Does anybody have experience with Karlyn motor mounts? Previous owner replaced all my mounts when the car had 258000 miles on it back in 2011. I bought it at 316000 and it's now at 332000. It always had a vibration from the first moment I test drove it but the mounts look to be ok to me. That is they don't appear to have deteriorated much. Just wondering if they are due for replacement after five years and 740000 miles? Any way to check?

- Peter.

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2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S

For myself I do not replace till the Motor Mounts are no good.

As long as you are not experienced bothersome engine shaking, collasped mounts or belts getting too close to hoses I don't see the point in replacing them.

If you are speking of a W123 you can still get Lemförder/Lemfoerder/Lemforder Motor Mounts (the mercedes star is ground off of them) wich are actually made by phoenix and are the same as the mounts you would get from Mercedes. They are oddly made in Turkey and the Phoeix logo is still on them.

Lemförder/Lemfoerder/Lemforder does not make the different right and left mounts but many have used the Turbo Diesel mounts on both sides with no issues.

This is from my notes but there is other threads and posts on the subject.
http://www.phoenix-ag.com/index_en.html
Stock 84 300D Motor Mounts the same as Lemforder; pics show proof

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84 300D, 82 Volvo 244Gl Diesel

My Stock Motor Mounts the same as Lemfoerder
Stock 84 300D Motor Mounts the same as Lemforder; pics show proof

Using 300D Motor Mounts on a 240D (w123 chassis)
Comment from Post #1 between the pictures:
“So after verifying that 300D mounts can be used on 240D cars, I ordered Lemforder mounts from Phil for $26 instead of $134 for OE. I just got them today. Found that they were made in Turkey.”
Lemforder Engine Mounts

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84 300D, 82 Volvo 244Gl Diesel

Thank's for the info. Looking at the mounts and at the clearance between the hoses etc they seem to be ok but there is an issue with shaking on startup, shutdown and a vibration during driving. But the front anti-vibration mount is also missing and I have a replacement for it which hopefully might make a difference. Also need to do a valve adjustment etc. Got some work to do on it coming up.

- Peter.

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2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S

I thought the shocks were designed to stop shaking at shut down? Do you have engine shocks?

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Just replaced the engine shocks on my 603 motor. Made a surprisingly big difference in calming the motor at idle. No motor shake. Also took the kick out of startup and shut down. Mounts are Lemforder which are much better than the other offerings, hands down. Seems to be the compound they use. Maybe a shore hardness of about 60A.

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1986 300SDL 440,xxx

I have noticed a definite difference in vibrations from different motor mounts. With poly-filled cheap mounts w/ steel backer plate underneath, the vibrations were noticeably bad. With 1 "Made in Germany" mount and 1 "S11" as in the post #3 link, it idles noticeably smoother. But, I still get a slight resonance at certain rpm's, mostly when driving slowly in parking lots. The engine doesn't visibly move, but you feel the vibrations in the cabin. I do have a poly-filled tranny mount so that might be a remaining culprit.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

So while this thread is up, I thought I might as well, post my issue.

When I shut off my engine, the car shakes and rumbles a lot. You can hear the hard resonance in the cabin going throughout the chassis.


It's quite bad, I thought this was normal because it is a diesel.

How much shake at shutdown is too much and how can I tell if engine shocks are bad?

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.

Mine were the originals and the passenger side shock had absolutely no resistance.

They are easy to pull and check bit chances are they need replacement.

May not totally solve your issue but will help

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1983 300CD Turbodiesel

You might want to T in a Vacuum Gauge at the Vacuum Shutoff on the Fuel Injection Pump and have someone turn the Engine off and see if you suddenly get the full vacuum to it.
I say that because there is another Vacuum Valve on the Steering Colum Lock that controls the Vacuum to the Shutoff. If that is not functioning correctly then you shutoff likely will not go as planned.

Another way would be to hook up a Mightyvac to the Shutoff on the Fuel Injection Pump and start pumping and see what happens during the shut off. Then pump and see if the Shutoff actually holds vacuum.

If the Shutoff leaks off enough vacuum it is not going to shutoff as fast or as comempletely.

I know mine must be somewhat porus as it does not hold vacuum but I figure as long as it shuts down I am OK. Note that when I changed the Steering Colum Lock it came with a new Shutoff Valve on it.

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84 300D, 82 Volvo 244Gl Diesel

Yes, the other stuff that can cause your Engine to shake is good to eliminate.
Also the Transmission Mount has some effect. Mine does not have the 4th mount so the Engine and Transmission are suspended on the Motor and Transmission mounts

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84 300D, 82 Volvo 244Gl Diesel

Mr. Giants....There will be virtually no engine shake at shut down if you simply replace the engine shocks, and your motor mounts are somewhat fresh. See my previous post above.

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1986 300SDL 440,xxx

I do not have engine shocks. There is a fourth T shaped "anti-vibration" mount that goes on the front of the engine. Hopefully this will help some. I suppose before I get around to doing this I should get a new transmission mount as well as they were all done at the same time.

- Peter.

__________________
2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S