Couple of years ago I did a Hydroboost swap concurrant with installing a 9.5" SF rearend with disc brakes on my 1997 K1500 Suburban.
I used an axle from a 97 K1500 Z71 pickup. The Hydroboost was harvested from a 2002 Z71 Suburban as were the dual piston rear brakes and 13 in rotors.
Two weeks ago I jumped into the truck and headed out and my pedal goes to the floor. I assumed my front pads were shot, parked it and and finally got around to looking at it.
To my suprise all the pads had plenty of material. I was slightly low on fluid so I hooked up the pressure bleeder and looked for a leak. Could not find a leak anywhere. Tried to bleed brakes, starting at the rear, opened bleed screws, no fluid either side. Goto front plenty of fluid coming from both. Still no pedal.
A mechanic friend suggested a leak between the master cylinder and the hydro boost. Pulled master cylinder. No leak I could detect. He also speculated that the rear discs may have never worked since the Kelsy ABS was not proportioned for them. Hard braking in the truck did seem biased to the front.
Wondering if the ABS is culprit?
Anyone done a Hydroboost swap on a 97 with rear discs?
What did you do for proportioning?
I'm going to put on another master cylinder and see if that is it, could be. But I will still have the proportioning issue.
Is an ABS delete a viable option?
Could use some advise.
Thank you in advance.
Dave
I used an axle from a 97 K1500 Z71 pickup. The Hydroboost was harvested from a 2002 Z71 Suburban as were the dual piston rear brakes and 13 in rotors.
Two weeks ago I jumped into the truck and headed out and my pedal goes to the floor. I assumed my front pads were shot, parked it and and finally got around to looking at it.
To my suprise all the pads had plenty of material. I was slightly low on fluid so I hooked up the pressure bleeder and looked for a leak. Could not find a leak anywhere. Tried to bleed brakes, starting at the rear, opened bleed screws, no fluid either side. Goto front plenty of fluid coming from both. Still no pedal.
A mechanic friend suggested a leak between the master cylinder and the hydro boost. Pulled master cylinder. No leak I could detect. He also speculated that the rear discs may have never worked since the Kelsy ABS was not proportioned for them. Hard braking in the truck did seem biased to the front.
Wondering if the ABS is culprit?
Anyone done a Hydroboost swap on a 97 with rear discs?
What did you do for proportioning?
I'm going to put on another master cylinder and see if that is it, could be. But I will still have the proportioning issue.
Is an ABS delete a viable option?
Could use some advise.
Thank you in advance.
Dave