m_nettleship

thick blue on over run?????

Alps Pacino

Turbo?????????????????

Valve stem oil seals????????????????????

Fucked if i know, sounds about right for a cossie tbh

costina

iTrader: (1)

Blocked breathers

daz1968

mine smoked when coming back on the peddle after over run, I took advice and did the valve guides and seals, no difference, I then did the turbo as thought it was that, ended up being bore wear so ended up with a full bottom end rebuild. So my advice would be take it for a leakdown test before you do anything will save a lot of hassle and wasted money.

xr_craig

iTrader: (2)

As above mate, take it for a leakdown test. Doesn't sound good.

Hope its not too bad

m_nettleship

i think its one of 2 things, turbo, as it running 24psi on stage 2 t3.

or like you say bootom end as I have had this b4, but its only done 2500 though on new engine, well bottom end on a 205 block.

it has all breather system on. seal and guides wouldent it do it in the morning though.

tabetha

Leakdown test will show nothing if it is NOT the compression rings gone>
Ie the oil rings can be knackered but the compression rings ok it will show ok, the compression rings however will NOT stop oil getting past them.
Make sure your breather is all clear, that you are running a aftermarket one as it will do this with std one.
The oil only has two ways to enter combustion chamber, either seals or rings, the seals being the ones on the turbo or the ones on the valve stems.
Look in your inlet pipe between turbo and the throttle housing to see if there is any oil here, if there is you have a leaky turbo if there is not you are most likley looking at valves stem seals.
If you have suffecient wear to kill the stem seals the guides are probably shot as well as the exhaust valves, which they suffer from terribly.
tabetha

captiva

I had the same problem and narrowed it down to oil rings being gummed up so took a chance on an additive (which I don't normally believe in) called Auto RX out of Florida and it worked wonders, cured the problem in 550 kms. They are on the web. Thought I could risk $25 and it paid off

















9

JanDK

iTrader: (3)

Oil rings on the piston, correct?????


I also have this problem, just cant se the smoke when overrun.. she about consumes about ½l pr. 500km if I give her some heavy pedal often. Head is very healthy with new stems and guides.. and turbo, hmm.. no oil inside inlet or exhaust. Maybe I should try this Auto RX

costina

iTrader: (1)

Over run = vacuum in the intake = any oil in intake gets sucked in comp chambers= blue smoke

As above check inlet tract for oil,if 2wd remove elbow by t/body as this is were it collects the most oil

If you have oil here then its 2 things turbo seals or u still have a vac tube connected to breather sys

Mine was the turbo

BUT when changing a turbo clean ALL parts cooler plenum pipes etc

captiva

Yes I mean oil control rings on the pistons. I checked compression pressures and they were fine, those are the top rings on the pistons, but oil rings were gummed up and Auto RX cured it. When you add it to the oil it is not normally a quick fix you have to run 2000 kms but in my case it was cured in 550 kms. You have to change the filter several times as it cleans the inside of the engine completely

m_nettleship

hmmmm is it like a forte flush then, but the engine has only done 2000.

I am positive excaust guides were done, wouldent it smoke on fire up in a morning??

Going to take the elbow of tomoz sometime, so thanks 4 that.

THANKS 4 ALL THE HELP GUYS AND MORE IDEAS LET ME NO. I WILL KEEP A CHECK ON HOW MUTCH ITS USING.

Pic of engine with what breather its using

JanDK

iTrader: (3)

yeaahh.. thanks...

m_nettleship

JUST TO CLEAR THIS POST UP IT WAS 1 TIME OF SMOKING AND I HAD PUT TO MUTCH OIL IN 4.1 LITRES ND IT NEVER DID IT AGAIN.