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F150 spongy pedal after front brake pads replaced.
02-12-2007, 11:32 PM
Post: #1
F150 spongy pedal after front brake pads replaced.
Hi - I replaced the front disk brake pad on my '92 F150. The rotors were good, no problems there. After doing the pads and bleeding the entire brake system (including the RABS valve) TWICE, I still have a spongy brake pedal. There are no obvious leaks in the hydraulic system and the M/C was replaced about 2 years ago...also, the pedal does harden up when pumping it up with engine off. What should I be looking for here? Thanks,
JSCB
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02-13-2007, 07:35 PM
Post: #2
RE: F150 spongy pedal after front brake pads replaced.
Sorry for the delay in the reply. Were the brakes operating normal before replacing the pads? Were the rotors turned? When you say spongy, does the pedal drop further down than before? When you bleed the brakes, was that to try and correct this problem? One thing that comes to mind is the master cyl. When doing brakes, when you are finished you pump the brakes up to force the piston in the caliper out till the pedal comes up. This is nessary, but long strokes can push the piston and seals in the master cyl. further than there normal travel it has worn into the past 2 years. And this can sometimes rip a seal in the master cyl.
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Cary Joe York
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02-13-2007, 11:45 PM
Post: #3
RE: F150 spongy pedal after front brake pads replaced.
Thank you for the reply...

The problem started after replacing the front pads. The pedal had been going lower to the floor than normal for the past couple of months but it did not have that spongy feel to it! The pads had over 50k and they were thin but not entirely done yet. The rotors were good ...they had been replaced with the pads about 50k freeway miles ago. I brushed them a little with 150 grit sandpaper, that's all.

I did pump the brakes slowly after pad installation to bring the caliper pistons back to the pads...no long strokes that i can recall.

Is there any way to test the M/C without pulling it out? The pedal gets hard when the brakes are pumped once or twice. The brakes seemed to have a "firmer grip" without as much pressure on the pedal before i replaced the pads....less pedal travel now than before the job.

Thanks for any input!
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02-15-2007, 12:15 AM
Post: #4
RE: F150 spongy pedal after front brake pads replaced.
Were the pads you installed low or high grade pads? I have had some low grade pads cause a spongy pedal when stopping. You may try changing the pads if they will warranty them were you bought them. If that does not do it, Put a master cyl. on it.

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Cary Joe York
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02-15-2007, 02:29 AM
Post: #5
RE: F150 spongy pedal after front brake pads replaced.
CaryJoeYork Wrote:Were the pads you installed low or high grade pads? I have had some low grade pads cause a spongy pedal when stopping. You may try changing the pads if they will warranty them were you bought them. If that does not do it, Put a master cyl. on it.

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Pads are Wagners...I've usually had good results with them. Oh well, I'll keep an eye on the pedal and the M/C too...thanks for your assist!

JSCB
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02-15-2007, 06:57 PM
Post: #6
RE: F150 spongy pedal after front brake pads replaced.
Sure

Cary Joe York
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02-22-2007, 10:54 PM
Post: #7
RE: F150 spongy pedal after front brake pads replaced.
Try making a couple of panic stps to engage the ABS. I have had a few that needed this brake apply to bring pedal up to normal.

Being way2old is why I need help from younger minds.

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02-22-2007, 11:40 PM
Post: #8
RE: F150 spongy pedal after front brake pads replaced.
Thanks for the input way2old. Sounds good. Keep up the postings. I like the wizard.

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Cary Joe York
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02-26-2007, 04:30 PM
Post: #9
RE: F150 spongy pedal after front brake pads replaced.
Hey , do you have disc or drum in the rear. If drum rear brakes, I've had to replace wheel cylinders because of a spongy feel due to leakage, did you check there.
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02-27-2007, 12:10 AM
Post: #10
RE: F150 spongy pedal after front brake pads replaced.
Let us know how it goes.

Cary Joe York
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