The mounts are next ... However I am becoming concerned that there is something more serious about it. The trans mount bolts look somewhat shinny.
I tried unloosening each injector pipe and each one makes it run weirder but don't know what is up. The vibration frequency is high enough that the motor does no look like it is bouncing around. The vibration telegraphs through the thing and the air cleaned 'buzzes'. The most concerning part is that there is a lower frequency throb to it. It is almost like a high frequency spike the is not real deep. I got under it an the tranny is not moving around, I hope it's the mounts ... George Larribeau -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of dave walton Sent: Monday, September 17, 2007 6:09 PM To: Mercedes Discussion List Subject: Re: [MBZ] Fw: Replacing Injectors(was Re:1985300SDNastyEngineVibration) Replacing the motor and transmission mounts on my 87 SDL helped the vibration at idle immensely. I was timid about jacking up the engine at the oil pan to get enough clearance to slide in the new engine mounts so I pulled out the Harbor Freight foldable shop crane. In the past, Marshall has recommended using the Mercedes Parts for mounts as the aftermarket ones don't last as long. I did not know better at the time and used the cheap ones. They are working fine for now. Next time I'll use the good ones. -Dave Walton On 9/17/07, George Larribeau <[EMAIL PROTECTED]> wrote: > Runs rough at idle extra noticeable when cold. Seems to be happier above > 1100 RPM or so This RPM is a bit higher when cold. It is better after I get > it on the 'Freeway' it gets up to operating temperature. The idle speed > could be a tad lower that I remember but it is, it would be a hair. When it > is at it worst it makes the hood noticeably vibrate and there is a low > frequency shaking. Some vibration induced buzzing noises inside the car. > When I open the hood it doesn't appear to be visibly vibrating all that > much. Does not take much throttle to get it to clear up (under load) > > > > I have not noticed a decrease in power however, subjectively it seems a bit > weaker when cold but this is hard to determine. Nothing major here. There is > a ramp I take off West I636 on to N I35E that it seems to act the same on as > far as power. It is a place where I need to get from 35 - 40 to 70 plus. > Does not seam any different here. It doesn't appear to smoke in ant unusual > way. From a drivers perspective the only noticeable smoke I ever get from it > is mainly noticeable at night where the headlights of cars behind reflect > it. It does not emit any thing nasty and if I don't wash it for a while > there is only a slight discoloration of soot on the bumper. > > > George Larribeau > Dallas Texas > > > ----- Original Message ----- > From: "John Robbins" <[EMAIL PROTECTED]> > To: "Mercedes Discussion List" <mercedes@okiebenz.com> > Sent: Monday, September 17, 2007 11:48 AM > Subject: Re: [MBZ] Fw: Replacing Injectors(was Re:1985300SD > NastyEngineVibration) > > > > George Larribeau wrote: > >> I replaced the injectors Saturday morning, to make a long story short it > >> may > >> have changed my perception of the behavior but it did not fix it. > > > > Could you refresh us on the details of the original problem? > > > > John > > > > > > _______________________________________ > > 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 > _______________________________________ 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
