"Diesel Purge delivered full strength " What is the best technique for this?
Fill secondary filter and start ?? George Larribeau Dallas Texas ----- Original Message ----- From: "Marshall Booth" <[EMAIL PROTECTED]> To: "Mercedes Discussion List" <mercedes@okiebenz.com> Sent: Tuesday, September 11, 2007 2:33 PM Subject: Re: [MBZ] 1985 300SD Nasty Engine Vibration > George Larribeau wrote: >> My 300SD vibrates cold real bad, the vibration diminished when warmed up. >> It >> gets real noticeable below 1200 Rpm or so. At first I thought is was an >> abrupt new behavior but I now believe it has been doing it for a while. >> At >> first it was not real noticeable and some time last week it got a whole >> lot >> worse. It also seems to turn off harshly. It started about the time I >> changed the filters, the primer pump and gave the engine a 'good washing' >> to >> get the crud off to work on it. Last Saturday I adjusted the valves it >> was >> about due ... >> It starts OK and does not smoke (well not any unusual smoke). A while >> back >> when it needed glow plugs it started hard, idled real 'ruff' and would >> smoke. >> It runs good at 3K or so on the interstate. >> So does it have the same kind of motor mounts like in the "OM603 Engine >> Vibration" thread or do I need to look else where? > > Anything that results in unbalanced power from different cylinders will > cause what you describe. I'd start with a dose of a superior injector > cleaner (Diesel Purge delivered full strength or Chevron Techron > concentrate - the same stuff for gasoline cars) will often cure the > problem if it results from clogged or coked nozzles, but will have > little effect if the cause is worn nozzles. If a dose of cleaner doesn't > work then the injectors will need to be pulled, tested and recalibrated > or rebuilt as required. This is beyond what most DIYers can do as an > injector tester and the skill and knowledge to operate it is required. > > If the motor mounts have deteriorated (and they surely have if they are > more that 10 years old) that will exacerbate even the slightest imbalance. > > Marshall > -- > Marshall Booth Ph.D. > Ass't Prof. (ret.) > Univ of Pittsburgh School of Medicine > [EMAIL PROTECTED] > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
