Author Topic: Bled new Wilwood brakes but still spongy pedal (Read 123744 times)

jimandemma · « **Reply #80 on:** March 17, 2018, 01:36:26 PM »

I don't think it's the proportional valve as I have fluid from all calipers and calipers are working

wabco40 · « **Reply #81 on:** March 17, 2018, 01:39:41 PM »

Sounds like that's all it can be then!!!

Did you bleed the master cylinder?

Another thing you can try is gently tapping the calipers with a rubber mallet when bleeding to dislodge any air.

jimandemma · « **Reply #82 on:** March 17, 2018, 01:40:03 PM »

Master Cylinder

jimandemma · « **Reply #83 on:** March 17, 2018, 01:41:09 PM »

Haven't bled the master on advice

bfit · « **Reply #84 on:** March 17, 2018, 04:24:11 PM »

Why not bleed the master cylinder

bfit · « **Reply #85 on:** March 17, 2018, 06:15:29 PM »

Did you fit wilwood front and rear calipers sets

jimandemma · « **Reply #86 on:** March 17, 2018, 07:02:47 PM »

I was told by the brake specialist that bleeding the master cylinder was only necessary if it has run dry, which it had not. Yes, front and rear caliper sets, discs, lines and pads, all Wilwood.

bfit · « **Reply #87 on:** March 17, 2018, 07:17:02 PM »

Well there is some truth, if the new calipers were fitted and lines connected at the same time as old calipers were removed .
The set up,you are fitting is gre same I have just taken of my car.
I had a hell of a job bleeding them , it was alway ain’t in my system , and when I did get a peddle it was 1’’ off the floor, hence I mensioned earlier I had to two tap the brakes every time .
I had no booster and 1’’ master .
What master do you have 1’’ or 1.125’’ (1 1/8’’ )
If you are still soft on the peddle bleed it again

jimandemma · « **Reply #88 on:** March 17, 2018, 07:18:56 PM »

They were fitted new for old straight away

bfit · « **Reply #89 on:** March 17, 2018, 07:33:28 PM »

Ok I would think the problem is in the rear calipers.
Remove the front mounting bolt on each rear caliper and lift it as far as you can .to get ther air to the bleeders. You may have to take both out to tilt enough to bleed. Make sure you keep caliper on rotor.
That’s how I bleed my rears to get a peddle.
You can stand the fronts up more as well if needed

jimandemma · « **Reply #90 on:** March 17, 2018, 08:27:38 PM »

Have already done that mate

bfit · « **Reply #91 on:** March 17, 2018, 08:35:09 PM »

Well rock and a hard place

bfit · « **Reply #92 on:** March 17, 2018, 08:38:19 PM »

Have you bleed from the fitting on the rear of the calipers 3/8’’ JIC fitting , I’m thinking to,isolate all,4 calipers with a male 3/8’’ Mic plug bleed each fitting and see if you have peddle.
If yes
Start engine and see if peddle is still good
Then connect one caliper at a time and see what you find

jimandemma · « **Reply #93 on:** March 17, 2018, 08:53:52 PM »

We clamped all 4 lines to the calipers and still soft pedal, so that has taken the calipers out of the equation. This was after bleeding vertical, top and bottom nipples. It has to be either the master or proportional valve. I'm taking the valve out of the equation as all calipers are working and bleeding solid fluid at the same rate, also no brake light activated on the dash. But, wouldn't be the first time I was wrong.

bfit · « **Reply #94 on:** March 17, 2018, 08:59:04 PM »

I’m running out of ideas,
my background training says start all over again, take it all apart inspect everything and assess everything.
Including the new parts

jimandemma · « **Reply #95 on:** March 17, 2018, 09:02:10 PM »

Ha, I've already given up mate. First time I've been stumped with a relatively simple hydraulic system. Just waiting on Wilwood for a recommended Master Cylinder. That's the next step in the saga.

bfit · « **Reply #96 on:** March 17, 2018, 09:09:11 PM »

I just fitted one of these wilwood 261-13270-P master cylinders
And two full days to get the air out of the system

jimandemma · « **Reply #97 on:** March 17, 2018, 09:18:34 PM »

At least with a new master, I can bench bleed then use the pressure bleeder for the rest of the system. 2 days ain't bad, I'm at 3 1/2 weeks and still going, lol.

bfit · « **Reply #98 on:** March 17, 2018, 09:24:31 PM »

I guess you have to try it.
The next question is what bore size to get

jimandemma · « **Reply #99 on:** March 17, 2018, 09:30:58 PM »

Going to go 1 1/8". Just waiting on advice from Wilwood.