Rear Damper lower bolt query - Page 2

Billy1mate · 4th February 2014, 18:48

They damper bolts should be thread locked in, regarding your washer, could it be rust in the bolt hole?

BigRuss · 4th February 2014, 18:51

Quote:

Originally Posted by T-Cut

The PD Guide indicates 75 diesels and all MGs got the damper. Presumably petrol 75s don't apply according to this (Item 27): http://www.the75andztclub.co.uk/foru...ad.php?t=34369

TC

Post PD petrol models did have the harmonic weights fitted I have some that I removed from an 04 plate Rover 75 1.8T saloon

Russ

chris75 · 4th February 2014, 19:06

Quote:

Originally Posted by Billy1mate

They damper bolts should be thread locked in, regarding your washer, could it be rust in the bolt hole?

The "guide pin" end of the old bolts was indeed rusty ; the threads were quite clean and did have thread lock on them , as do the new bolts. I am wondering if there is a small variation in the width of the new shocker lower mounting to allow for the addition of the later harmonic damper

If that proves to be so , an extra washer should solve it . We will see

Bolin · 4th February 2014, 21:43

I fitted a new Genuine shock and it seemed the same as the one that came off - not made by Delphi now though.

chris75 · 15th February 2014, 10:54

Just to finish this tale off , I have stripped the lower ends out again and compared old and new . The problem is with the new bolts from Rimmers , which are not OE stock as those are NLA . The "nose " on the bolt is about 2mm shorter , leaving the thread about 2mm longer and this means the bolt bottoms out in the trailing arm hole before the damper is properly clamped . options are another washer under the bolt head , or reuse the old bolts . I reused the old ones

Piccy for comparison showing old and new ( oddly, the threads look rounded off in the pic ; they are normal in real life ! ) :

Bolin · 16th February 2014, 17:44

Interesting. I had a new bolt fitted in one side last September and no problems

David Lawrence · 16th February 2014, 17:54

Quote:

Originally Posted by chris75

Agreed , that is what I will do

It has occurred to me that perhaps the new shocks ( Sachs) might have a slightly narrower mounting at the bottom

I bought new bolts from Rimmers as well and it wouldn't tighten up on the washer, so resorted to putting the old bolt back in. That tightened up fine.

Maybe Rimmers have the wrong size listed.

Typhoon190 · 17th July 2020, 21:08

Unfortunately while tightening the rear damper to trailing arm bolt, the thread has stripped.

Will have to helicoil. Hoping it will handle the required torque.

macafee2 · 17th July 2020, 21:19

Quote:

Originally Posted by Typhoon190

Unfortunately while tightening the rear damper to trailing arm bolt, the thread has stripped.

Will have to helicoil. Hoping it will handle the required torque.

The only way I can think of that happening is if the bolt was cross threaded, was it cross threaded? I found getting it in line took quite a few attempts. A google search shows that it should

macafee2

Mike Noc · 18th July 2020, 08:45

Quote:

Originally Posted by Typhoon190

Unfortunately while tightening the rear damper to trailing arm bolt, the thread has stripped.

Will have to helicoil. Hoping it will handle the required torque.

If you use a decent Helicoil it should be stronger than the original thread.
I had one bolt pick up and damage the thread whilst removing it but luckily I had a tap the right size (bought in error a few years ago!) that cleaned the thread up.

4th February 2014, 21:43	#14
Bolin This is my second home Rover 75 2.5 V6 Connoisseur SE 4dr manual Wedgewood Blue 2 04-05/06/2001 Join Date: Nov 2006 Location: N.E. Hampshire Posts: 4,617 Thanks: 289 Thanked 308 Times in 243 Posts	I fitted a new Genuine shock and it seemed the same as the one that came off - not made by Delphi now though. __________________ "...the new Rover 75, which is a fabulous car......I think it looks fabulous....It's like sitting in a Rolls Royce......For me, this is the star of the show.....it looks so good" - J. Clarkson, motoring journalist on the launch of the Rover 75 in 1998.

16th February 2014, 17:44	#16
Bolin This is my second home Rover 75 2.5 V6 Connoisseur SE 4dr manual Wedgewood Blue 2 04-05/06/2001 Join Date: Nov 2006 Location: N.E. Hampshire Posts: 4,617 Thanks: 289 Thanked 308 Times in 243 Posts	Interesting. I had a new bolt fitted in one side last September and no problems __________________ "...the new Rover 75, which is a fabulous car......I think it looks fabulous....It's like sitting in a Rolls Royce......For me, this is the star of the show.....it looks so good" - J. Clarkson, motoring journalist on the launch of the Rover 75 in 1998.

17th July 2020, 21:08	#18
Typhoon190 This is my second home MG ZT-T 190 Monogram Typhoon Join Date: Jan 2009 Location: Oxfordshire Posts: 4,704 Thanks: 328 Thanked 557 Times in 443 Posts	Unfortunately while tightening the rear damper to trailing arm bolt, the thread has stripped. Will have to helicoil. Hoping it will handle the required torque. Last edited by Typhoon190; 17th July 2020 at 21:12..

4th February 2014, 18:48	#11
Billy1mate Posted a thing or two 120d M Sport Join Date: Feb 2012 Location: Sunny Weymouth Posts: 1,815 Thanks: 153 Thanked 142 Times in 121 Posts	They damper bolts should be thread locked in, regarding your washer, could it be rust in the bolt hole?