Question about brake shims..
07-20-2010, 05:39 PM
#1
Registered Member
Thread Starter
Question about brake shims..
When I replaced my factory original front pads on my '04 manual with a set of Rotex Gold Kevlars four years ago, I didn't remove and reuse the shims from the OEM pads. I still have those pads with the original factory shims attached. I just ordered another set of the Rotex pads because I suspect I will need to put them on the car in the next few months and I am considering using the original shims.
My question is what is the best solvent or cleaner to use on those shims to get them into like-new condition? Also, what sticky substance do you folks use on your shims to afix them to the back of the pads?
I have never had any problems with not using the shims on the Rotex pads, but since the shims are a polished stainless steel, I imagine they will prolong the life of the caliber pistons.
Comments and suggestions are most welcome.
My question is what is the best solvent or cleaner to use on those shims to get them into like-new condition? Also, what sticky substance do you folks use on your shims to afix them to the back of the pads?
I have never had any problems with not using the shims on the Rotex pads, but since the shims are a polished stainless steel, I imagine they will prolong the life of the caliber pistons.
Comments and suggestions are most welcome.
07-21-2010, 07:26 AM
#3
No separate shims on the fronts with the Brembo as they are part of the pad assembly, so I would just use an anti-squeal lube on the back of the pads, but Acura recommends Molykote M77 assembly lube between the shims on the rear, I believe 2 inside 1 outside. I've always used anti-squeal lube on the back of the all pads, or shims that come in contact with the piston(s) to avoid possible high pitch noise while under light braking, and on the non-piston side where the caliper comes in contact with the back of the pad. Although the shims are in place to minimize the noise, they can also be problematic.
As far as cleaning the rear shims, I'd use good old brake cleaner and a towel.
As far as cleaning the rear shims, I'd use good old brake cleaner and a towel.
Last edited by Turbonut; 07-21-2010 at 07:31 AM.
07-21-2010, 08:14 AM
#4
Full of water...
when i did my brakes a while back i did not re-use the shims, or get new, and all seems fine and dandy. and like Turbonut said, a grease/lube is key to making everything work properly. i wasnt picky on what i used, just picked up whatever the local auto store carried.
07-21-2010, 08:46 AM
#5
Registered Member
Thread Starter
No separate shims on the fronts with the Brembo as they are part of the pad assembly, so I would just use an anti-squeal lube on the back of the pads, but Acura recommends Molykote M77 assembly lube between the shims on the rear, I believe 2 inside 1 outside. I've always used anti-squeal lube on the back of the all pads, or shims that come in contact with the piston(s) to avoid possible high pitch noise while under light braking, and on the non-piston side where the caliper comes in contact with the back of the pad. Although the shims are in place to minimize the noise, they can also be problematic.
As far as cleaning the rear shims, I'd use good old brake cleaner and a towel.
As far as cleaning the rear shims, I'd use good old brake cleaner and a towel.
What I am primarily concerned about is any potential damage to the pistons with not using the shims. I didn't use them on the Rotex pads I installed 61,000 miles ago and have not experienced any "felt" problems. The shims, being a polished stainless steel, should reduce friction between the piston cups and the shims versus the piston cups and the backs of pads without the shims. However, I have never had shims on previous pads that I have replaced with other cars, so this is new to me, hence my questions.
07-21-2010, 08:51 AM
#6
Registered Member
Thread Starter
I used NAPA Sil-Glyde on the rears of the new Rotex pads when I installed them. Now a search turns up that this stuff is not the best product to use. What is your recommendation for a quality lubricant for the rear of the pads for our cars?
07-21-2010, 08:55 AM
#7
Registered Member
Thread Starter
No separate shims on the fronts with the Brembo as they are part of the pad assembly, so I would just use an anti-squeal lube on the back of the pads, but Acura recommends Molykote M77 assembly lube between the shims on the rear, I believe 2 inside 1 outside. I've always used anti-squeal lube on the back of the all pads, or shims that come in contact with the piston(s) to avoid possible high pitch noise while under light braking, and on the non-piston side where the caliper comes in contact with the back of the pad. Although the shims are in place to minimize the noise, they can also be problematic.
As far as cleaning the rear shims, I'd use good old brake cleaner and a towel.
As far as cleaning the rear shims, I'd use good old brake cleaner and a towel.
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