Worn turbo?

[mr pad]

Hi,

I have a car, but its not a toyota, trouble is, the manufacturer of this car has only made three turbo model cars I know of so im reluctant to ask a bunch of n/a peeps.

Ok its a honda city turbo Car seems to be mint for its age, motor seems ok, but it has recently started blowing blue smoke at idle. Seems to be fine under boost and is still going hard. Im thinking its probably the oil seals in the turbo, is there an easy way to check? Next on the list is a comp check to make sure the rings arn't stuffed, is there a way to check for valve wear too?

Chur.

[sergei]

Open oil cap while running - if no blow by then rings are ok.
It might smoke because of worn valve stem seals.

[Lith]

I have a car, but its not a toyota, trouble is, the manufacturer of this car has only made three turbo model cars I know of so im reluctant to ask a bunch of n/a peeps.

Heaps of turbo owners on the Honda forums who would be able to give decent suggestions on this.... a lot of them have gone from turbo'd cars to Hondas and vice-versa, if not both at the same time

Strange that its doing it at low load, but not under heavy acceleration. I'd start wondering what the odds are that its valve stem seals or something of that nature - in vacuum the pistons can drag oil past them from the head into the cylinders and then burn it. How smokey is it exactly?

[Ae92typeX]

I'd lean towards the stem seals also rather than turbo.

[FrEsH]

my old turbo on the starlet did the exact same thing, was rear oil seals..replaced it iwth a high flow and no smoke at all now

[TrouserFxGt]

What colour is the smoke? White and its your turbo seals and blue its your stem seals. Stem seals usually also weap upon opening the throttle. White smoke hasn't been throught the combustion chamber.