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 Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 16th November 2019, 14:28   #1
Blink
Posted a thing or two
 
Blink's Avatar
 
Rover 75 Saloon

Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
Question Rear calipers - no access to torque bolts

Rave page 149 (06-27) says the caliper fixing torques are as follows:



Which is all very well, but there's no room to get a torque wrench on any of the fixings in the first place.

Also, what on earth are 'Carrier to hub bolts'? They must be referring to the front calipers because my rear calipers only have 2 guide pins and 2 caliper to trailing arm bolts (as per nos 6 & 11 here) - there aren't any other fixings.
Blink is offline   Reply With Quote
Old 16th November 2019, 16:04   #2
Blink
Posted a thing or two
 
Blink's Avatar
 
Rover 75 Saloon

Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
Default

Quote:
Originally Posted by Blink View Post
.... there's no room to get a torque wrench on any of the fixings ....
Actually, that's not quite true. I can get a torque wrench on the lower caliper to trailing arm bolt, so that's now set to 64Nm. There's not enough room for the upper bolt though, so I've had to use a 13mm ring spanner (which isn't very long) and tighten it as much as I can.

I still have no idea how to torque the guide pins to 28Nm so it'll have to be an allen key and guesswork.

Quote:
Originally Posted by Blink View Post
Also, what on earth are 'Carrier to hub bolts'?
Anyone know the answer to this?
Blink is offline   Reply With Quote
Old 16th November 2019, 16:34   #3
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: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by Blink View Post
Also, what on earth are 'Carrier to hub bolts'?
From reading RAVE it seems that the caliper housing is the sliding part containing the pads.
The caliper carrier is the part bolted to the hub.

The torque wrench settings table actually says "Caliper to hub bolts", ceasing to refer to that distinction. Confusing isn't it.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 16th November 2019, 23:53   #4
Clickernick
Posted a thing or two
 
Clickernick's Avatar
 
Rover 75 Connie SE Tourer Triumph Street Triple R

Join Date: Aug 2009
Location: Bletchley, Milton Keynes
Posts: 1,163
Thanks: 75
Thanked 91 Times in 65 Posts
Default

I work on these caliper carrier to hub bolt quite a lot and i don't worry about torquing them up,,, I use a 13 mm pro-quality ring spanner and once done up to the bolt head , I use my weighted nylon hammer to apply a good handfull of wallop to the spanner, usually three taps to tighten. Never had any issues with any calipers or getting then off next shout either.
__________________

Real walnut interior. Original refurbished Forked Spokes 16” with Michelin Primacy 4 rubber, Pioneer AVH-Z9200DAB double din Wi Fi phone integration. Retrofitted twin front horns. 160 re-map. Revotec fan. Silicone intercooler hoses and ‘O ring’ replacement. Top hose thermostat. New walnut and smokestone steering wheel with cruise upgrade. Brembo Brakes. Ceramic coated rear Exhaust. L/engine mount, Hydramount, Bosch MAF. Focal Access Drivers and Focal Amp.
Clickernick is offline   Reply With Quote
Old 17th November 2019, 11:03   #5
Blink
Posted a thing or two
 
Blink's Avatar
 
Rover 75 Saloon

Join Date: Apr 2019
Location: Under the car
Posts: 1,840
Thanks: 210
Thanked 244 Times in 221 Posts
Default

Quote:
Originally Posted by SD1too View Post
From reading RAVE it seems that the caliper housing is the sliding part containing the pads.
The caliper carrier is the part bolted to the hub.

The torque wrench settings table actually says "Caliper to hub bolts", ceasing to refer to that distinction. Confusing isn't it.

Simon
The confusing bit is that there are 3 lots of fixings mentioned in the table when in reality there are only 2 lots of fixings. Here's a pic using Rave's terminology:



No part of the caliper (housing or carrier) fixes on to the hub - the carrier fixes on to the trailing arm - therefore there is no such thing as a 'Caliper to hub bolt'.

Blink is offline   Reply With Quote
Old 17th November 2019, 11:56   #6
Clickernick
Posted a thing or two
 
Clickernick's Avatar
 
Rover 75 Connie SE Tourer Triumph Street Triple R

Join Date: Aug 2009
Location: Bletchley, Milton Keynes
Posts: 1,163
Thanks: 75
Thanked 91 Times in 65 Posts
Default

Forget all the pictures. Just do the two bolts that affix the calliper to the rest of the car nice and tight and tidy,,,job done! You don’t need pics and numbers to show you how to use a spanner on two bolts. Use common sense!!! Oh yeah!! That’s not so common!! ��
__________________

Real walnut interior. Original refurbished Forked Spokes 16” with Michelin Primacy 4 rubber, Pioneer AVH-Z9200DAB double din Wi Fi phone integration. Retrofitted twin front horns. 160 re-map. Revotec fan. Silicone intercooler hoses and ‘O ring’ replacement. Top hose thermostat. New walnut and smokestone steering wheel with cruise upgrade. Brembo Brakes. Ceramic coated rear Exhaust. L/engine mount, Hydramount, Bosch MAF. Focal Access Drivers and Focal Amp.
Clickernick is offline   Reply With Quote
Old 17th November 2019, 12:35   #7
suzublu
This is my second home
 
suzublu's Avatar
 
rover 75 1.8 vvc club se wedgwood blue

Join Date: Aug 2009
Location: Seaton Carew
Posts: 26,880
Thanks: 65
Thanked 7,142 Times in 4,642 Posts
Default

Quote:
Originally Posted by Clickernick View Post
Forget all the pictures. Just do the two bolts that affix the calliper to the rest of the car nice and tight and tidy,,,job done! You don’t need pics and numbers to show you how to use a spanner on two bolts. Use common sense!!! Oh yeah!! That’s not so common!! ��

You seem to be making a mountain out of a molehill It's a simple job, don't make problems where there aren't any
suzublu is offline   Reply With Quote
Old 17th November 2019, 15:50   #8
Les4048
This is my second home
 
Les4048's Avatar
 
Rover 75 Tourer/ MG ZT-T 400

Join Date: May 2012
Location: Lhanbryde
Posts: 3,277
Thanks: 2,627
Thanked 1,523 Times in 869 Posts
Default

I don’t get all this torquing every bolt. Only bolts I’ve ever torqued is head studs and sometimes the wheel studs. I’ve never seen any garage torque brake calliper bolts etc, just tighten with a spanner


Sent from my iPad using Tapatalk
Les4048 is offline   Reply With Quote
Old 17th November 2019, 17:31   #9
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: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by Blink View Post
No part of the caliper (housing or carrier) fixes on to the hub - the carrier fixes on to the trailing arm - therefore there is no such thing as a 'Caliper to hub bolt'.
Doesn't that description apply to the front brakes?

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 17th November 2019, 17:57   #10
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: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by Les4048 View Post
I’ve never seen any garage torque brake calliper bolts etc ...
I don't doubt it and that's one reason why I don't let garages repair my cars.

I recall reading many threads where members ask for advice about brake servicing and the point is always driven home that this part of the car is of the utmost importance. When a torque figure is specified for something which is critical in terms of safety, it should be adhered to whenever possible, but extending this principle to other parts enhances reliability and a feeling of confidence.

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. The time now is 20:04.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd