Drivers side Brake caliper stuck shut? ABS engaged all the time. - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

gdrider77 · 09-18-2015, 08:35 PM

Quote:

Originally Posted by Dave-ROR

Have you checked to make sure that your hat to ring bolts are all tight?

I totally spaced that, but i will be pulling these all apart tonight, so will check that too.

gdrider77 · 09-18-2015, 08:37 PM

Here is a video with it.
Shot a few runs with the camera outside next to wheel, and also have it with the camera sitting underhood next to the ABS module.

strat61caster · 09-18-2015, 08:46 PM

Maybe the wheel speed sensor is borked? Damaged wire?

Wouldn't explain binding when the car is off but would explain the ABS kicking in...

gdrider77 · 09-18-2015, 09:23 PM

Quote:

Originally Posted by strat61caster

Maybe the wheel speed sensor is borked? Damaged wire?

Wouldn't explain binding when the car is off but would explain the ABS kicking in...

I thought about the speed sensors, but they are tied to the ABS correct. I am almost positive its not ABS. I just disconnected the ABS control completely. Sounds still happens. So while it sounds like an abs thing, i think its something more related to the brakes themselves.

I have all just got delivered, brake fluid, new pads, rotors, pistons, gaskets, mounts, etc. basically i ordered everythign but new rotor hats and calipers, but everything to rebuild the calipers. At this point, my next steps are in this order. If at anypoint the step does not resolve, move on to the next step.

Bleed system completely. Full flush. NO LUCK
check rotor runout, if this is in spec, then on to next step, if not, swap rotors. Willwood spec is .005 - .008 Pass.005, Drivers.004
If rotors are in spec, sand rotors lightly to remove any build up NO LUCK
Replace pads, possibly use more aggressive track pads to help with caliper smoothing, i have 2 new sets a bp10 (street) compound, and a polymatrix (track) compound. Wilwood actually recommends something like this. NO LUCK
Swap to stock rotors. calipers, lines. Put factory back on the drivers side, problem gone. Looks like its something with the wilwood setup on drivers side. Now to figure out if its the rotor, rotor hat or a caliper issue. Going to swap rotor first, then rebuild caliper, new pistons, then go from there.
New Rotor
caliper full rebuild

Think that makes sense

Dave-ROR · 09-19-2015, 12:55 AM

I think it's rattling before you even hit the brakes, but hard to really tell from the video. Check those bolts for sure!

gdrider77 · 09-19-2015, 05:30 PM

So far not making any progress, but at least eliminating a few things

Im now going to remove the entire BBK and put factory back on,

gdrider77 · 09-20-2015, 10:02 PM

Well. After a lot of time, and unfortunately around $700 in parts from wilwood I'm still no better off.

Still does it. I completely rebuilt the caliper, new orings, new pistons, new seals.

New brake pads, new rotors. Same old problem.

I'm stumped.

09-18-2015, 08:37 PM	#16
gdrider77 Senior Member Join Date: Oct 2012 Drives: Subaru BRZ Limited Location: Denver, CO Posts: 623 Thanks: 243 Thanked 263 Times in 157 Posts Mentioned: 19 Post(s) Tagged: 2 Thread(s)	Here is a video with it. Shot a few runs with the camera outside next to wheel, and also have it with the camera sitting underhood next to the ABS module. __________________

09-19-2015, 12:55 AM	#19
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	I think it's rattling before you even hit the brakes, but hard to really tell from the video. Check those bolts for sure! __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

09-19-2015, 05:30 PM	#20
gdrider77 Senior Member Join Date: Oct 2012 Drives: Subaru BRZ Limited Location: Denver, CO Posts: 623 Thanks: 243 Thanked 263 Times in 157 Posts Mentioned: 19 Post(s) Tagged: 2 Thread(s)	So far not making any progress, but at least eliminating a few things Im now going to remove the entire BBK and put factory back on, __________________

09-20-2015, 10:02 PM	#21
gdrider77 Senior Member Join Date: Oct 2012 Drives: Subaru BRZ Limited Location: Denver, CO Posts: 623 Thanks: 243 Thanked 263 Times in 157 Posts Mentioned: 19 Post(s) Tagged: 2 Thread(s)	Well. After a lot of time, and unfortunately around $700 in parts from wilwood I'm still no better off. Still does it. I completely rebuilt the caliper, new orings, new pistons, new seals. New brake pads, new rotors. Same old problem. I'm stumped. __________________

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