smoking turbo question
04-19-2005, 04:05 PM
#12
1.5 BAR
Join Date: Oct 2004
Posts: 877
Re: smoking turbo question
Well, if we are still talking oil leaks here, any gasket under the compressor housing will not cause any oil leak since it only sees AIR.... 
The rubber seal under the backplate, as metionned before, unless you forget to install one, will rarely be the cause of an oil leakage.
the turbine-end piston ring, if it gets worn out, is the main cause for turbo leakage. It might in turns allow some exhaust gases in the crank case but I never verified that.
(Maybe because when the turbo is emptying itself everywhere, you don'T have time to worry much about some exhaust gases in the crank case!!
)
The rubber seal under the backplate, as metionned before, unless you forget to install one, will rarely be the cause of an oil leakage.the turbine-end piston ring, if it gets worn out, is the main cause for turbo leakage. It might in turns allow some exhaust gases in the crank case but I never verified that.
(Maybe because when the turbo is emptying itself everywhere, you don'T have time to worry much about some exhaust gases in the crank case!!
)
04-20-2005, 03:19 PM
#13
1.0 BAR
Join Date: Apr 2005
Posts: 375
Re: smoking turbo question
well I have the same problem.
So what Ive done is get my 2 stroke mikuni jet box out.
Drilled up a blank jet with a 1.5mm hole (What ole corky recomends)
And have forced it down my oil tube.
I dont think my oil presure is too high. But why take a risk.
DId do a test hooked up the oil line to a bottle and started the engine.
It drained the sump or arround 1 Ltr off oil in like under 10 seconds.
No way the turbo needs so much oil.
So toped oil and tommorw morning will take it for a spin to see if it the problem is resolved.
Hopefully its gone
So what Ive done is get my 2 stroke mikuni jet box out.
Drilled up a blank jet with a 1.5mm hole (What ole corky recomends)
And have forced it down my oil tube.
I dont think my oil presure is too high. But why take a risk.
DId do a test hooked up the oil line to a bottle and started the engine.
It drained the sump or arround 1 Ltr off oil in like under 10 seconds.
No way the turbo needs so much oil.
So toped oil and tommorw morning will take it for a spin to see if it the problem is resolved.
Hopefully its gone
04-21-2005, 11:18 AM
#18
1.5 BAR
Join Date: Oct 2004
Posts: 877
Re: smoking turbo question
If the turbo has to leak, it will generally leak through the turbine end first.
If oil leaks into the compressor housing and not through the turbine side or under the turbo, it's one of two problems:
#1 the thrust collar piston ring (or it's groove in the backplate) may be the damaged
#2 a too restrictive air filter (dirty?) may create enough restriction to turn your compressor in a oil pump because it's gonna try to suck oil through the bearing and thrust collar. It's easy to find out, just run the car with no filter for a little while. and see if some new oil appeared in your charge pipe.
If oil leaks into the compressor housing and not through the turbine side or under the turbo, it's one of two problems:
#1 the thrust collar piston ring (or it's groove in the backplate) may be the damaged
#2 a too restrictive air filter (dirty?) may create enough restriction to turn your compressor in a oil pump because it's gonna try to suck oil through the bearing and thrust collar. It's easy to find out, just run the car with no filter for a little while. and see if some new oil appeared in your charge pipe.
04-21-2005, 03:41 PM
#19
1.5 BAR
Join Date: Feb 2004
Posts: 954
Re: smoking turbo question
oil leaking through the exhaust side is usually not busted seals, it's caused by ''blow by.'' which is an exaggerated amount of oil pressure or under-piston crank pressure. yes, i think a restrictor valve can relieve this. however, if you're running a low compression engine like 8.1:1 a lot of blow by indicated by oil leaking or being forced through the turbine side, you're motor's fucked.
06-04-2005, 01:58 AM
#20
1.0 BAR
Join Date: Apr 2005
Posts: 375
Re: smoking turbo question
THe dam thing is still spewing white smoke.
Did the following
1. Checked the plugs clean.
2. DId a leak down and compresion test all engines showin 140-145 psi.
3. Checked oil filter.
4. Checked crank case vents.
5. Checked oil level dosent seem to be going down much.
6. Cleaned and checked air filter.
7. Oil flow verifed against Corky bells numbers restrictor in.
It only happens when the engine is run hard for some time.
The smoke color is white for sure.
Now only thing left is to chk if coolant level is droping.
So far no oil in coolant.
Did the following
1. Checked the plugs clean.
2. DId a leak down and compresion test all engines showin 140-145 psi.
3. Checked oil filter.
4. Checked crank case vents.
5. Checked oil level dosent seem to be going down much.
6. Cleaned and checked air filter.
7. Oil flow verifed against Corky bells numbers restrictor in.
It only happens when the engine is run hard for some time.
The smoke color is white for sure.
Now only thing left is to chk if coolant level is droping.
So far no oil in coolant.
