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Matt
Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 21710
Experience:  BEng hons Mech engineering, in auto industry 22 years
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2001 1.6lt golf, runs rich when's hot and blue smokes, no fault

Customer Question

2001 1.6lt golf, runs rich when's hot and blue smokes, no fault codes?
Submitted: 2 years ago.
Category: Car
Expert:  Matt replied 2 years ago.
Hello

blue smoke is usually oil burning

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 carrys 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

Expert:  Matt replied 2 years ago.
Hi

do you still need help?

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