Z4m engine mounts
- Thread starter InterlagosMC
- Start date
Simon 3.2M
Senior member
I’m happy for people to try the race mounts if they like - that are just sat in the garage doing not a great deal.
These came fitted to my Z4MC and were causing major vibrations at idle, the whole interior was shaking as if at 6 on the Richter scale. Once on the move, no vibrations at all and needless to say I changed them for OEM mounts and all is well once more 
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^^ exactly my case, my mounts are cracked and the car vibrated noticeably at 870rpm idle. it is fine at 970 - 1k rpm idle. again, the issue not idle speed, I actually prefer a higher idle to keep good oil pressure, the issue is them cracking so soon. those that have them should go and check closely, I never noticed cracks until I removed the aluminum shield to clean it, then was able to see the rubber is dry and cracked, though a bit less than the above
I replaced my mounts this weekend, went with 034MS mounts, very nice, much smoother vs VT, and the shifting is equally good, at least in street conditions. even cranking the engine for startup, and engine shut-off is smoother. and you save 60grams if that matters
Old mounts (20k kms and 4 years). Rubber is cracking
New 034MS Mount
Old mounts (20k kms and 4 years). Rubber is cracking
New 034MS Mount
^^ Good to hear your positive results with the 034MS mounts and confirmation of my impression of them as you're only the 2nd person (other than myself) that I know of that are using them on the E85/E86 platform. I was made aware of the 034MS mounts on the E46M3 forum.
My VT street mounts looked pretty much like yours when I took them off and swap them for the 034MS about 1.5yrs ago. It didn't occurred to me to weigh them...so thank you for that info
My VT street mounts looked pretty much like yours when I took them off and swap them for the 034MS about 1.5yrs ago. It didn't occurred to me to weigh them...so thank you for that info
InterlagosMC
Member
Are you guys in the uk, can’t find anywhere that sells the 034ms mounts
Wassup said:These came fitted to my Z4MC and were causing major vibrations at idle, the whole interior was shaking as if at 6 on the Richter scale. Once on the move, no vibrations at all and needless to say I changed them for OEM mounts and all is well once more
i think i was one of the first that had these mounts and i actually tested the road and race versions for VT... i kept the race ones and sold the road versions. ive found these mounts to be absolutely excellent and in my application they've been put through ALOT of stress , not loads of miles but a whole heap of heat and twisting with a sprint track mostly use. I'm going to have a detailed look at mine this weekend and see how they look and report back.
I am loving the 034MS ones, before, I would not drive the car below 2k, it was too rough and grumpy, at 5-10km/h traffic when you let the car roll, if revs dipped below 1k, I would hear rattles, made me feel the car was falling apart. The new mounts allow me to drive from 900rpms to redline.
Now, I do live in a big city, so in stop-and-go traffic the VT mounts were awful. For those of you in the UK, think of driving though Downtown London in rush hour to get an idea.
Now, I do live in a big city, so in stop-and-go traffic the VT mounts were awful. For those of you in the UK, think of driving though Downtown London in rush hour to get an idea.
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.
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.
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.
InterlagosMC
Member
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 shapeBeedub said:
InterlagosMC
Member
Reviving this thread with a little update, I ended up fitting the street version 360m engine mounts to my vehicle last August and am now in the process of stripping the suspension for other work, on removing the front subframe the exhaust side engine mount is noticeably shorter than the intake side mount and they have only been on the car for 8 months and around 1k miles, nothing wrong with the performance as stated they reduce engine movement significantly and made the gear shift crisp too but I’m concerned how much that side has collapsed to the point that when I reinstall them I’m swapping the 2 round.
I know it’s a heavy lump of an engine on a slant to the exhaust side and I’m hoping that is just the mounts settling.
Before anyone comments everything was torqued to specs as recommended at the time of install as I do the work myself so am very careful and double check everything as I go
I know it’s a heavy lump of an engine on a slant to the exhaust side and I’m hoping that is just the mounts settling.
Before anyone comments everything was torqued to specs as recommended at the time of install as I do the work myself so am very careful and double check everything as I go
InterlagosMC
Member
Yes the heat shield was exactly as it came out on top of the exhaust side mount although I don’t think it makes much difference on eu car as in the us due to our headers not having big catalyst on them so they are further from the mountmaupineda said: