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Matt
Matt, Engineer
Category: Australia Car
Satisfied Customers: 21372
Experience:  Automotive Engineer for 20 years, BEng hons degree,
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Car can be driven for 100 kls with no problems then of a

Customer Question

car can be driven for 100 kls with no problems then of a sudden blows large cloud of smoke
JA: How many miles are on the car? Have you been losing oil or coolant?
Customer: 48000 kls No coolant loss have not noticed excessive oil consumption
JA: What is the make/model/year of your car?
Customer: Suzuki Kizashi Sport 2010
JA: Are you fixing your Kizashi yourself? What have you tried so far?
Customer: Oil change was overdue so flushed motor with with cleaner Fitted new oil filter and new oil took it for long drive no smoke. Drove next day for 100 kls no smoke then while driving into street large cloud of smoke
JA: Anything else you want the mechanic to know before I connect you?
Customer: No thanks
Submitted: 14 days ago.
Category: Australia Car
Expert:  Matt replied 10 days ago.

Hello

The first thing I'd check is the crankcase pressure relief valve (PCV) these are sprung loaded and are only meant to 'burp' excess pressure every now and then. The exiting gas is piped back to the inlet, however should the valve stick open then the engine tends to suck the air out of the crankcase all the time and this carries oil over with it.

If you remove the air intake pipe and look inside where the crankcase breather is plumbed in you may find evidence of oil.

If you do find oil replace the valve

. If this is all OK then its possible that the valve stem seals are past their best and are drip-feeding oil into the intake. These can be replaced without removing the head by a competent garage in half a day or so

and if this is the turbo version then also check inside the intake just after the turbo for any signs of oil as this would be an indication that the turbo oil seal is starting to fail and a replacement / rebuilt turbo may well be required. Have a feel of the turbine wheel - there should be no play radially at all - but a little bit of axial / end to end float is normal

an engine flush may also help if you've got a sticking oil scraper ring so its worth a go, as for the oil if you go up a grade / use slightly thicker oil then this is less readily drawn into gaps and less likely to be burnt off

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