You can change the style the forum displays by selecting your preferred style at the bottom left of the site.
We have made an enhancement so that old threads should now link from search results to the correct thread. This is not yet in place for single post links
I have an original rubber one and can feel engine movement.
Any BTDT / Pros and cons for this please?
Cheers
Steve
The Perfectionist
sigpic
Audi Class Concours winner Stoner Park 2014, ADI Concours D'Elegance Class Winner 2008, Runner up 2014. Winner, S2Forum Show'n'Shine Billing 2006 & 2008.
when i had loads of work done on my car, i was told not to use one because they are rubbish..... The stock one went back on.
Thanks for the feedback!
The Perfectionist
sigpic
Audi Class Concours winner Stoner Park 2014, ADI Concours D'Elegance Class Winner 2008, Runner up 2014. Winner, S2Forum Show'n'Shine Billing 2006 & 2008.
Not lots of movement, just "spring" all engine mounts where new about 20 - 30k miles ago. (I can rock the engine front to back by hand and it "springs") Is there some adjustment available?
The Perfectionist
sigpic
Audi Class Concours winner Stoner Park 2014, ADI Concours D'Elegance Class Winner 2008, Runner up 2014. Winner, S2Forum Show'n'Shine Billing 2006 & 2008.
I am just looking into the snub mount on my coupe. I have the original hard rubber and original bracket.
In my spares lockup I have a snub mount buffer part number 8D0-199-339P. I am looking to modify the original bracket and fit this Mount, Insulator, Front Support Bushing, Front Support Cushion Bumper or whatever its called.
The reason for me looking into this is all to do with engine and drive chain movement. I would like to reduce the knock/slap from the system when coming off and on the accelerator.
I think its worth a try. I will do the mod to the bracket first and keep the original rubber support rubber and try the other support later if I need to.
For Steve (in UK) and Steve (in ZA), while it is not entirely clear to me that you are both describing the same issue, I believe that the solution to the shared portion of both your issues involves the same 5 parts all working best together. What that means is each must be properly sharing the appropriate loads as described below. These would be the 2 main motor mounts (which for brevity and they being the most robust of the 5, and are sized for the heaviest share of the loads, I am going to almost skip over entirely as I am assuming they are serviceable), the 2 tranny mounts, and by far the lightest, the snub/receiver (the 5th mount).
The main motor mounts are so strong vertically that they (despite their quite forward position, see the two C-shaped eng. mount chassis attachment brackets (grey) just forward of the sub-frame's (black) cross-member of Real Customs' photo below) act as the defacto fulcrum (or pivot) over which the eng./xmsn. assy. pitches up-down with all torque reversals (on and off the throttle). With applied throttle, the tranny moves down, the snub moves up; and vice versa. With applied throttle and against contact-patch traction, the pinion attempts to climb the ring gear in the diff., this is the root of eng/xmsn up/down pitch (the same thing happens at the rear diff, with predictably similar stock mount damage).
Even new stock tranny mounts (just like stock top-mounts and A-arm bushes), are well known to be too soon fatigued along their working axis (in this case vertically) to best resist eng./xmsn pitch (fore/aft up and down) and torque (left up-down/right down-up twist). Therefore, do not expect the snub alone to fix your issue, even if yours' appear serviceable. There isn't enough geometry or material in the snub/receiver to make up for even weakened tranny mounts. Further, weakened tranny mounts also pass the left-right twist of eng. torque to the main eng. mounts alone; which they should best not have to bare by themselves.
What the snub/receiver has, is the advantage of quite some distance (i.e.: leverage) from the fore/aft fulcrum around which the eng./xmsn pitches up/down. So the idea of the snub is that, without the tranny mounts having to be completely solid and unyielding, we can further restrain eng./xmsn assy up-down pitch with the relatively light touch of the snub and receiver (and note they are also sized accordingly, quite small, even compared to 2 tranny mounts) and still have some compliance in the tranny mounts for good NVH suppression. What is perhaps needed before a more effective snub/receiver is likely better tranny mounts, then attend to the snub. There are options, B5 and All-Road tranny mounts are two that come to mind. The B5s are a little stronger than stock, the All-Roads are a hydro-mount like the eng. mounts.
From under the car if one lifts on the tail-end of the tranny and can also lower it some distance, is evidence of slack in the tranny mounts that should be addressed there first before moving on to the snub. Evidence of a deformed or abraded snub elastomer or perceived movement can be a marker of already sufficiently weakened tranny mounts, if not simply a mis-adjusted snub receiver. Certainly this 3 location review (tranny and snub mounts in that order) is a part of what one can do to best address what Steve (in ZA) is describing with "knock/slap from the system when coming off and on the accelerator." but not all in my view (see also 'Arm-Stops'), and it may best address (UK) Steve's spring effect.
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
Comment