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Old 06-04-2012, 05:53 PM   #1
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Another Motor Mount Question

There has been many discussions concerning the new and revised 987 motor mount superseding the older 986 design. here is a pic for comparison:



Well, I decided to spent $20 each for the newer style motor mount stops. I am glad I did; it appears that Porsche redesigned, and hopefully improved, the stops in a substantial way as well.



Now, the question is, which side is which? Does the rubber side go on the outside and the foam on the inside, or vice versa?

TIA

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Old 06-04-2012, 05:59 PM   #2
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What is a Motor Mount Stop? How does it work?
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Old 06-04-2012, 06:12 PM   #3
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73

What is a Motor Mount Stop? How does it work?
For further clarification:

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Old 06-04-2012, 06:22 PM   #4
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I mounted my cushions so that the rubber side faced the mount. I assume that you want the rubber facing the part that is likely to come into contact with it.

Your first picture shows the mount but no aluminum housing. Did you push it out?
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Old 06-04-2012, 06:57 PM   #5
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Its the first I have heard of these mounts. Interesting. Obviously I have NOT been under my car but the parts are in the garage and ready to go (when I am of course).
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Old 06-04-2012, 07:42 PM   #6
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Quote:
Originally Posted by blue2000s View Post
I mounted my cushions so that the rubber side faced the mount. I assume that you want the rubber facing the part that is likely to come into contact with it.

Your first picture shows the mount but no aluminum housing. Did you push it out?
Well, the stop gets sandwiched between the mount and the carrier, where otherwise there would be metal to metal contact when the rubber bushing flexes too far. So, I am still not clear on how the hybrid stop is supposed to make a difference.

As for the bushing in the pic, I only bought the bushing from Pelican and pressed it in. It worked out OK only because I have a 10 ton, shop grade, hydrolic press at home. Otherwise, it would've been impossible. Without a press, or even with a cheapo version from Harbor Freight, one shouldn't attempt it. It's a pretty hard push.

Last edited by seventythree; 06-04-2012 at 07:45 PM.
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Old 06-04-2012, 07:46 PM   #7
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Originally Posted by seventythree View Post
Well, the stop gets sandwiched between the mount and the carrier, where otherwise there would be metal to metal contact when the rubber bushing flexes too far. So, I am still not clear on how the hybrid stop is supposed to make a difference.

As for the bushing in the pic, I only bought the bushing from Pelican and pressed it in. It worked out OK only because I have a 10 ton, shop grade, hydrolic press at home. Otherwise, it would've been impossible. Without a press, or even with a cheapo version from Harbor Freight, one shouldn't attempt it. It's a pretty hard push.
Yes, the part that actually moves relative to the cushion is the engine mount. The chassis is static relative to the cushion, so that side would see compression. The other side could see some sheer as well, thus the rubber face.
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Old 06-05-2012, 06:14 PM   #8
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Yes, the part that actually moves relative to the cushion is the engine mount. The chassis is static relative to the cushion, so that side would see compression. The other side could see some sheer as well, thus the rubber face.
After fooling around with this for a while, I took your advice; thanks.
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Old 06-27-2012, 12:04 PM   #9
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Hi - you show a picture of the motor mount stops in your post. I called the dealer and all they have is the old stops 986 375 255 01. I am replacing my motor mount and have the -05 new style one that you have pictured and as you pointed out the old ones don't fit. Do you have the part number for the new stops?
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Old 06-27-2012, 08:14 PM   #10
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Yes, P/N is: 9A1-375-257-01
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Old 06-28-2012, 06:48 AM   #11
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Found the answer - the new mount is from a Cayman so you use the Cayman's stop - part # 9A137525701.
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Old 06-28-2012, 06:52 AM   #12
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Sorry - posted before I saw your reply - thanks again.

I was able to complete the installation last night. I found that the old mount was cracked, new mount installed - vibration at 3000 - 3200 gone! Just like magic.
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Old 06-14-2019, 08:05 AM   #13
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Dudes..

Not the newest thread but letīs wake it up!

Iīm about to mount the 9A137525701, is there consensus on which way is in/ut? Not sure I read the dialogue correctly.
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Old 06-24-2019, 02:33 PM   #14
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Dudes..

Not the newest thread but letīs wake it up!

Iīm about to mount the 9A137525701, is there consensus on which way is in/ut? Not sure I read the dialogue correctly.
Today I got an answer straight from Porsche.. The black rubber-side shall be mounted inwards to the actual engine mount.

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