Grp N Engine Mountings Vs Standard Oe

[NNPUT 2]

I need to replace the engine mountings and have seen alot of the GRP N mountings for sale. If i fit these in lieu of standard mounts will i end up with a lot more vibration and noise in the cabin due to the mountings being harder?

 

Thanks

 

Mark

[welshpug 1,631]

yes! I fitted some last year and whilst it reduced engine movement drastically over the tired, probably original and 23 year old mounts, I don't think they have a place on road cars, I found an original peugeot Bush on my own car to be just right.

[NNPUT 2]

yes! I fitted some last year and whilst it reduced engine movement drastically over the tired, probably original and 23 year old mounts, I don't think they have a place on road cars, I found an original peugeot Bush on my own car to be just right.

 

Cheers, i suspected that may be the case. I have already got an uprated lower mounting which i fitted when i bought the magnex system to reduce engine movement, that generates a little vibration at tick over.

 

I'll buy new OE items then!

[welshpug 1,631]

if you do have the 4 branch manifold I think it is a necessity to have the lower mount, it'll help the manifold last a little longer and not hit the bodywork.

[SurGie 54]

However, my gp n mounts did give vibration within the cabin, but once they were warmed up after a few miles I did not notice hardly any. I reccomend them very much.

[pug_ham 242 3 Cars]

As above, they vibrate for a while but settle down after a few miles or use (or maybe you just get used to it).

 

No real difference to noise though imo.

 

Graham.

[Baz 421]

Agreed, although if you do want to lessen the noise and vibration use standard top mount buffers and maybe the lower one too. Or you could even just go for a TD lower bush as they're only slightly stiffer than standard.

[24seven 104]

Once the full BBM group N mounts on my 205 Mi had covered a couple of hundred miles and settled in there was no real unpleasant cabin vibration at all. Initially I thought it would drive me nuts having the car on the road daily, but it didn't happen.

[Stevo309 0]

I had them on my 8v turbo in the 309 and they did increase the noise a vibration quite a lot. Not excessively though and it never got annoying, as others have said you get used to it and I even quite liked it, the car was stripped out with no carpets etc too.

[monkee87 2]

if you do have the 4 branch manifold I think it is a necessity to have the lower mount, it'll help the manifold last a little longer and not hit the bodywork.

 

Surely the manifold was designed to be far enough away at all times?? I've just fitted a full magnex system to my car.. I know I have a few rattles as I need to adjust it, tailpipe is hitting the valance and the dipstick tube bracket thing broke and now spins round to rest on the manifold...

 

You've got me thinking that I need to check if the manifold does hit the body now! I hope it doesn't!

[kb_205 11]

I need to replace the engine mountings and have seen alot of the GRP N mountings for sale. If i fit these in lieu of standard mounts will i end up with a lot more vibration and noise in the cabin due to the mountings being harder?

 

Thanks

 

Mark

 

 

Highly recommend BBM's GrpN Mountings . . . . No negtives in my opinion !!!!!!

[Daviewonder 533 3 Cars]

Worth looking at BBM's listings on eBay as a lot of the time it's cheaper than buying from the BBM website even with forum discount.

[SurGie 54]

I wonder if thats the same with the coolant pipes ?

[Henry Yorke 269 3 Cars]

Standard mounts for a road car, uprated for a track car. Just because it is uprated does not make it necessarily better.

 

Standard mounts for a road car, uprated for a track car. Just because it is uprated does not make it necessarily better.

[NNPUT 2]

Surely the manifold was designed to be far enough away at all times?? I've just fitted a full magnex system to my car.. I know I have a few rattles as I need to adjust it, tailpipe is hitting the valance and the dipstick tube bracket thing broke and now spins round to rest on the manifold...

 

You've got me thinking that I need to check if the manifold does hit the body now! I hope it doesn't!

 

I've never had a problem with the manifold hitting the bulkhead since i fitted it in 1997! I did fit an uprated lower engine mount though to reduce engine movement. Its getting a bit loud now after all the miles its done.

[allye 530 3 Cars]

Surely the manifold was designed to be far enough away at all times?? I've just fitted a full magnex system to my car.. I know I have a few rattles as I need to adjust it, tailpipe is hitting the valance and the dipstick tube bracket thing broke and now spins round to rest on the manifold...

 

You've got me thinking that I need to check if the manifold does hit the body now! I hope it doesn't!

 

Its not to stop it hitting the bulkhead or anything it just to reduce the vibration of the engine, thus through the exhaust. Increasing it life.

[Simes 248 2 Cars]

Surely the manifold was designed to be far enough away at all times?? I've just fitted a full magnex system to my car.. I know I have a few rattles as I need to adjust it, tailpipe is hitting the valance and the dipstick tube bracket thing broke and now spins round to rest on the manifold...

 

You've got me thinking that I need to check if the manifold does hit the body now! I hope it doesn't!

 

When new, these systems were supplied with a torque reduction bush, basically a stiffer lower engine mount.

 

I've run with a stiffer mounter for years, as mentioned they can vibrate the cabin but vibrations lesson after time.

Edited February 27, 2011 by Simes

[NNPUT 2]

When new, these systems were supplied with a torque reduction bush, basically a stiffer lower engine mount.

 

I've run with a stiffer mounter for years, as mentioned they can vibrate the cabin but vibrations lesson after time.

 

yeah i vaguely recall buying it new all those years ago from Aldon Automotive in Brierley Hill, West Midlands, i've still got the receipt somewhere!

[monkee87 2]

When new, these systems were supplied with a torque reduction bush, basically a stiffer lower engine mount.

 

I've run with a stiffer mount for years, as mentioned they can vibrate the cabin but vibrations lesson after time.

 

Might have to look into putting a GRP N mount on my car then. Didn't realize they came with one brand new.

[Baz 421]

They didn't afaik, they just came with a few spacers to put behind the top mount buffers and limit engine movement.

 

The problem is that there's always going to be a degree of movement between the engine and exhaust, because the manifold is solidly mounted to the engine that 'twists' on it's axis in effect, transferring the movement laterally to the exhaust, sending the movement downwards in the downpipe, then horizontally into the system under the car.

 

In the standard setup the manifold to downpipe join is designed to take up a little of this movement exactly where the most force occurs, in the diagonal (down)pipe, as once you no longer have that you need something to take it up, or it's transferred down the exhaust, which will move a little on it's rubber mounts, but as i say ideally needs to be in the downpipe because of the change in the direction, if not it often results in aftermarket (especially stainless) manifolds/systems cracking, hence magnex's commonly crack around the manifold flange and some other aftermarket manifolds have a flexi-section akin to some other manufacturers use, Ford Escorts for example, to take up the movement, and the Magnex's knockle-joint with springs is supposes to do the same job, but it's too late in the chain IMO, it needs to be in the diagonal downpipe to take up the movement there.