Engine Mounts - right part

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petrol_pyro
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Engine Mounts - right part

Post by petrol_pyro » Sun 12 Aug, 2018 5:49 pm

Hi All

I just started the job of replacing the engine mounts in my 1988 300E, and found something odd. The old mounts (part number 201 240 4317) are much shorter than the new ones I purchased (ebay seller prestiege-auto https://www.ebay.com.au/itm/Mercedes-Be ... 3087932525)

Photo is below (new on left, old on right).

Is it just that the old mounts had completely collapsed, or did I get the wrong part? Advice is appriciated

Image

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T-Modell
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Re: Engine Mounts - right part

Post by T-Modell » Sun 12 Aug, 2018 5:53 pm

Hi,
if they fit I'd put them in; I remember having rubber parts half the height after 25 years. Strange, that it's a 201-number ... maybe they're the same for W201 and W124 ...
Thomas
---------------------------------------------------------------
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John Green
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Re: Engine Mounts - right part

Post by John Green » Mon 13 Aug, 2018 1:05 pm

T-Modell wrote:
Sun 12 Aug, 2018 5:53 pm
Hi,
if they fit I'd put them in; I remember having rubber parts half the height after 25 years. Strange, that it's a 201-number ... maybe they're the same for W201 and W124 ...
Thomas
Totally normal, the old ones have collapsed. These were originally a 201 number as they were used in the W201 190E 2.6. The number has changed a bit obver the years witht he current design spec being A124 240 19 17.

A very "German" fact is that these are differant between a car with and without air conditioning. No doubt some German engineer spent days working out why this was so :think: :think: :think:
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Ivanerrol
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Re: Engine Mounts - right part

Post by Ivanerrol » Mon 13 Aug, 2018 4:22 pm

Proper engine mounts are hydraulic - i.e. are filled with oil.
If the oil leaks out - usually due to old age - seal degradation, the mounts collapse.

Beware of buying el cheapo PRC mounts - they are solid rubber with no hydraulic oil gel. You wont get a proper result with these.
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T-Modell
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Re: Engine Mounts - right part

Post by T-Modell » Mon 13 Aug, 2018 4:25 pm

John Green wrote:
Mon 13 Aug, 2018 1:05 pm
...A very "German" fact is that these are differant between a car with and without air conditioning. No doubt some German engineer spent days working out why this was so :think: :think: :think:
I know the guy. He only needed 3 seconds to find out, that the compressor adds extra weight :laughing6: :laughing6:
Thomas
---------------------------------------------------------------
1967 W111 250SE Cabriolet, horizon blue
1973 W115 220D 5.0 Pick-Up Argentina, work in progress 2017/18/19
1986 R107 500SL, arctic white, the midlife crisis viagra replacement
2007 R171 SLK350, calcit white
2008 S211 E63T, calcit white, sleeper

petrol_pyro
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Re: Engine Mounts - right part

Post by petrol_pyro » Mon 13 Aug, 2018 8:53 pm

Thanks guys for the advice... very useful and confirmed the difference between a 'non-ac' and 'ac' mount for me.

Now the question.. do you think it makes a rats of difference if I put the non-AC ones (which i have) in the AC car?

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T-Modell
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Re: Engine Mounts - right part

Post by T-Modell » Mon 13 Aug, 2018 8:58 pm

petrol_pyro wrote:
Mon 13 Aug, 2018 8:53 pm
Now the question.. do you think it makes a rats of difference if I put the non-AC ones (which i have) in the AC car?
Well, the car has a lower centre of gravity then, so cornering in the suburbs of Melbourne might be possible with 1-2km/h more ... :whistle:
Thomas
---------------------------------------------------------------
1967 W111 250SE Cabriolet, horizon blue
1973 W115 220D 5.0 Pick-Up Argentina, work in progress 2017/18/19
1986 R107 500SL, arctic white, the midlife crisis viagra replacement
2007 R171 SLK350, calcit white
2008 S211 E63T, calcit white, sleeper

petrol_pyro
Dernburg Wagon
Posts: 9
Joined: Tue 30 Dec, 2008 12:51 am
Model you own: w126
Region: Victoria
Location: Melbourne

Re: Engine Mounts - right part

Post by petrol_pyro » Mon 13 Aug, 2018 9:10 pm

T-Modell wrote:
Mon 13 Aug, 2018 8:58 pm
petrol_pyro wrote:
Mon 13 Aug, 2018 8:53 pm
Now the question.. do you think it makes a rats of difference if I put the non-AC ones (which i have) in the AC car?
Well, the car has a lower centre of gravity then, so cornering in the suburbs of Melbourne might be possible with 1-2km/h more ... :whistle:
Thomas
I will take that as a no...

Interesting, Febi Bilstin make two mounts: https://partsfinder.bilsteingroup.com/e ... nsion?f=31

Interestingly the one that the OE parts codes state is NOT for use for aircon, the Bilstein part specifically states it is limited for cars with aircon (FEBI 03428). So if it will fit, it is staying. And I'll corner faster with my lower centre of gravity.

Any suggestions on whether loctite is needed on the engine mount bolts? Or just torque up to 55nm and leave it?

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