IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

What dimensions is the brake rotor guide pin?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

diplomaticm3
Posts: 13
Joined: Thu May 31, 2018 9:25 am
Year and Model: 2004 xc70
Location: dallas
Has thanked: 1 time
Been thanked: 0
United States of America
diplomaticm3

What dimensions is the brake rotor guide pin?

Post by diplomaticm3 » Thu Oct 17, 2019 6:56 pm

Anyone else use a substitute from a hardware store? I find it hard to shell out $80 for 4 x small pins.

Thanks in advance.



jimmy57
Posts: 6417
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 2 times
Been thanked: 186 times
jimmy57

Re: What dimensions is the brake rotor guide pin?

Post by jimmy57 » Thu Oct 17, 2019 8:30 pm

6mm-1.0 bolt 15 mm long
They are optional. the pin on head was to assure the wheel went on in one place if it were dynamically balanced on the car. That has not been done by tire stores in 25 years or longer. The bolt was used to hold rotors onto hubs for shipping prior to new vehicle manufacture. They are a mild convenience when you remove brake pads for pad change other rotor and hub repairs. If you leave them out nothing will happen. You may have worked on an American made car and found a round odd washer with rolled up "fingers" on the inside diameter. Those were for the same purpose, they hold drums on axles for shipping prior to vehicle build. Once removed they are not replaced as they have no purpose.



diplomaticm3
Posts: 13
Joined: Thu May 31, 2018 9:25 am
Year and Model: 2004 xc70
Location: dallas
Has thanked: 1 time
Been thanked: 0
United States of America
diplomaticm3

Re: What dimensions is the brake rotor guide pin?

Post by diplomaticm3 » Fri Oct 18, 2019 12:23 am

Really? Huh...that’s good to know.

I was under the impression that they “center” the rotor and prevent warping. But now that makes less sense to me as I’ve had other cars with this item removed & nothing happened.



User avatar
erikv11
Posts: 9288
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 65 times
Been thanked: 216 times
United States of America
erikv11

Re: What dimensions is the brake rotor guide pin?

Post by erikv11 » Fri Oct 18, 2019 9:48 am

For me they are more of a mild inconvenience, making sure the wheel lines up.


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

jimmy57
Posts: 6417
Joined: Fri Nov 12, 2010 9:25 am
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 2 times
Been thanked: 186 times
jimmy57

Re: What dimensions is the brake rotor guide pin?

Post by jimmy57 » Fri Oct 18, 2019 2:12 pm

On P3 they went with countersunk screws for this so you lose that assistance.



User avatar
abscate
MVS Moderator
Posts: 18883
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 222 times
Been thanked: 735 times
Trinidad & Tobago
abscate

Re: What dimensions is the brake rotor guide pin?

Post by abscate » Sat Oct 19, 2019 7:42 am

erikv11 wrote:
Fri Oct 18, 2019 9:48 am
For me they are more of a mild inconvenience, making sure the wheel lines up.
On my steelies, the pins are great as they help hold the wheel on as I replace.

For my alloys , they go into a single blind hole so they are a bit of a hassle

I guess they are like bacteria, some good , some bad


Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread

Post Reply