Lupo still smoking

[1.4Josh]

A mate of mine is carrying out work on my Lupo sport as it was smoking and burning excessive oil.

A compression test was carried out and the results were as they should be which ruled out the possibility of piston rings.

After receiving advice off here and of a vw enthusiast we were pretty certain it was the valve guides and stem seals.

They were replaced also along with the head being skimmed, head gasket + Cambelt kit.

After finally getting it built up again it turns out it is still smoking.. At first just fault it was excess oil sat in the cat so left it running a good half hour and it was no different.

Any ideas/advice ?? Thanks

[durb]

Read you previous thread, was the engine smoking all the time or just on overun?

Smoking all the time would point more to rings/bores rather than top end.

Have you taken it for a run to get the exhaust hot to burn the oil out of it - sitting at idle may not be getting it hot enough?

When you say that a compression test showed "what it should be" could you elaborate - was it done with the throttle wide open? were all the pressures even and up to spec? was the test repeated "wet" to verify the bores? Old school way of checking the bores is to add a little oil to the bore via the plug hole and repeat the test - if it leaps up then its a pointer towards bottom end wear.

Did the bores "look" ok with the head off?

Were all the pistons a uniform colour before decoking?

Were the pistons decoked to the edge? if so this may take a few miles to "carbon in" and you may see an improvement with time.

From the above I'm guessing that you didnt do the head rebuild, but do you know if the valves were replaced as well as the guides? were they checked for play before it was all put back together?

Sorry to hit you with all these questions, but A bit more info may help people point you in the right direction.

Lloyd