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How do I check if it's the pistons or valves at fault without taking the head off
Cheers Marcus
The car doesn't smoke that much when cold but when it's warm and deceleration then eccelarate a load comes out

Deceleration causes a vacum that sucks oil down the valve guides


If the car does not smoke on acceleration chances are the valve oil seals / guides are worn

Do you get a puff of smoke when you first start it in the morning
People used to say if it were the seals oil would seep past over night and a little would be burnt off when you first start it

this is of course just my opinion and could of course be wrong