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Old 07-24-2003, 04:12 PM
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Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,058
Best Mounts

Greetings. Just picked up my first MB. 1995 e300d 115k. Some minor things but overall very impressive. Have been lurking on here for a few weeks to get a feel and am amazed at the civility and the depth of knowledge shown here. Kudos to the moderator and the skilled techs here.

During the test drive, usual shaking at idle. Disappears at speed. Dealer installed new motor mounts but probably did not use the best quality. Still shakes as much as it did before. I have a feeling this can be solved using a top quality product. Can anyone suggest a premium brand of mounts? Is oem best quality or is there an aftermarket brand? Engine is clean, runs smooth, no smoke, starts easily. I read lots of posts here and think starting (again) with the mounts is wise. Any thoughts?
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Old 07-24-2003, 04:40 PM
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
If the problem is the motor mounts, then I would doubt they were replaced. Do a search - there is a technique for testing them.

'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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Old 07-24-2003, 07:33 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Run a couple bottles of RedLine injector cleaner through it -- you may simply have varhished injectors that don't spray well at idle.

The gel filled mounts are a combination rubber mount and shock absorber -- this is why things are so smooth when they work well.

The easy way to check is to simply look. There is a tapered portion on the bottom -- if you cannot see it easily, or the rubber "ring" in the center, just below the steel hemisphere on top, is close to or sitting on the frame, the mount is shot. Ditto for any evidence of oily stuff (the polyethylene glycol) leaking out.

Check for vac leaks (bad vac lines are a possibility, also leaking idle control hoses), bad plug wires (do you have the funky dual plug wires? If so, they may be bad and the second plug doesn't fire right), etc.

Also check the tranny mount -- if it is too soft or separated, it can cause vibration problems too.

1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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