on the valve stems.

Valve stem guides:



There are seals for both intake and exhaust valves. The exhaust valves get hotter and their seals differ from the intake seals to withstand the extra heat:

[GTI-MATT]

Any update/fix with this problem mate?

[jez_monkey]

Any update/fix with this problem mate?

What he said - my jetta has started doing this just after fitting a de-cat exhaust system