Smokey engine

[Ryanmck1984]

I just noticed today whilst playing about with the throttle in the driveway that when the engine is revved initially, smoke appears from the exhaust.

It only happens for a second or so and disappears. The engine oil is spot on, no play in the bottom pulley and the bus drives like a dream.

Any ideas? Cheers.

 

[privatejobs]

poss valve guides

 

[Trikky2]

What colour is the smoke?

 

[Ryanmck1984]

It's blue

 

[Trikky2]

Blue is oil being burnt so yes it could be valve guides.

Other thing to check is what the oil is like. If its 30 grade try changing to 20/50.

Also smell the oil to check for petrol contamination which will make the oil too thin.

If it only does it shortly after starting but stops when warmed up then I wouldn't worry too much for now but keep an eye on it and if it starts using oil and needing regular top ups then its time to take action.

 

[Ryanmck1984]

Thanks for the advice Trikky.

I use 20/50 and changed the oil 250 miles ago so I know that's good. I'll keep an eye on it.
Thanks again.