Allen Key Size

SMC Trading · 10th December 2007, 11:17

Anyone know the size for the allen key on the rear calipers?

WeeMan · 10th December 2007, 11:22

7mm..............Merry Christmas! (said my message was too short! lol)

SMC Trading · 10th December 2007, 11:24

Quote:

Originally Posted by WeeMan

7mm..............Merry Christmas! (said my message was too short! lol)

Thank you, Merry christmas to you too...........just off to buy one, me calipers sticking

WeeMan · 10th December 2007, 11:28

Mine was the same at the start of the summer (check the fluid, mine was turning white!) have since changed the fluid and on the other back caliper when I was draining it, what looked like vaseline came out! (big difference now it's all new). Was told at the time that the fluid was going off which was causing a wee bit of rust, so causing the sticky caliper.

EnEnGee · 10th December 2007, 11:34

Agreed 7mm allen piece. I spent Friday afternoon checking my brakes. New pads on the back calipers (aren't they small?) and removed the fronts, cleaned the calipers and replaced the pads (7mm material left - 2mm is the minimum in Haynes). Pushed the old fluid through and just about finished by the time it got dark.

Unfortunately, I tried to save the wear sensors, but they both fell apart when I removed them so the light on the dash is still on until I get new ones.

WeeMan · 10th December 2007, 12:11

Same here!!, easy fix though. Strip the wires off each sensor and twist the wires together (remember to insulate them with black tape to stem the rot in the wire for the meantime). Gets the light off and easy enough when you get back to re-fitting new ones

T-Cut · 10th December 2007, 12:33

The guide pins are often a bit too tight for a standard Allen key. The keys tend to twist and the back of the caliper is a good place to take skin off your knuckles. You can get the 7mm Allens with a substantial right angled handle, specially made for calipers. Recommended.

TC

EnEnGee · 10th December 2007, 14:43

I used the type of hex driver from Halfords that are permanently fitted in a socket so you simply use a 3/8" ratchet. I have a variety of differing sizes for engine work in the past. They are about £4-5 a time, and it means you can use a torque spanner to torque the guide pins up correctly.

SMC Trading · 10th December 2007, 15:43

All done now........WD40 MARVELLOUS

10th December 2007, 11:17	#1
SMC Trading I really should get out more....... Rover 75 Join Date: Nov 2006 Location: Nr Harlow Posts: 2,872 Thanks: 1 Thanked 6 Times in 5 Posts	Allen Key Size Anyone know the size for the allen key on the rear calipers?

10th December 2007, 11:22	#2
WeeMan Posted a thing or two Mazda MX5, BMW 520i Join Date: Feb 2007 Location: Sunny Ayrshire Posts: 1,498 Thanks: 2 Thanked 4 Times in 4 Posts	7mm..............Merry Christmas! (said my message was too short! lol)

10th December 2007, 11:28	#4
WeeMan Posted a thing or two Mazda MX5, BMW 520i Join Date: Feb 2007 Location: Sunny Ayrshire Posts: 1,498 Thanks: 2 Thanked 4 Times in 4 Posts	Mine was the same at the start of the summer (check the fluid, mine was turning white!) have since changed the fluid and on the other back caliper when I was draining it, what looked like vaseline came out! (big difference now it's all new). Was told at the time that the fluid was going off which was causing a wee bit of rust, so causing the sticky caliper.

10th December 2007, 11:34	#5
EnEnGee Posted a thing or two CDT Tourer (SORN) & 2.0 V6 Saloon Join Date: Nov 2006 Location: Sittingbourne Posts: 1,058 Thanks: 2 Thanked 11 Times in 8 Posts	Agreed 7mm allen piece. I spent Friday afternoon checking my brakes. New pads on the back calipers (aren't they small?) and removed the fronts, cleaned the calipers and replaced the pads (7mm material left - 2mm is the minimum in Haynes). Pushed the old fluid through and just about finished by the time it got dark. Unfortunately, I tried to save the wear sensors, but they both fell apart when I removed them so the light on the dash is still on until I get new ones.

10th December 2007, 12:11	#6
WeeMan Posted a thing or two Mazda MX5, BMW 520i Join Date: Feb 2007 Location: Sunny Ayrshire Posts: 1,498 Thanks: 2 Thanked 4 Times in 4 Posts	Same here!!, easy fix though. Strip the wires off each sensor and twist the wires together (remember to insulate them with black tape to stem the rot in the wire for the meantime). Gets the light off and easy enough when you get back to re-fitting new ones

10th December 2007, 12:33	#7
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	The guide pins are often a bit too tight for a standard Allen key. The keys tend to twist and the back of the caliper is a good place to take skin off your knuckles. You can get the 7mm Allens with a substantial right angled handle, specially made for calipers. Recommended. TC

10th December 2007, 14:43	#8
EnEnGee Posted a thing or two CDT Tourer (SORN) & 2.0 V6 Saloon Join Date: Nov 2006 Location: Sittingbourne Posts: 1,058 Thanks: 2 Thanked 11 Times in 8 Posts	I used the type of hex driver from Halfords that are permanently fitted in a socket so you simply use a 3/8" ratchet. I have a variety of differing sizes for engine work in the past. They are about £4-5 a time, and it means you can use a torque spanner to torque the guide pins up correctly.

10th December 2007, 15:43	#9
SMC Trading I really should get out more....... Rover 75 Join Date: Nov 2006 Location: Nr Harlow Posts: 2,872 Thanks: 1 Thanked 6 Times in 5 Posts	All done now........WD40 MARVELLOUS