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« Last post by glhx on Today at 05:27:22 AM »
I’m at the point where I’m going to have to isolate and cap the system. Possible trying to use a union and putting a bleeder screw at the union. Right before the passenger side caliper.
The calipers have 3 seals in them. The shaft seal, the piston seal, and a large seal inside the piston.
The rebuild kit comes with 2 of these and not the third one. It does not come with the seal for the ratcheting system inside the piston. Which makes me wonder if these rebuilders are using kits and not replacing that one. At first I thought it was an o ring, but it’s not.
The yellow seal on the outside of the piston is a check valve of sorts. It’s easy to take off. You should be able to blow into that hole and it should be sealed. Because of the large seal inside the piston that seals all of that.
If any of those are pulling in air due to pitted metal, Bad clearances, or cheap parts, I can see where a caliper will pull in air. I’m thinking the shaft seal is where. Mainly because I saw an air bubble come out of it when I was adjusting the e brake lever. I looked over it and thought Since it was a new caliper, that it would be fine.
I’m pretty sure my calipers are pulling in air. So I will plug that line and isolate that caliper. However, it’s the second new caliper.
And how long till that seal doesn’t seal. A month later it might decide to fail. So I’m at my last with this.
I’ve got few options. If I can’t buy new parts and solve these problems. What does that leave.
I’m going to take apart the caliper and inspect the rebuild.
See if I can test the caliper off the car with a vacuum pump or pressure bleeder and see if it drains down air.
Which I did for the whole system. I pumped it up with no fluid in the entire system. At 12psi it started leaking down air.
Then I bought a lot of fittings to cap the system and isolate to find out why. There is not a lot of pieces to do this. But I think I have enough.
I’m thinking I will find the caliper is not sealing. I’m pretty sure
Then what? If I can’t buy new parts and not have problems with them. What does that. Leave
I can entertain a couple of options.
……..Change out the whole rear end with one from a different care that has a drum in hat system
……..put drum brakes on it which I know won’t leak
……..put in non e brake calipers back there if I can find ones that bolt up
……..get a really expensive brand with a better design.
Like I said…….im at the end of trying to mess with this.
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