Brake pads.

For non EFI mechanical discussion
Posts: 1540
Joined: Sat Aug 06, 2011 7:58 am
Location: Padstow NSW

Re: Brake pads.

Postby Charlescrown » Wed Jan 12, 2022 3:54 pm

Those shims are supposed to reduce/eliminate squeal but I'm afraid some engineers think all cars need them.

User avatar
Posts: 7105
Joined: Mon Oct 08, 2012 6:41 pm
Location: Kyneton, Vic

Re: Brake pads.

Postby vlad01 » Wed Jan 12, 2022 5:57 pm

Those shims were never an issue when they were just a steel free floating shim but once they started rubberizing them and gluing them these issues showed up.

I thought I was crazy having worse brakes on the red VP vs the VR but now I know why.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.

Posts: 1540
Joined: Sat Aug 06, 2011 7:58 am
Location: Padstow NSW

Re: Brake pads.

Postby Charlescrown » Thu Jan 13, 2022 2:24 pm

There is a silicon based product that you smear on the pad contact patches to help reduce noises. I'm surprised that it caused a problem.

User avatar
Posts: 7105
Joined: Mon Oct 08, 2012 6:41 pm
Location: Kyneton, Vic

Re: Brake pads.

Postby vlad01 » Thu Jan 13, 2022 3:10 pm

I asked my mechanic about this and he confirms the same issue.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.

Posts: 3093
Joined: Thu Apr 09, 2009 12:31 pm

Re: Brake pads.

Postby immortality » Thu Jan 13, 2022 3:21 pm

Interesting. I'm sure the pads in the Calais have some sort of rubber backing on the shims. Might have to scrape it off and see what happens?

User avatar
Posts: 7105
Joined: Mon Oct 08, 2012 6:41 pm
Location: Kyneton, Vic

Re: Brake pads.

Postby vlad01 » Thu Jan 13, 2022 3:57 pm

I think it's less of an issue on bigger/better modern brakes as they often have very firm pedals with great braking effort for minimal input so it won't be so noticeable and also caliper flex is next to nothing on modern calipers.

With the old girls like VN etc.. there is more pedal travel out of the box, small pads for the force applied and flexible calipers, it all exacerbates the issue.

I actually thought there was something wrong with the rebuilt booster in the red VP as I upgraded to the VH512 as the VR has which amplifies the pedal force more than the stock booster, further exacerbating the sponginess. I will have to remove them at some point but I can't test the car as my brother chucked a spa in the way of the roller door saying it was only for a few days, that was 3 months ago :roll:
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.

Previous

Return to Engine/Transmision Mechanical

Who is online

Users browsing this forum: No registered users and 3 guests