Engine mounts: OEM vs Aftermarket HEIGHT differences

[julex]

Hi all,

Look here (http://www.audizine.com/forum/showth...tick-for-b5-s4) and see damage that was caused by combination of Stern mounts and ECS dipstick which brought the combined height of engine + dip stick high enough to ding the hood when closed.

I certainly have problems with my sterns motor mounts. The additional height is causing my MAP to rub on the thermal blanket mount under the hood.

This begs a question of which aftermarket mounts are significantly taller than stock OEM units (or RS4) and which ones are not. We already know sterns are , but it would be interesting to see what other brands/models report.

I can't think of how to reliably measure this right now (early here!), anybody has an idea of what a repeatable measurement methodology would work to compare apples to apples on two different cars?

[01audia4]

I don't have any specifics but I can say both my 034 billets and street density did not cause any clearance issues with my MAP sensor and I am not running the factory TBB (which sits taller then stock)

SlowRide did make a good comment in that other thread, if sterns are that much bigger wouldn't it effect the snub mount?

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[LightningLou]

034 billet motor and trans mounts here and no issues. I am running the stock dipstick though, but clearances do not look any different than stock as far as everything else goes. Glad I don't have the Sterns. I really feel bad for the guy who dented his hood... I would be soo pissed.

[Zba]

I have no proof as they weren't measured but my buddy has the ECS mounts and we had to fab up some bs spacer to get mount his DTS bar to the trans

[zillarob]

My guess is things like aftermarket tbb and intake spacers make more of a difference here. You have either of these?

Im not really buying this motor mount thing. Making them the proper height is prob the easiest part of the whole mfg process.
I have installed almost every motor/trans mount available for our cars, and never had a prob with the oem stick.
But I do commonly see the hood liner chewed up from funny tbb or tbolt clamps on th ypipe, intake spacers just make it worse.

[DieselElectric]

Got the ECS mounts here with a very lightly trimmed 034 tbb, no rubbing that I've seen. I'll look for it tomorrow and update.

[killerkali]

Hi all,

Look here (http://www.audizine.com/forum/showth...tick-for-b5-s4) and see damage that was caused by combination of Stern mounts and ECS dipstick which brought the combined height of engine + dip stick high enough to ding the hood when closed.

I certainly have problems with my sterns motor mounts. The additional height is causing my MAP to rub on the thermal blanket mount under the hood.

This begs a question of which aftermarket mounts are significantly taller than stock OEM units (or RS4) and which ones are not. We already know sterns are , but it would be interesting to see what other brands/models report.

I can't think of how to reliably measure this right now (early here!), anybody has an idea of what a repeatable measurement methodology would work to compare apples to apples on two different cars?

You need to specify what TBB you are running as that is critical. I have 034 billets with a mishimoto TBB, my map rubs under the thermal blanket, I think it even put a small ding into the hood from repeated closes of the hood

[zillarob]

I think julex car is pretty badass and well modded.

It wouldnt surprise me if he had the works- spacers, bigger tbody, I do recall him having probs blowing the 034 tbb off in the past, but dont recall what the fix was.

[julex]

You're right, I am not a good example of what stockish motor clearances should be as I have RS4 manifold with 80mm Hemi throttle + IE boot. I started this thread to see if there are lower effective mount height options besides S4/RS4 mounts (although I might just go with RS4 mounts and call it a day when sterns die on me). As experienced in ECS thread, there is A LOT of height difference between broken in stock mounts and sterns for example, enough to ding a hood so perhaps about 1"...

[mikay1814]

I have 034 street density mounts, 034 intake spacers, and 034 tbb. My map has left a mark on the thermal blanket. No dent though. I did end up trimming the silicone to make the sensor sit lower though.

[FlyboyS4]

I've used stern mounts with a couple different manifold spacers and rs4 y-pipe and haven't had any issues I'd characterize as being a 'problem'.

Damage to the hood seems to be a rare occurrence, I cannot recall this being a problem over the 10 or so years the stern mounts have been a popular option.

[jibberjive]

There is definitely some slight variation in different motor mount heights, but most of the time it is not an issue. I think it manifests itself more in downpipe clearance/tweaking (on custom, super tight clearance stuff, like my GT exhaust manifolds), rather than most things up on top (other than that aftermarket oil level stick, obviously).

Though, as a data point, I, too, can say I've got some indenting in my hood thermal blanket from my MAP. I'm running Sterns, Samco TBB, Stock intake manifold/TB. I may even be able to dig up pics of hood-closed clearance that I took through an empty headlight socket with the hood closed, when I was doing research into intake manifold clearance.

For consistent measurement, maybe some reference point on the underside of the motor, and a reference point on the subframe somewhere. This seems more reliable than measuring the top of the engine to anything.

[jaychen]

Well this guy is running sterns with (i assume) the ECS billet dip stick:

Funny thing... I'm running stern engine mounts and still didn't run into any problems lol...

[Widowmakr]

Im running oem rs4 mounts with no issues. Just wondering, will those cause issues if I wanted that dipstick? :)

[christianb5s4]

In my opinion, I think the height of the engine/difference between those who have issues and those that don't is dependent on how people adjusted their snub mount. That can absolutely cause a difference in engine height, such as lifting the engine higher when setting the mount.

[slow ride]

The snub mount should be free to rotate when the engine is off. It's not meant to hold the engine in place, just stop excessive motion up, down, left or right.

[christianb5s4]

The snub mount should be free to rotate when the engine is off. It's not meant to hold the engine in place, just stop excessive motion up, down, left or right.

I know, but if you set the snub mount while the engine was higher than normal it could still hold the engine up which could cause these clearance issues.

