valve stem oil seals ?

[jonny6 0]

car has recently started to puff a little bit of blue smoke out under hard load , am i right in thinking my valve stem oil seals are on their way out ? my engine has done 136 k and it pulls very very well indeed .

Are worn valve stem oil seals going to affect performance ?

Can somone point me in the right direction of somone repetable and reasonably priced that can fix it ?

Thanks.

[j933 vrd 0]

i was told stem seals make it smoke cuming back down the revs. mine does it coasting down hills. doesnt effect power tho i dont think.

[jonny6 0]

what would bluey white smoke under load be then ?

[j933 vrd 0]

could be piston rings, but i am not a mechanic. search it on here.

[tonk 0]

stem seals burn oil on overrun like vrd said...it does sound like piston rings to me im afraid.

[Devildub_06 0]

Have a leakdown test done, this will eliminate the rings, then it would be a case of valve stem seals. It will affect combustion, so performance may suffer as a result.

[jonny6 0]

where would i ger a leakdown test done ?

[Devildub_06 0]

Any good garage should be able to perform one

[Phat VR6 3]

surly a good old compression test will check the state of the rings. If not why do compression tests even exsist?

[Devildub_06 0]

Could do that, although if you have any oil remaining in the bore when you perform it, the result maybe slightly higher than you would expect. If it's burning oil then you can assume that werever it's coming in from, it cannot escape from quick enough, so may give you a false result.

Compression checks exist to trace sealing issues such as ill seating valves, worn bores, and severe leaks across the head gasket, but then you'd do a leakdown test to find out where the leak was coming from anyway!