- White smoke coming out the back of a diesel???
As turni[ says – white smoke is actually steam – head gasget – check the oil the filla cap, if it’s emulsified (gone white and gooey) then more than probably the head gasket – about 300=400 notes at a garage – about 50 notes if you do it yourself – pretty easy job if your handy.Posted 8 years ago
Bought from a dealer or privately?
Started up can just mean condensation in a stainless steel exhaust. Whilst driving- damp cold day?
Get a compression test done (any high st garage can do) on your coolant system.
Did he buy the car from a dealer? How long ago did he buy the car?Posted 8 years agoourkidsamMember
I’ve just had this on a petrol Polo, so might not be the same thing at all, but – it’s some seals have gone and are letting oil in to the exhaust. Garage said it’ll be £400 (seals cost FA, but the engine needs taking apart to get to them), or I could try putting some “no smoke” stuff in with the oil. It thickens it up and stops it going past the seals. Did it yesterday, didn’t seem to make much difference the first trip but since then I haven’t seen any more smoke. Winner.Posted 8 years agoPeterPoddyMember
Oil doesnt burn white does it?
I can do yes. I once overfilled with oil on an old Polo. It looked like the smoke trail of one of the Red Arrows! It’s oil forcing itself up past the piston rings in my case.
Burning oil (As from a worn engine) is not normally as bad, but more costly to fix. TBH now I’ve read it again it looks more like burning oil, which can have a bluey tinge, and you can SMELL it if you follow behind, too. (Black smoke is excess fuel)Posted 8 years agowillardMember
Look at the exhaust… If it looks suspiciously clean (i.e. clean metal) it could be the head gasket sucking in water, but normally that would result in the car being harder to start and a big chuggy when cold/low revs.
It could be throwing more fuel in than need be and just throwing the unburnt stuff out the back. If it is running rich, then check the air filter to see if it’s not full of shit.
However, I _would_ check to see if there’s foam in the oil or a lot of gunk in the water. If there is, best bend over and prepare for a mechanic administered shafting. Unless your mate fancies doing the strip/skim/reassemble himself.Posted 8 years agoparkesieMember
as above white is steam can be condensation in the axhaust system Short journeys wet cold weather dont help that one. Then your in to the realm of head gaskets cracked blocks and heads. Wont always get the old mayo in the oil syptom.Posted 8 years ago
If its a blue tinge its oil being burnt think head gasket piston rings or turbo oil seals. Black smoke is over fueling blocked air filter dead turbo.thisisnotaspoonMember
how many miles? unless its overfilled its unlikely to be oil coming past the pistons unless your 100,000’s of miles in. Unless its a borked piston ring? Is it down on power?
Oil seals, as snaps said the turbo one is the most likely and usualy first to go.
been running it on veg oil? bacteria that thrive on the stuff turn the loverly disel into a white sticky emulsion.
start with the cheepest/easiest , check oil to eliminate HG, then water trap, etc etcPosted 8 years agochopperTMember
Yes yes, steam is white, oil smoke is blue, and overfuelling is black, but proper white smoke on a diesel is raw diesel vapour: ie: unburned fuel (smoking off in the exhaust). No/low compression on one or more cylinders? Bad injector dribbling not squirting? Somethings up.Posted 8 years ago
On a general note, ring round the local council- ask to be put through to their taxi licences office (Ive done this- with 3), be very politely, deferring etc and ask them if you could check a reg if its been previously registered as a taxi. Just thinking about clocking and cambelt-change issues as well.Posted 8 years agocoffeekingMember
Steam is easily distinguishable from oil smoke (either blue or white oil smoke, oil burned looks blue, oil evapourated looks white – generally a failed exhaust-side oil seal on a turbo will look like a whitey-blue like mine when the exhaust fabricator decided to rag it down their road and will increase a) under boost and b) when idling for 5 minutes or so).
Check for mayo.Posted 8 years ago
Check for oil levels.
Check for blocked breather hoses.
Then start to worry about turbo problems.
The topic ‘White smoke coming out the back of a diesel???’ is closed to new replies.