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Z4m engine mounts

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BMWZ4MC
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Z4m engine mounts

Post by BMWZ4MC » Sat Jan 28, 2023 8:17 am

I’ve had the race version of the VT engine mounts for about 9 years and 40k miles. My car has spent a great deal of time on track in ambient temperatures up to 35C and it is always driven in a spirited fashion for at least a part of every journey. They have yet to fall apart!
The only detectable change in NVH is at idle where there is a barely perceptible hum through the seat and the interior mirror vibrates enough to slightly blur images. Someone unfamiliar with the car would be unlikely to notice.
That said, having read the above, at some point soon I will check if the rubber is cracking.
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Beedub
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Z4m engine mounts

Post by Beedub » Sat Jan 28, 2023 8:58 am

BMWZ4MC wrote: Sat Jan 28, 2023 8:17 am I’ve had the race version of the VT engine mounts for about 9 years and 40k miles. My car has spent a great deal of time on track in ambient temperatures up to 35C and it is always driven in a spirited fashion for at least a part of every journey. They have yet to fall apart!
The only detectable change in NVH is at idle where there is a barely perceptible hum through the seat and the interior mirror vibrates enough to slightly blur images. Someone unfamiliar with the car would be unlikely to notice.
That said, having read the above, at some point soon I will check if the rubber is cracking.
I barely notice mine at all..... are people Tqing these down too much on install? ill be checking mine over today and as mentioned will report back.
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Z4m engine mounts

Post by Beedub » Sat Jan 28, 2023 2:21 pm

UPDATE ; work finished at 12pm today so headed back to the car with my makeshift inspection mirrors ( wifeys makeup mirror taped to a long strip of plastic lol!) inspected these both thoroughly, Zero cracking on mine at all. Still remains one of the best mods i believe you can make to this era of bmw. I notice very little in the way of additional NVH too, their is some but nothing at all alarming and very in keeping with my build. I can still see the competition spec manufacturing DOT ( orange in my case, blue for the road versions ). Maybe climate has something to do with degrading rates also us spec car have cats in the headers, this would give off significantly more heat. I believe the issues are likely related to incorrecting fitting tq specs or extreme heat build up ( mine has a heat guard on the drivers side ). interesting to note the failed mounts pictured in this thread the rubber almost looks very squashed out the main block piece where as mine are only pretty much flat (with a slight dome) with the top round metal disc.
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InterlagosMC
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Z4m engine mounts

Post by InterlagosMC » Sat Jan 28, 2023 10:44 pm

Beedub wrote: Sat Jan 28, 2023 2:21 pm UPDATE ; work finished at 12pm today so headed back to the car with my makeshift inspection mirrors ( wifeys makeup mirror taped to a long strip of plastic lol!) inspected these both thoroughly, Zero cracking on mine at all. Still remains one of the best mods i believe you can make to this era of bmw. I notice very little in the way of additional NVH too, their is some but nothing at all alarming and very in keeping with my build. I can still see the competition spec manufacturing DOT ( orange in my case, blue for the road versions ). Maybe climate has something to do with degrading rates also us spec car have cats in the headers, this would give off significantly more heat. I believe the issues are likely related to incorrecting fitting tq specs or extreme heat build up ( mine has a heat guard on the drivers side ). interesting to note the failed mounts pictured in this thread the rubber almost looks very squashed out the main block piece where as mine are only pretty much flat (with a slight dome) with the top round metal disc.
Thanks for the update, possibly down to torque specs and as you noted us market has cats on the headers, I’m looking to go for a street set up I think but it’s good to hear yours have lasted and are in good shape
2007 Z4M Coupe

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