Hi,

On my 1986 190E four-cylinder, I had a failed engine mount on the exhaust side that meant the engine vibrated a lot. This was replaced with (if I remember right) original parts, or at least good quality replicas (have heard bad stories about replica engine mounts..).

Then, the engine developed a rattle. It's heard best inside the car with the windows closed. It's the sort of rattle that sounds like a timing chain rattling, or as if someone left a screwdriver under the bonnet..

I replaced other engine mount, no improvement.

It's worst in 'D' at idle, still there driving at low speeds, not so bad in 'P', and gone in Reverse.

What's causing it?

Russell

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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg

Not an expert by any means (since I attempted to replace motor mounts on my W124 a couple of weeks ago...still can't get the bolt off the driver's side mount ), but it sounds like the new motor mounts cured the engine vibration, but exacerbated the transmission mount(s) if there are any. The clue to me is the different symptoms you are getting depending on gear selection...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car

I would also check your exhaust to trans mounting bushings if your car has these (my W124 does). After you replace the motor mounts, thereby damping the engine vibrations, all sorts of other noises become more apparent. The noise you describe could be these bushings, or, as G-Benz states, it could be the tranny mount.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

Not sure I understand - if it's worst in 'D' and idle, those are conditions you can duplicate (with caution!) with the hood up and you looking around for the source. If you need to slide underneath, set it up completely on jackstands so the drive wheels are off the ground.

Might be a shield on exhaust of cat converter, if you have one.

Steve

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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7

yes, check the exhaust for clearance. if you had work done on it it may have taken a "set" with the bad mounts that is now causing a clearance problem.

you may need to remove some clamps and twist the pipes to eleminate it.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

You are sure that the fan blades are not striking the fan shroud?

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2012 E350
2006 Callaway SC560