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Re: Blue smoke after downhill...Why?[200/82] posted by John Sargent on
Wednesday, 6 June 2001, at 7:35 a.m.
Blue smoke indicates oil. Going down hill using the engine as a car brake gives high levels of intake manifold vacuum. The. high vacuum condition can suck oil down the intake valve guides, if the vlave guide seals or valve guides are worn. Volvo uses valve guide seals only on the intake valves. They can be replaced with the head on the engine.
--John Sargent
MVP
Re: Blue smoke after downhill...Why?[200/82] posted by Nick Cronan on
Wednesday, 6 June 2001, at 12:40 p.m.
Yeah, it was blowing the blue smoke before the new turbo and even the intercooler at boost.
does that mean need to replace the intake valve guides?
--242 turbo intercooler
Re: Blue smoke after downhill...Why?[200/82] posted by JohnB on
Wednesday, 6 June 2001, at 12:43 p.m.
maybe, maybe no.
You can only tell if the valve guides need replacement with the head off...you have to wiggle the valve in the head and it will fall through into the cylinder if you try this. You can, however, generally replace valve stem seals using an air hold.