[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
On 31 Oct 2001, at 9:56, Sandin, Karl-Olov wrote: > Blue smokepuffs during deceleration by closing the throttle, I think > indicates worn valve guides. > The intake vacuum raises high while decelerating and the oil gets sucked in > through the valve guides. > Am I right here? > If so, Keith is right - thats no kritical problem (only unpleasant for the > cars behind you... ;-) ) > An engine with this symptoms might still have a long lifetime left. I think worn guides are worth worrying about. This means that the valves don't hit squarely on the seats, which produces a bending torque on the heads, and also means that they take slightly more time to seat, leaving less time to cool against the head. I'd be concerned that such a valve might fail in a way that was catastrophic to the engine. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/