rover 1.8 turbo still smoking bad

[Leehaughey]

hi all,

i own a rover 75 1.8 turbo that i have had work done to,

it started smoking firstly on start up after it had been standing,
i was advised it was the valve seal being worn.

but then it started smoking really bad while driving,
i was then advised it was the turbo that had gone,

i removed the cylinder head and had it fully refurbed and Cylinder head services in Bilston at the cost of £110
i removed the turbo and set it to Midland Turbos where they confirmed it was shot and i purchased a refurbed unit at the cost of £330

while being rebuilt it has had a new MLS head gasket, new oil and oil filter, air filter, spark plugs, water pump, timimg belt basically everything has be changed for new.
I even primed the turbo as instructed and oil and water was flowing around the unit fine. I removed the ignition fuse so the car did not fire up until the oil was flowing well.

But yet after all this the car is back together and the smoking issue is still as bad as ever so i'm at a complete loss at what the issue is now !!!

[jimbob82]

£110 for a FULL refurb on a K16 head does not sound right. most liekly it was a pressure test and skim, unless the shop are VERY cheap.

My opinion is piston rings are shot.

[davepoth]

jimbob82 said:

£110 for a FULL refurb on a K16 head does not sound right. most liekly it was a pressure test and skim, unless the shop are VERY cheap.

My opinion is piston rings are shot.

Could well be; A compression test would give you an idea without stripping the whole thing down. Just out of interest, was the crankcase ventilation cleaned before all of this work was done?

[DVandrews]

A commonplace problem on the K series is fractured ring lands leading to falling compression and eventually heavy oil consumption. The ring pack is very narrow, the lands are only around 1.5 mm thick and the pistons are just regular cast, with the long stroke and relatively short piston side loading on the thrust side is quite high.

Dave

[one eyed mick]

It may be wide of the mark but ,how long did you run it whilst smoking /using oil , it can take along time to clear the exhaust system of unburnt oil , just a thought

[Mr2Mike]

Under what conditions does it smoke? e.g. first thing after starting it, under hard acceleration, on the overrun? Is it blue smoke?