Low compression due to a bent rod is also a concern with these engines with a rough idle.
Sent from my iPhone > On Feb 23, 2016, at 3:15 PM, Meade Dillon via Mercedes > <[email protected]> wrot > > Dan, > > Motor mounts may be required to isolate the vibration, but if the engine > has issues (usually minor) then new mounts are just a band-aid. > > Rough idle can be due to issues at the injectors and delivery valves. > There is a guy Mark something on Peach Parts, located in Columbia SC, that > will clean / test / set / balance your injectors for about $120, I can post > his contact info if interested. His Nom de Plume is Greazzer. I had him > service the set in my '87 wagon, he did great work. My engine at idle is > rock steady, no visible movement, no vibration in the cockpit. This summer > I'm probably going to send him the injectors from my '95 sedan to be > completely rebuilt with new nozzles. > > If you go into the delivery valves, which I consider a minor job well worth > doing on any new MB diesel, a special splined socket is required. I always > replace the copper washer, spring, and o-ring on each valve. However, > clean clean clean is the order of the day, as the least contamination of > the DV or the hard injector line can result in clogged or damaged DV or > injector, and there is a special torque sequence for the DVs. This job is > possible with the intake manifold in place, but best done with that removed > (new gaskets required). At that point, one had might as well replace all > the hard injector line plastic clips and rubber pads under them, and also > refresh the glow plugs, and then none of those things will need to be > touched for another 100k miles or so. > > Collapsed hydraulic compensators (aka lifters) can also cause idle > problems, but you'd probably get some lifter clack-clack if that were the > case. > > ------------- > Max > Charleston SC > > On Tue, Feb 23, 2016 at 2:56 PM, Dan Penoff via Mercedes < > [email protected]> wrote: > >> >> I do get some vibration in the cabin at idle, but a new set of motor >> mounts is in and waiting for me at the dealer. I'll put them on this >> weekend and see if that helps. Otherwise, apart from the smell and minor >> noise at cold startup, it's tough to tell this is a diesel. > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
