I have a 2wd saff and it can be Smokey when cold, it only happens sometimes, normally after its not been used for a while. When its warm its fine.

My standard turbo has a bit of shaft wear and has seen better days, could this be causing the blue smoke or am i looking at engine freshing time?

I have no problems with piston slap or anything and the top end sounds as sweet as.

Thanks

John

 

Sounds like turbo oil seals to me if as you say it clears when it's warm,if it was worn oil control rings or valve seal or guide's you would still see signs when warm.

Hope this help's m8.

Roy.

 

Hi.
hot or cold if the turbo seals are faulty you will see smoke ,let it idle when hot for around 5, mins and then give it a few heavy revs and check for smoke if so 90% certain turbo seals, if when u park the car and restart about 10mins later u get a little smoke probably vavle seal, oil draing back thruogh valve seals to cylinder, and then being burnt with fuel, if just from cold maybe the valve seals as (above )overnight oil drained past seals to cylinder then smoke on startup.

Dave,

 

Ignore all of the above advice and do a wet and dry compression test and if the rusults are inconclusive have a cylinder leakage test done, if your engine checks out ok you'll know it's the turbo. don't guess at things get it checked

 

HI,
compression test wont confirm valve seals, only rings, valves, headgasket,

Dave,

 

not true, do a WET and dry test, a wet test uses oil to seal the rings eliminating them from the equation leaving the only possible escape through the Guides/stem seals and headgasket, if compressions are considerably higher on all cylinder on a wet test it is possible that you have worn rings/bores etc BUT if the wet test reviels nearly the same results as a dry test then look elsewhere for problems

 

pj,

your opinion, wet test to see if compression improves, if after adding oil to bore,
if it does rings suspect, if it does not valves burnt out or sticking at seat, if valve
and seat are good and no bore problems u have good compression even with no valve seals fitted, they are to stop oil returning into valve guide and into combustion chamber, do you think valve seals will stop 200 plus psi of compression
we use a cylinder leak detection air pressurization kit which gives more indication and the kit diagnostics for compression doesnt mention valve seals,
Dave,

 

Thanks for all the advice guys, I think i will take it to a garage and get a basic compression test first. The head was rebuilt last year and hasn’t done many miles since this was done so hopefully the seals are ok.. Im thinking of getting a hybrid turbo in the next few months so i may wait and see if that resolves the problem.

If the stem seals have gone how much would i be looking at to get them replaced?

Thanks

John