Lower Engine Mount OEM vs Others.

[MrLongbeard]

Yup it's a diesel, profile updated

Wish bones & bushes are being replaced this weekend so I'll give them a look see.

Are you seeing much difference between using the supplied steel insert and reusing the nylon original centre? Looks like I may have to go bin delving and recover the old part if so

[Arctic]

Originally Posted by MrLongbeard

Yup it's a diesel, profile updated

Wish bones & bushes are being replaced this weekend so I'll give them a look see.

Are you seeing much difference between using the supplied steel insert and reusing the nylon original centre? Looks like I may have to go bin delving and recover the old part if so

The original insert make a lot of difference night and day I think also stops the power flex from going oval from the movement 1mm maybe less when the bolts goes through I would fit it personally cheers Arctic

[ceedy]

Originally Posted by Arctic

The original insert make a lot of difference night and day I think also stops the power flex from going oval from the movement 1mm maybe less when the bolts goes through I would fit it personally cheers Arctic

I've got the PF all steel tube fitted, And often seen all the mentions of the original tube /nylon being better ??? .

But surely ??? .. we are talking only a very tiny difference ?? , and
both the steel tubes are clamped tight in the chassis mounting , so vibration must be transferred through this rather than the nylon liner ? as none of it should be moving ??



Chris

[Arctic]

Originally Posted by ceedy

I've got the PF all steel tube fitted, And often seen all the mentions of the original tube /nylon being better ??? .

But surely ??? .. we are talking only a very tiny difference ?? , and
both the steel tubes are clamped tight in the chassis mounting , so vibration must be transferred through this rather than the nylon liner ? as none of it should be moving ??



Chris

Hi Chris,
There is a very small amount of play ie gap round the bolt and the power flex steel tube and I think this is what is making the vibration travel through body, theory only not proof mind.

Sounds as vibrations can travel through many different materials sound can travel through solids, like metal, stone and wood.

Sound vibrations travel better through some materials than others. For example, sound vibrations travel very well along metal pipes.

Resonance occurs when a system is able to store and easily transfer energy between two or more different storage modes (such as kinetic energy and potential energy in the case of a pendulum). However, there are some losses from cycle to cycle, called damping. When damping is small, the resonant frequency is approximately equal to the natural frequency of the system, which is a frequency of unforced vibrations. Some systems have multiple, distinct, resonant frequencies.

above from the net hopefully going a little way to what I am think with regards to the vibration from power flex insert to original with nylon insert again all theory

[ceedy]

When I get a moment ,
and having the benefit of a lathe in the workshop

I will knock up another centre tube that allows the use of thick nylon spacers at each end to cut out the metal to metal contact , just to see if it makes any difference.

Pity I binned my old tube otherwise it would be just some stepped washers for each end

This year is my " lets get rid of the small vibes appearing in the ZT"

Chris

Originally Posted by Arctic

Hi Chris,
There is a very small amount of play ie gap round the bolt and the power flex steel tube and I think this is what is making the vibration travel through body, theory only not proof mind.

Sounds as vibrations can travel through many different materials sound can travel through solids, like metal, stone and wood.

Sound vibrations travel better through some materials than others. For example, sound vibrations travel very well along metal pipes.

Resonance occurs when a system is able to store and easily transfer energy between two or more different storage modes (such as kinetic energy and potential energy in the case of a pendulum). However, there are some losses from cycle to cycle, called damping. When damping is small, the resonant frequency is approximately equal to the natural frequency of the system, which is a frequency of unforced vibrations. Some systems have multiple, distinct, resonant frequencies.

above from the net hopefully going a little way to what I am think with regards to the vibration from power flex insert to original with nylon insert again all theory

[wuzerk]

I removed my modified Powerflex metal insert today and fitted an original centre tube and plastic insert kindly supplied by Arctic. On my car, which is a severe case, the vibration appears to be exactly the same at tickover I'm afraid. If anything it was slightly harsher around the 40s and 50smph. It was interesting to run the car on tickover and feel for the vibrations at the lower mount. The small end was working quite hard but, at the large ends bolt there was hardly any vibration worth noting and yet the steering wheel and seats are still vibrating?
I can only think of two other paths for the shakes to reach the seats and that is via the exhaust or via the gearbox/halfshafts/trackrod ends/steering rack/
and up the steering column. Have I missed somewhere? (I have changed the passenger side top mount and the Hydramount seems to prevent the strong vibration at the engine from reaching the inner wing to which it is bolted).

