MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: vag12 on March 20, 2014, 12:24:43 pm

Title: Engine oil found on spark plug
Post by: vag12 on March 20, 2014, 12:24:43 pm

Last night I was having bad misfires so took it to garage this morning to change plugs, but frm cylinder 3 the plug had oil at the bottom of it? What can this mean and also since changing plugs I have white smoke coming out of my exhaust? Any idea what it could be?

Title: Re: Engine oil found on spark plug
Post by: martin@gti.co.uk on March 20, 2014, 10:43:19 pm

Most likely PCV valve..common issue, or valve cover gasket...

Title: Re: Engine oil found on spark plug
Post by: vag12 on March 21, 2014, 10:39:54 am

PCV is blanked of so out of question, valve cover gasket was changed yesterday still the same

Title: Re: Engine oil found on spark plug
Post by: martin@gti.co.uk on March 21, 2014, 11:16:01 am

Ok..so white smoke indicates that the coolant is beign burned...might be tge head gasket.. try compression test..

Title: Re: Engine oil found on spark plug
Post by: omeydz on March 21, 2014, 11:16:33 am

Was it just oil or was the plug very sooty too? If so might check fuel injectors too.

Title: Re: Engine oil found on spark plug
Post by: sean140 on March 21, 2014, 11:27:18 am

Not sure if it's the same, But on my TSI engine, i had the exact same & i needed to have the gasket seal re done.

Apparently on a TSI it wasn't that straightforward to done and half the engine had to be took apart.  :signLOL:

Title: Re: Engine oil found on spark plug
Post by: OSB on March 21, 2014, 05:46:36 pm

White smoke tends to mean water getting into the cylinder - could be head gasket.
Blue smoke tends to be oil burning off.

If you have white smoke and oil on the plug, it points to a head gasket failure.
I hope not but best to get it checked.
Have you got oil in the coolant water? It might only appear as a trace on the surface.