Durability of aftermarket motor mounts

[UweM3]

anybody seen these?

http://www.revshift.com/shop/index.php?_a=viewProd&productId=67

[ken garchow]

mmm
what does "not decoupled mean? sorry

and does anyone that has had a group n failure recall what the inside looked like from memory. i am under the impression that the two studs are not hooked together in the middle in any fashion.
thanks

[MMMM]

Hello Markus,

That is an interesting design ... the bolt is not decoupled though so this only addresses the vertical movements and not the lateral ones. If the bolt broke I am not sure if this would hold together. What is the aprox. cost of these?

My Gr.N mounts are not anywhere near their end of life cycle so unless this can wait a couple of years we need to have another volunteer to take them apart ...

[UweM3]

Someone with a genuine Grp N mount needs to "take one for the team", cut it apart, and post its inner secrets here.

Not me of course.....someone "else".........:idea:

well, not me this time. I only cut cylinder heads, blocks and 215bhp exhaust valves apart (which are NOT sodium filled BTW).
I am sure there is the odd old worn out Grp N mount lying on the shelf somewhere. Not much worth really.

[ken garchow]

i like the looks of the ones marcus posted here
anyone know a source
thanks

[Ironhead]

Someone with a genuine Grp N mount needs to "take one for the team", cut it apart, and post its inner secrets here.

Not me of course.....someone "else".........:idea:

[ken garchow]

UweM3
doesnt the part in the center take compression and tension as it is screwed into both the upper and lower mount caps? and the center part is bonded together.

i have recently heard the group n mounts are similar with plates bonded to the material not captures inside or interlocked.

would be nice to see a broken group n to get a better idea of its construction

[UweM3]

Very interesting design that makes sense. Even if the bushing failed, the assembly would not allow the motor to move forward. Great idea.

if the little silent block rips apart, whats holding it together? all of these blocks are designed for compression, not tension

[LeeVuong]

Very interesting design that makes sense. Even if the bushing failed, the assembly would not allow the motor to move forward. Great idea.

[Markus]

i know a few rallye drivers here in germany who are using these ones here without problems....but the cars are only for racing






Markus

[UweM3]

I'm planning to use the ice hockey puck/pucks, sandwiched by aluminium plates, threaded so i can tighten them up. I have yet to make them, but this is the idea so far.

Don't use aluminium plates. I would recommend against this solution with your engine setup, it's not going to last very long.

[215m3]

I'm planning to use the ice hockey puck/pucks, sandwiched by aluminium plates, threaded so i can tighten them up. I have yet to make them, but this is the idea so far.

[jimmy p.]

also what side usually fails in normal fails on motor mounts, header side?
thanks

For me it was usually the tension side (drivers) that failed more often.
Just pulled them in half (tears the top off).

[ken garchow]

any photo of OEM broken group n mounts?
i want to see what the inside looks like
so we might learn from them

also what side usually fails in normal fails on motor mounts, header side?
thanks

[jimmy p.]

^ Jimmy is my effing hero. Probably the #1 E30 M3/S14 fan if there ever was one.

Jake

Haha Jake,,, I am humbled,,, thats high praise coming from a man who has (at minimum) an entire E30 M3 in parts "in" his house and invents tools to better service his S14.
Cheers
jimmy