[Arctic]

Originally Posted by Rover Link

Hi all

We received our new batch of mountings last week and they have now got a genuine part number stamped on them so i would assume that xpart are now going to start supplying them. The part number on them is KKH101372 for the 1.8s.

Originally Posted by Arctic

Hi Ken
Thats all well and good but is there another part number for the diesel and other petrol variations or is it one fits all cheers Arctic.

PS i have replied to your PM

Originally Posted by crofts

Can't see them making one for diesels as their models are all petrol aren't they ?
I can see that forces/vibrations in line with the mount are absorbed by the bush but in the other direction is it not acting on the bolt, not the bush ?

Originally Posted by divemaster

Arent the chinese as good and cheaper,or am I on the wrong tack?.

Originally Posted by MrDoodles

I'd never fit a Roewe mount to a CDT, as the Chinese have never made a diesel engined car and the vibrations and harmonics coming from a diesel engine are completely different to that of a diesel unit!

If I owned a CDT, the only mount that I'd fit, is this one!

http://www.rimmerbros.co.uk/Item--i-KKH101402

Originally Posted by mss

Only time will tell, but my money would be on not by a million miles (so to speak). This is based on my experience of chinese manufactured quads, lawnmowers, carbs etc.

In any case, as your car is a CDT, the genuine MGR item is the only viable option at this time.

I got mine from the College Motors - their price is quite a bit cheaper than most Xpart suppliers.

http://www.rovermgspecialist.co.uk/i...product_id=298

Given that this part deteriorates with mileage and time, I would suggest investment in a new one - it's not a lot of money for 100k miles and 8-9 year lifespan.

Originally Posted by divemaster

Thanks guys.I will probally steer clear of the chinese one.

Originally Posted by philfatkid

Very wise, i fitted the chinese one to my diesel and it failed after 2 months, they are not up to the job, had to replace it with rover part from Rimmers.

Originally Posted by ceedy

Just to report ..... been under the ZT now the rain has gone ...

The later model Yellow Powerflex diesel bush, kindly sent by Artic and P-Flex is still installed ok , and with my mounts being slightly out of line its still in place after 10,000 miles .. .. only another 80k to go to match the OEM original fit ..

Chris

It as been nearly 2 years now since this thread was started and I think it still remains that only three mounts can cope with the diesels OEM, power flex and the Ford Mondeo


Remember that the Chinese mounts have not worked on the diesel as we can see from the post below and also Rover link are no longer selling them for the diesel so be careful of using them on the CDT or the CDTi

Do any members have any up to date news on any of the above ? if so let us know

Original OEM ones are still available from here
http://www.rovermgspecialist.co.uk/MGZT-rover-75-car-parts/MGZT-rover-75-new-parts?product_id=251

And the power flex are also still available and see to be standing the test so far
http://www.ebay.co.uk/itm/120998119145?_trksid=p2059210.m2749.l2649&ssPageNa me=STRK%3AMEBIDX%3AIT

Mondeo mount I have not had any testing done with this but it as been reported as being good

https://www.ebay.co.uk/itm/FOR-FORD-....c100012.m1985

[steveo]

Hi Arctic
I have fitted various mounts to my car after the failure of the oem version.

I have written several posts on the subject.

I am currently using the Roverlink version that still has a slightly vibration at the pedal box at around 1800 rpm

I was using an adapted citroen (I think )bush that was modified and found that to be satisfactory having tried the Mondeo mount previously

The Mondeo mount was machined down to fit in the oem teardrop mounting and was used quite successfully however because I have nothing to compare these products to I am not able to say if the original would be any better as the mounting had gone when I purchased the car..
I will post some photographs to show the mountings tonight


Attachment 42373 Mondeo mounting in a 75 housing (2 spacers required on large end)

Attachment 42374

Attachment 42375 Citroen / Renault before it was machined to fit
Regards
Steve

[NigelOBB]

An interesting thread. One of my cars is desperate, for a lower mount. I'm trying to weight up the cost of a OEM against the Ford Mondoe one and the time it takes to adapt the latter at moment.

[MSS]

My new MGR (UK) OEM mount has ben on nearly 2 years and in that time there has been no issue with vibration, sound transmission etc.