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Old 6th December 2017, 23:33   #11
clf
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Quote:
Originally Posted by minimutly View Post
What exactly are these top mounts - bearings?
top mount atop the the spring the bearing fits into the mount. Bearing can become worn, normally in the straight ahead position. So as you turn, it clunks. The grease can escape also, giving a grumbling noise and rough feel to the steering.



top mounts at the bottom of the image prior to fitting.



--------------------------------------------

Suspension as mentioned, best practice is replaced in pairs. Below are the rear struts from my car. It showed no obvious signs of any issue, and handled remarkably well, passed MOT 11 month prior. I never felt the need to do the 'bounce' test. But imagine if the left one showed weeping just before the MOT. You replace it, the right one, whilst looking corroded, doesnt show signs of weeping (it wouldnt, I guess lol). So you just replace the left one

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Old 6th December 2017, 23:40   #12
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The shock mountings( top mounts) have a compliant bearing which allows the joint to move, but restricts the amount of noise and vibration transmitted through to the chassis.
When they have failed and been removed they tend to fall apart
When the steering is turned left to right or right to left you will hear a clonk, it’s easy with a assistant to establish worn top mounts as one can turn the wheel while the other feels the spring, they will notice a twang effect from the coil spring.
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Old 6th December 2017, 23:45   #13
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Thanks, i have rumbling from the front susp, and its not arb drop links or bottom arm balljoints or bushes, so I suspect top mounts. So do i order top mounts or bearings, or both? I plan on getting new shocks, so getting all done together one sunny winters day.
I recal dmgrs stating that the bearings he sells also fit 25s, but I've had 25 struts in bits, and never seen a bearing worn, or had this rumbling rattle either?
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Old 6th December 2017, 23:49   #14
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Posts crossed, thanks for replying. I don't have the clonk on applying lock, just a rumble/rattle on rough roads (most around here).
So, new mounts and bearings?
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Old 7th December 2017, 00:00   #15
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Quote:
Originally Posted by minimutly View Post
Thanks, i have rumbling from the front susp, and its not arb drop links or bottom arm balljoints or bushes, so I suspect top mounts. So do i order top mounts or bearings, or both? I plan on getting new shocks, so getting all done together one sunny winters day.
I recal dmgrs stating that the bearings he sells also fit 25s, but I've had 25 struts in bits, and never seen a bearing worn, or had this rumbling rattle either?
The R3 top bearing is indeed the same, and the way the bearing is mounted in that application is much more satisfactory than the R40.

I have in the past recycled used bearings from a 200 to replace ones on a 75, and they were like new

Brian
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Old 7th December 2017, 07:50   #16
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Broken Coil springs seems to be almost an epidemic these days, I have lost count of the amount I have replaced.

I will say you rarely see one that has broken that still has paint on it, usually they are rusted or at least in the area where they have broken. Probably a combination of fatigue, rust and age. If you keep bending any piece of metal for long enough it will usually break.

The fact that most motor factors keep all the common ones in stock tells you how bad it is, they don't even carry spark plugs for some cars yet they will have new springs on the shelf for the same vehicle. ( MX5 )
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Old 7th December 2017, 13:34   #17
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They’re at that age now where springs breaking are all too common because of stress, rust etc. We will see plenty of this over the coming few years. I just hope people don’t scrap them because of it as springs are still easily obtainable and it’s not the biggest or expensive job...
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Old 7th December 2017, 13:55   #18
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Seeing the way that some people "monster" kerbs and speed bumps, it's hardly surprising that, along with pothole "clouts" and the reduced weight/structure of modern car springs, so many fail. I've replaced many a leaf spring in the past but mostly on HGV's that had to work hard for a living! (Still have the broken bone in my foot from dropping one off the side of the ramp - Ouch!)
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Old 7th December 2017, 17:15   #19
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Quote:
Originally Posted by kbonney88 View Post
As already mentioned - the 75's are not the only cars that suffer spring breakages.. it happens on all makes of modern cars. We just hear about it on our cars more due to the forum..

and as far as replacing in pairs.. up to you.. some say you should.. some not..

and I don't under normal circumstances.... that's just me though..

I will say that "normally" the top bearing and/or the isolator normally need changing after a spring snaps. That's what I have found when doing my cars..

Kev
We like to live life on the edge though and drive hundreds of miles with broken springs.......
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Old 7th December 2017, 22:49   #20
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Quote:
Originally Posted by Mickyboy View Post
Both will currently be the same age - if one has failed, it is likely that the other is in a similar condition and so could easily fail soon.
Too true. Several winters back, the NSF spring broke whilst reversing from cold, took out a virtually new Michelin winter tyre:



Couldn't move it, couldn't get a jack under it, so phoned my usual garage to ask them to recover it and sort it out in the warm & dry. They said they'd be over in a few days, fine by me as I had other vehicles to use.

Thought it odd a couple of days later that the Rover appeared to have regained a more normal attitude. Checked the other side, to find another bust spring and another new Michelin written off, with not so much as an attempt to move the car:



Both front springs had failed in the space of 3 days or so. Fitted tyre protectors after that!
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