The car would pull to the left on hard braking.
So its time to investigate the calipers.
I thought I would find old rusty calipers and rusty stuck pistons.
But it turns out the previous owner had fitted stainless steel pistons and pins.
But behind the rubber seals there was still much rust and maybe the pistons were sticky.
The calipers were dismantled and dipped in the rust dissolving solution.
After reassembly and painting in silver brake caliper paint I was advised by the forum that its
possible for the brake pads to stick in the caliper due to being the wrong size.
It was found that two pads were a tight fit in one of the calipers. These pads were 0.2mm wider than the others. They were all filed down so they loosely fit in the caliper. So now there should be no problem in the future.
Installing the rubber seals is a tricky task, but the best method was to fit the seal around the base of the piston, offer it up to the caliper, hook the lip in the groove and push in the piston to finish.
New bleed nipples and then the system was bled until air free.
Actually - not air free.. many times tried but still spongy.
A vacuum pump system was tried and also didn't fix the spongyness. Only using a willing helper to press the pedal and apply force while bleeding fix the spongyness in a few presses.
So its time to investigate the calipers.
 |
| new piston and seals |
I thought I would find old rusty calipers and rusty stuck pistons.
But it turns out the previous owner had fitted stainless steel pistons and pins.
But behind the rubber seals there was still much rust and maybe the pistons were sticky.
The calipers were dismantled and dipped in the rust dissolving solution.
After reassembly and painting in silver brake caliper paint I was advised by the forum that its possible for the brake pads to stick in the caliper due to being the wrong size.
It was found that two pads were a tight fit in one of the calipers. These pads were 0.2mm wider than the others. They were all filed down so they loosely fit in the caliper. So now there should be no problem in the future.
Installing the rubber seals is a tricky task, but the best method was to fit the seal around the base of the piston, offer it up to the caliper, hook the lip in the groove and push in the piston to finish.New bleed nipples and then the system was bled until air free.
Actually - not air free.. many times tried but still spongy.
A vacuum pump system was tried and also didn't fix the spongyness. Only using a willing helper to press the pedal and apply force while bleeding fix the spongyness in a few presses.
No comments:
Post a Comment