Steeelyglint
New Member
Hi some advice please. Viano with 98K on clock. No engine warning light on.
Apologies for long post - need help already feeling a bit sick with worry on this one.
Had grey smoke issue with car for a while ( couple of posts already) which became quite dramatic recently on way to work and I drove straight to my Mot garage for a diagnosis.( not MB specialist)
They rang me later to say it was a turbo issue. I've paid ( A lot) for a replacement and picked Viano up on Monday. The car is still smoking which the garage says is just burn off from the exhaust but which I think is more.
If I start car no smoke for first mile or so until engine is warm and has been driven, Smoke not always there, mainly grey and is most dramatic as I pull away and is worse in crawling stop start traffic I.e.my journey to work
Bur when sat stationary with car ticking over for 10 mins ( whilst I looked for OBD port) no smoke at all.
Drive car 10 mins and stop at lights and there can be an embarrassing amount of grey smoke smelling of oil. Seems to be getting worse and worried I am going to goose a brand new turbo. Car seems to be using oil too but hadn't until this issue started.
I suspect it's a PCV check valve issue.
I now have access to code reader but have insufficient skill to know what to look for ( but know how to use)
No error codes other than intermittent fault on glow plugs 3 &4 according to garage.
Searched forums but any related threads but they never seem to conclude.
Other info. A few years ago oil leak under bonnet was traced to dip stick coming free. It was fixed with a tighter o ring. I now think that might have been check valve failing and dip stick being forced out by crank case pressure.
Questions
Could it be PCV check valve? Alone or in combination with new issue?
is there a definitive way to check the crankcase vent system?
How can a check valve fail in a way that blows a turbo?
Should I take cam cover off to have a look for sludge. etc. & if so will I need new gasket?
Are there simple checks I can do with turbo hoses?
Should I ( get garage to) do a compression test?
On my engine is my check valve maintainable or is it part of engine cover?
Any other theories?
Want to avoid spending money on something that may ultimately be uneconomic to repair. As always any help really appreciated.
Apologies for long post - need help already feeling a bit sick with worry on this one.
Had grey smoke issue with car for a while ( couple of posts already) which became quite dramatic recently on way to work and I drove straight to my Mot garage for a diagnosis.( not MB specialist)
They rang me later to say it was a turbo issue. I've paid ( A lot) for a replacement and picked Viano up on Monday. The car is still smoking which the garage says is just burn off from the exhaust but which I think is more.
If I start car no smoke for first mile or so until engine is warm and has been driven, Smoke not always there, mainly grey and is most dramatic as I pull away and is worse in crawling stop start traffic I.e.my journey to work
Bur when sat stationary with car ticking over for 10 mins ( whilst I looked for OBD port) no smoke at all.
Drive car 10 mins and stop at lights and there can be an embarrassing amount of grey smoke smelling of oil. Seems to be getting worse and worried I am going to goose a brand new turbo. Car seems to be using oil too but hadn't until this issue started.
I suspect it's a PCV check valve issue.
I now have access to code reader but have insufficient skill to know what to look for ( but know how to use)
No error codes other than intermittent fault on glow plugs 3 &4 according to garage.
Searched forums but any related threads but they never seem to conclude.
Other info. A few years ago oil leak under bonnet was traced to dip stick coming free. It was fixed with a tighter o ring. I now think that might have been check valve failing and dip stick being forced out by crank case pressure.
Questions
Could it be PCV check valve? Alone or in combination with new issue?
is there a definitive way to check the crankcase vent system?
How can a check valve fail in a way that blows a turbo?
Should I take cam cover off to have a look for sludge. etc. & if so will I need new gasket?
Are there simple checks I can do with turbo hoses?
Should I ( get garage to) do a compression test?
On my engine is my check valve maintainable or is it part of engine cover?
Any other theories?
Want to avoid spending money on something that may ultimately be uneconomic to repair. As always any help really appreciated.