Parts list for brake job

[Terrorizer]

So its time for new pads on my 90 sho, and to my dismay I discovered that the rotors have grooves warn into them from the previous owner not changing the pads soon enough. (I never let them get that low). So naturally I know I will need new pads and rotors. I also noticed that one of the pads was significantly more warn than the other. I ASSume this is from a sticking caliper, correct? If so what do I need to do to correct that? I would hate to put new pads on just to have them wear unevenly again. While I am at it are there any other parts that are nessicary? Thanks for any help

 

[kevinspann]

Unevenly worn pads is generally due to sticking slider pins. If you clean them really well and regrease them they can work. Parts stores also sell new ones. Do you have stock brakes on your 90, or an upgrade?

 

[luigisho]

A little grease for the slider pins, brake fluid, you need a C clamp to press the front caliper piston in and a loan a tool to turn and press the rear caliper pistons in. You can use--fill in the blank-- but the correct tool always makes the job much easier. Maybe a dollar store spray bottle to stick the stem in the brake fluid res. and spray the old fluid out.

 

[Terrorizer]

Unevenly worn pads is generally due to sticking slider pins. If you clean them really well and regrease them they can work. Parts stores also sell new ones. Do you have stock brakes on your 90, or an upgrade?

I have stock brakes.

 

[RonPorter]

The inner pads normally wear more than the outers. You will be able to see if the slider pins are stuck when you pull the bracket off. Use dielectric grease on the sliders pins, not whatever grease you have in the garage.

WRT to rear calipers. I bought a big pair of needle-nose pliers in the $5 bin many years ago. Works fine for me for screwing the rear pistons in. Just make sure you crack open the bleeder screw when you twist them back in, or else it's near-impossible.

 

[Terrorizer]

Do you think it is a good idea to rebuild the calipers while I am doing all of this?

 

[FamilySHO]

Yes. When I've done it the rubber boot on the piston never seems to seat properly after it is compressed. Last rear caliper I compressed and re-used started leaking after a couple of months requiring the replacement of both the caliper and the pads. Rebuiult calipers are realatively cheap so save potential future work and replace it.

 

[RonPorter]

Yep, rebuilt ones are cheap.

But wait (if you can) until you get the old ones off and check the slider pins in the bracket. If you have one (or more) that are really stuck, get a set of loaded calipers that include the brackets for not much more money. And throw away the junk pads that come with a set of loaded calipers, or just save them as emergency spares, as they are very cheap, crappy pads.

 

[kevinspann]

Stock 90 SHO brakes mean no brackets.

 

[RonPorter]

I did the brakes on my '89 last year, and I'm trying to remember (first time I did brakes on a G1)!! IIRC, the rears have sliders?

Just remember I had to ask Kirk about the drill set he got at HF to get the proper drills to do a cleanup & hone job once I got the @#$%^&* pin out.

 

[kevinspann]

Oh, the rears do, yes. I've assumed he is doing the front.

 

[jayro]

Use dielectric grease on the sliders pins, not whatever grease you have in the garage.

Interesting, I had never heard of using dielectric grease on sliders. I always got the grease specified for brakes. Is dielectric better for some reason?

 

[Terrorizer]

you can buy completely rebuilt calipers? I thought you could just get the rubber boots for the pistons or whatever

 

[RonPorter]

Interesting, I had never heard of using dielectric grease on sliders. I always got the grease specified for brakes. Is dielectric better for some reason?

IIRC, what they sell you for brakes "is" dielectric grease.

 

[RonPorter]

you can buy completely rebuilt calipers? I thought you could just get the rubber boots for the pistons or whatever

Miscellaneous parts are available individually, but you can easily get rebuilt calipers, loaded or not.

 

[Terrorizer]

Miscellaneous parts are available individually, but you can easily get rebuilt calipers, loaded or not.

I assume rebiuld calipers are much more expensive, and what am I going to do with the old calipers? seems like I'd be spending a lot of money to replace stuff that isn't warn out, it would be much more convenient to just put on a a set of rebuild calipers though I suppose.

 

[FamilySHO]

Rebuilt calipers range in cost from about $30.00 to $70.00 depending on where you buy them and the brand. Virtually always you trade in the old units for the new and to make sure you do this there will be an additional core charge of about $25.00 to $100.00. The core charge is refunded when you return the old calipers. If you bring the old calipers when you purchase the new ones there will be no core charge.