Marshall, I defer to your wisdom on this matter. Do you have another potential cause for the blue smoke after pulling away from a stop, engine warm and the amount of smoke varies with the length of time idling? Dave M. had this issue and replaced the valve stem seals and the problem was cured. I'd love to hear other potential causes before I tear down the top of the motor to replace the seals.
...Kevin 87 300TD 275k miles Marshall Booth said: > [EMAIL PROTECTED] wrote: >> Don M., >> >> I question whether this method will work in a diesel: "To check your >> valve guides and/or seals find a >> very long hill and drive/coast down under compression, creating a large >> vacuum draw, at the bottom of the hill apply fuel watch your rear view >> mirror and if you get a noticeable puff of blue smoke it is seals/guide >> issue." >> >> Is this procedure recommended for gas engines or specifically for >> diesel? Someone correct me if I'm wrong - does the mechanical fuel >> injection pump on an OM 617 motor stop all delivery of fuel when >> 'compression braking'? If it doesn't, and some fuel is still being >> burned, then I expect that the oil leaking through bad valve stem seals >> would also be burned and there would be no puff of oil smoke when >> throttle is applied. >> > > It is rare for well maintained Mercedes diesels to require valve stem > (or even seals) replacement during their lifetime (and that is often > 400-500kmi). > > Marshall > -- > Marshall Booth Ph.D. > Ass't Prof. (ret.) > Univ of Pittsburgh School of Medicine > Department of Pharmacology 1300 BST > Pittsburgh PA 15261 USA > [EMAIL PROTECTED] > > > _______________________________________ > For used parts email [EMAIL PROTECTED] > For new parts see www.buymbparts.com > For repairs see www.oldworldauto.com > > To Unsubscribe or change delivery options go to: > http://striplin.net/mailman/listinfo/mercedes_striplin.net > -- "Thank God for Microsoft" -- Linus Torvalds