[Zba]

In my opinion, I think the height of the engine/difference between those who have issues and those that don't is dependent on how people adjusted their snub mount. That can absolutely cause a difference in engine height, such as lifting the engine higher when setting the mount.

It would take serious effort to set the snub mount so high that the engine trans. assembly has pivoted on the engine mounts and are now compressing the trans mounts. The engine and trans mounts hold the assembly in it's installed position, as mentioned the snubber is more of a guide, it will rest where the other mounts dictate it will rest.

[christianb5s4]

It would take serious effort to set the snub mount so high that the engine trans. assembly has pivoted on the engine mounts and are now compressing the trans mounts. The engine and trans mounts hold the assembly in it's installed position, as mentioned the snubber is more of a guide, it will rest where the other mounts dictate it will rest.

Just an idea, I understand your point for sure. But it's not impossible, just offering a possible explanation.

[audacity]

wifes car has 034 solid motor/track trans and snub. stock everything else we have no markings on the thermal blanket

[Cacti]

Did anyone ever take any measurements or find the difference between stock/rs4 and sterns?

[jaychen]

I can measure bnib rs4 mounts this afternoon

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[zillarob]

Did anyone ever take any measurements or find the difference between stock/rs4 and sterns?

I dont see them being significantly different. Im sure the guys making them have calipers and measured the stock mounts.
If there is a height difference, prob has more to do with them being stiffer and not sagging.

It is mods in other places that are the actual causes of probs most of the time, intake spacers, funny tbb, longer dipstick, etc.
If needing to lower the engine, could open up sterns and remove however much you need from the lower puck to make up for those things.

[Kamil P]

You're right, I am not a good example of what stockish motor clearances should be as I have RS4 manifold with 80mm Hemi throttle + IE boot. I started this thread to see if there are lower effective mount height options besides S4/RS4 mounts (although I might just go with RS4 mounts and call it a day when sterns die on me). As experienced in ECS thread, there is A LOT of height difference between broken in stock mounts and sterns for example, enough to ding a hood so perhaps about 1"...

This is a good thread. We should start measuring the mounts and post the measurements here. I have stassis mounts on the car, i will try to get a measurement next time i will be working on it.

[y3ti]

probably 94.5mm w/o the bags
034 Motorsport mounts, Track density

I'm considering this my good deed for the day.

[zillarob]

Those are sweet mounts and you will love them, but the hardware kit that comes with them is el bunko.
They were capable of improving the mount itself, but I have no idea why they didnt improve the way it mounts while they were in there.

4 of these is what you want



I think they were the caliper to guide pin bolts off the front of an 05 Ford Freestyle. Any parts store prob has something similar.
m8 with a 13mm head and so much easier to use, especially on the tops.

[jbain2]

I have 034 street density mounts and a mishimoto TBB. My map hits the thermal blanket. I also have aftermarket bipipes which could change the angle of the TBB. Stock manifold.

Just picked up some 034 street mounts for my B7. Can measure them and put up measurements.

[zillarob]

Old clapped out stocker with god only knows how many miles





Stern soft (new)

[y3ti]

Those are sweet mounts and you will love them, but the hardware kit that comes with them is el bunko.

Gracias

[jaychen]

New RS4's measure 96mm on the dot.

[jbain2]

034 street density.

[cleveland222]

Great thread. Thanks everyone for all the great info. Running into some hood v. Y-Pipe clearance issues myself.
Seems to have conincided with the Phenolic spacers and RS4 Y-Pipe install.

Speaking of ultimate engine height......
Anyone know if the 034 Y-Pipe sits any lower?

Or if motor mount brackets vary in ultimate engine height, between model, as 2.7's from A6's and Allroads come with different brackets (part #'s at least).

Wondering how you could get the motor to sit an inch or two lower....

[ed-rod]

Just installed ECS mounts and had to enlarge the holes on the snubber mount and STILL had to put a jack under it to get the Allen screws on the motor. Not much pressure but still...

I would say the motor is at least a CM higher at the snubber. Could it be the tranny mount is down and that makes the front of the motor higher? Any thoughts?

[Kamil P]

Stasis/designit mounts (fresh bushings) 93mm height :

[jballou]

Old Skool

[Steve Bassen]

This seems like the best thread to drag up and talk about Stern mounts... cross posting from the B6 2.7 swap thread...

Anyone here running Stern motor mounts with their swap? I've got a B6 tiptronic subframe so it has provisions for the B5 trans mounts, and the combo of the Stern motor mounts and 034 street trans mounts (basically factory style) leaves the motor way higher than stock with a killer CV angle on the prop shaft exiting the trans. We made ~8mm spacers to stack with the trans mounts to alleviate most of this, but the snub mount still sits about 10mm too high to clear the 3.0 snub pocket in the core support since the engine sits so high with these mounts...The Stern mounts seem to sit the front of the motor significantly higher than stock, much more than the 5mm difference shown earlier in this thread?

[aysix]

This seems like the best thread to drag up and talk about Stern mounts... cross posting from the B6 2.7 swap thread...

Anyone here running Stern motor mounts with their swap? I've got a B6 tiptronic subframe so it has provisions for the B5 trans mounts, and the combo of the Stern motor mounts and 034 street trans mounts (basically factory style) leaves the motor way higher than stock with a killer CV angle on the prop shaft exiting the trans. We made ~8mm spacers to stack with the trans mounts to alleviate most of this, but the snub mount still sits about 10mm too high to clear the 3.0 snub pocket in the core support since the engine sits so high with these mounts...The Stern mounts seem to sit the front of the motor significantly higher than stock, much more than the 5mm difference shown earlier in this thread?

Me and another member swapped his tip b6 a4 and I'm pretty sure he's using stern with no issue. I recall the snub fitting though.