What I discovered about my brakes while fiancé thought I was cleaning the house.

[Darwiniandude]

Ok, so this Paj has always had brakes that vibrate a little on heavy braking. Haven't been bothered investigating till now, but I should have. I'm pretty sure this is why:



Not good.

So, anyone know if the seal kits or whatever it is are available from normal auto parts stores or is it Mitsubishi specific? Typically, I found this at 5:01 PM when the shops had closed.

[schnitzel]

looks like you can get them fairly cheaply out of the uk, last parts i got from there arrived before the ones i ordered from the dealer on the same day

http://www.ebay.com.au/itm/Mitsubish...65406fe&_uhb=1

[Darwiniandude]

Thanks Schnitzel.

So I'm guessing it's not something likely to be carried by auto shops then? Doh.

[my.paj]

This is how my NM's fronts were and both pistons were buggered so I dropped them off at brake shop as I didn't have the time to do them.
Auto shop sold the kits for my NL

[dbomba]

PBR Part number for a front caliper kit for your model should be K3357S.
Repco or brake shop should have or can order, but get them to check the part number I have supplied above.

[Darwiniandude]

Based on experience, do you guys reckon I can just lightly sand the rust off a bit and do the seals or do I need to replace the pistons?

[geopaj]

I hate to be the barer of bad news but I highly doubt that would cause brake vibration.

Brake vibration (under brakes) is usually caused by brake disks (or drums) have too much run out. I'd be looking at getting your disks machined - it's not very expensive.

[Goodsy]

What does the metal look like under the rubber boot? Inside is not an issue.

[XXXceed]

You need to 'pop' the pistons out of the caliper with compressed air to determine the state of them. The vibration you feel is actually the disc rotors, they warp, which gives you brake shudder.my advice would be to have them machined swell as replacing the piston seals. I use ABS for my brake parts and machining, hope this helps.

[my.paj]

Based on experience, do you guys reckon I can just lightly sand the rust off a bit and do the seals or do I need to replace the pistons?

You will need to remove pistons to see what they are like, if pitted like mine they should be replaced.
Rick

[brianwanless]

It is the side of the piston that runs on the seal inside the caliper you have to check. Any pitting or marks that wont buff off means a new piston.
If you blow the pistons out with compressed air, put a block of wood in where the pad would go and keep your fingers out of the way. If you have not done a caliper overhaul before it might pay to drop them off at a brake shop. Brakes are for experts, your life and others depend on them.

[my.paj]

As above just as you think they wont come out with the compressor going flat out they go POP.

[Goodsy]

Cannot you just pump them out with the brake pedal? Has worked for me when I didn't want it to.

[my.paj]

Cannot you just pump them out with the brake pedal? Has worked for me when I didn't want it to.

Oh yeah or when the kids sit in the car and pretend to drive

[Darwiniandude]

Thanks for the tips guys.

I have rebuilt a caliper before on an 80's 300ZX, but that was back in 2005.

My rear discs don't look at shiny as the front, probably binding a bit. I'll go over everything tomorrow and see what bits I need to order.