Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Search Today's Posts Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 6th May 2021, 16:47   #41
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Middlesex
Posts: 17,851
Thanks: 1,136
Thanked 3,133 Times in 2,706 Posts
Smile The detective work continues

Quote:
Originally Posted by clf View Post
... are you sure they are M9?
That was a good question Alan. They're M10, but the spanner size has been increased from 15mm (OE) to 17mm (current). So I have bought two BZP nuts and reluctantly I'm going to have to get out the hacksaw.
Quote:
Originally Posted by cbr1100xx View Post
Moog droplinks from Euro Car Parts have the correct length threaded section ...
I've tracked these down and measured them. The threaded rod is 21mm long which is significantly shorter than the competition and yes, on the NS strut I can get a 17mm ring spanner over it! But on the OS I can't.
Why the difference? The strut is basically the same for both sides but with the ARB link mounting hole drilled in a different position. On the OS it is closer to the spring, hence the reduced clearance. In addition, these parts are not made to a precise tolerance.

I think you were very lucky with yours Stan!

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 6th May 2021, 16:54   #42
cbr1100xx
Gets stuck in
 
cbr1100xx's Avatar
 
mg zt+ cdti

Join Date: Mar 2015
Location: dunsop bridge
Posts: 781
Thanks: 202
Thanked 330 Times in 204 Posts
Default

Shouldn't be any difference in shock sizes,nor in the drop link so it might be your anti roll bar is twisted .
If the drop links are different lengths I would be returning them.
All gaps/distances should be identical on both sides.

Stan
__________________
WE WERE BOTH BORN ON THE 4th of JULY
cbr1100xx is offline   Reply With Quote
Old 6th May 2021, 17:21   #43
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Middlesex
Posts: 17,851
Thanks: 1,136
Thanked 3,133 Times in 2,706 Posts
Default

Quote:
Originally Posted by cbr1100xx View Post
Shouldn't be any difference in shock sizes,nor in the drop link so it might be your anti roll bar is twisted .
If the drop links are different lengths I would be returning them.
All gaps/distances should be identical on both sides.
Hi Stan,

Sorry, I haven't explained the situation very well. A photograph should help!



This is the OS strut. You can see the mounting hole for the ARB link on the left hand side. On the NS strut the hole is on the right.
The spring doesn't lie perfectly horizontally on its support, it rises gently upwards. If you measure the height of the ARB link's supporting channel, the left-hand side is shorter than the right, confirming that the spring wire is rising up a gradient. For two identical ARB links, this explains why there's clearance to fit a ring spanner on the right-hand mounting but not on the left.

I hope that's a clearer explanation.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
The Following User Says Thank You to SD1too For This Useful Post:
Old 6th May 2021, 18:04   #44
Ducati750cc
Regular poster
 
Rover75 tourer

Join Date: Jun 2018
Location: Ashton
Posts: 81
Thanks: 20
Thanked 43 Times in 33 Posts
Default

Quote:
Originally Posted by SD1too View Post
That was a good question Alan. They're M10, but the spanner size has been increased from 15mm (OE) to 17mm (current). So I have bought two BZP nuts and reluctantly I'm going to have to get out the hacksaw.

I've tracked these down and measured them. The threaded rod is 21mm long which is significantly shorter than the competition and yes, on the NS strut I can get a 17mm ring spanner over it! But on the OS I can't.
Why the difference? The strut is basically the same for both sides but with the ARB link mounting hole drilled in a different position. On the OS it is closer to the spring, hence the reduced clearance. In addition, these parts are not made to a precise tolerance.

I think you were very lucky with yours Stan!

Simon

The problem is caused by the spring seats not being handed as such, they have two protrusions for the link seats for the hole to be drilled for the top link bolt, either protrusion depending on n/s or o/s, yet the first coil stop is in the same spot.


The result of this is that on the o/s leg, the bolt hole is approx. 90mm from the spring stop and the height between the link seat and the bottom of the first coil is approx. 20mm.


On the n/s leg the hole is on the opposite protrusion approx. 45 deg away from the o/s hole and approx. 160mm from the spring stop and due to the coil obviously rising it is approx. 25mm from the link seat to the bottom of the coil at that point, 5mm higher than the o/s.


The measurements are approx. and the angle I did by eyeball, but the difference isn't obvious until you have a pair of legs side by side.


Hope this helps, off to give the legs and some other bits and bobs a waft over with a couple of coats of epoxy primer.
__________________
Common sense isn't a gift, it's a punishment because you have to deal with everyone who doesn't have it.
Ducati750cc is offline   Reply With Quote
The Following User Says Thank You to Ducati750cc For This Useful Post:
Old 6th May 2021, 18:08   #45
Ducati750cc
Regular poster
 
Rover75 tourer

Join Date: Jun 2018
Location: Ashton
Posts: 81
Thanks: 20
Thanked 43 Times in 33 Posts
Default

Quote:
Originally Posted by SD1too View Post
Hi Stan,

Sorry, I haven't explained the situation very well. A photograph should help!



This is the OS strut. You can see the mounting hole for the ARB link on the left hand side. On the NS strut the hole is on the right.
The spring doesn't lie perfectly horizontally on its support, it rises gently upwards. If you measure the height of the ARB link's supporting channel, the left-hand side is shorter than the right, confirming that the spring wire is rising up a gradient. For two identical ARB links, this explains why there's clearance to fit a ring spanner on the right-hand mounting but not on the left.

I hope that's a clearer explanation.

Simon

Oi SD1.............you beat me to it and a picture is sometimes better than a thousand words.
__________________
Common sense isn't a gift, it's a punishment because you have to deal with everyone who doesn't have it.
Ducati750cc is offline   Reply With Quote
Old 6th May 2021, 20:11   #46
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Middlesex
Posts: 17,851
Thanks: 1,136
Thanked 3,133 Times in 2,706 Posts
Default

Quote:
Originally Posted by Ducati750cc View Post
Oi SD1.............you beat me to it ...

I'm just glad that we're singing from the same hymn sheet!

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 03:34.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright © 2006-2020, The Rover 75 & MG ZT Owners Club Ltd