All Front Brake Pads and Rotors jobs
Front Brake Pads and Rotors
2013–2014 Subaru Outback - 2.5L H4 / FB25
Front brake pads and rotors on a 2013–2014 Outback 2.5i. This is a driveway job if your rust belt hasn't permanently welded the rotor to the hub. Plan 1–2 hours, and don't skip the wire brush on the hub face—you'll regret it.
How Rough Is This Going to Be? Know what you're getting into.
You're pulling wheels, hanging the caliper from the strut (never let it dangle by the hose), removing the bracket, cleaning rust off the hub, pressing back dual pistons, and reinstalling everything to specific torques. The 2013–2014 Outback uses 294 mm rotors and a 2-piston floating caliper over factory abutment clips. Not hard, but sloppy work here shows up as brake pulsation and drag inside 1,000 miles.
Save Another Trip to the Parts Store Clips, seals, fluids, and the little stuff people forget.
Pump the brake pedal 4–5 times before you drive. The pistons are retracted; the pads are nowhere near the rotor until you pump them out. Moving the truck with zero initial brake pressure is how people panic-test their bumper. Also: check and drain the master cylinder reservoir before you start—brake fluid overflows fast when you're compressing pistons.
Here's Where It Gets Greasy The procedure, pain points, and common ways this job fights back.
Mix up the lower and upper caliper pins—the lower one (Lock Pin) has a rubber sleeve and must go in the lower hole. Use petroleum grease on it and you'll swell the bushing into a solid lock within 1,000 miles. Don't over-torque the 14 mm slide pin bolts; they're hollow and snap easily past 27 N·m. Skip wire-brushing the hub face or the abutment channels and you'll fight brake noise and pulsation for the life of the pads. Let the caliper hang by the brake hose and you'll damage the internal line.
Procedure
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1
Brake Master Cylinder Reservoir
Park the vehicle on a level, hard surface. Place wheel chocks behind the rear tires. Open the hood and verify the brake fluid level in the master cylinder reservoir; remove excess fluid with a suction syringe if near the MAX line to prevent overflow during piston retraction.
Brake fluid damages automotive paint immediately. Wipe any spills instantly and flush with water.
Leave the master cylinder cap resting loosely over the opening to keep debris out while allowing air displacement.
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2
Front Wheel Lug Nuts
Loosen the 19mm wheel lug nuts slightly (1/2 turn) while the front wheels are resting on the ground.
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3
Vehicle Front Chassis / Wheels
Raise the front of the vehicle using a hydraulic floor jack positioned under the central front crossmember jack plate. Position jack stands securely under both front pinch welds or frame support points and carefully lower the vehicle onto the stands. Remove the 19mm lug nuts and wheels.
Never work under or around a vehicle supported solely by a hydraulic floor jack.
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4
Caliper Slide Pin Bolts (14mm)
Using a 14mm socket or wrench, remove both the upper and lower caliper slide pin bolts securing the caliper body to the guide and lock pins.
If the slide pin spins while loosening the 14mm bolt, hold the flats of the slide pin collar with a slim open-end wrench.
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5
Front Brake Caliper Body
Slide the caliper body off the pads and bracket. Suspend the caliper body directly from the front strut coil spring using a heavy-duty brake caliper hanger / S-hook.
Do not let the caliper dangle by the flexible rubber brake hose, as this strains the inner hydraulic liner and can cause hose rupture or failure.
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6
Front Brake Pads and Shims
Remove the inner and outer brake pads and stainless steel shims from the caliper support bracket. Note the position of the wear indicator clip (typically on the inner pad).
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7
Caliper Support Bracket Bolts (17mm)
Using a 17mm socket and breaker bar, loosen and remove the two bolts securing the caliper support bracket to the steering knuckle. Remove the caliper support bracket.
These fasteners are torqued from the factory to 120 N·m (88.5 ft-lb) and may require a breaker bar or long ratchet.
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8
Front Brake Rotor
Remove the front brake rotor from the wheel hub. If the rotor is seized onto the hub face by rust, thread two M8 x 1.25 metric bolts evenly into the threaded extraction holes on the rotor hat until the rotor pops free.
Avoid violently hammering the rotor face with a sledgehammer, as the shock load can damage the front wheel hub bearings and wheel studs.
Apply penetrating oil around the center hub flange prior to threading in the M8 jacking screws.
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9
Wheel Hub Flange
Clean the wheel hub mounting flange thoroughly with a wire brush or abrasive wheel to remove all rust scale and debris. Ensure the hub mating surface is completely flat and smooth. Wipe clean with brake cleaner.
Even 0.05 mm of rust scale trapped behind the new rotor will cause lateral runout and brake pedal pulsation within several thousand miles.
Apply a micro-thin film of anti-seize paste to the hub mating face, avoiding the wheel studs.
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10
New Front Brake Rotor
Clean the protective shipping oil off the new brake rotor friction surfaces and hat using aerosol brake cleaner and clean lint-free towels. Install the new rotor onto the clean wheel hub. Thread one lug nut hand-tight against a washer to hold the rotor flush against the hub during remaining assembly.
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11
Caliper Slide Pins and Rubber Boots
Service the caliper support bracket: remove both slide pins (track upper vs lower). Clean old grease from the pins and internal bracket bores. Inspect the rubber dust boots and the lower lock pin rubber sleeve (replace if swollen or torn). Apply NIGLUBE RX-2 or rubber-safe silicone brake paste to the slide pins and boots. Reinstall the solid pin in the upper hole (Guide Pin) and the sleeved pin in the lower hole (Lock Pin).
Do NOT use petroleum-based grease (e.g., standard wheel bearing grease or anti-seize) on slide pins; petroleum swells the lower rubber lock pin bushing, locking the caliper and destroying pads prematurely. Ensure the lower sleeved lock pin is inserted in the LOWER caliper bracket hole, not the upper.
Ensure the slide pins glide smoothly without airlock hydraulic lockup inside the bore.
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12
Caliper Bracket Pad Abutment Channels / Clips
Remove old abutment clips from the bracket. Wire-brush the abutment channels on the bracket casting to clean out all rust buildup under the clips. Install brand-new stainless steel abutment clips onto the bracket.
Rust scale expanding under abutment clips pinches pad ears, leading to stuck pads, rapid pad taper, and brake drag.
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13
Caliper Support Bracket Mounting Bolts (17mm)
Mount the caliper support bracket onto the steering knuckle. Install the two 17mm mounting bolts and torque both bolts to 120 N·m (88.5 ft-lb) using a torque wrench.
Ensure bolts reach full factory torque of 120 N·m (88.5 ft-lb). Loose bracket bolts can back out and cause catastrophic brake failure.
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14
New Front Brake Pads and Shims
Apply a thin film of high-temperature brake lubricant (Molykote AS-880N / M-7439 equivalent) to the contact surfaces of the pad backing plates, shims, and pad ear slide contact points on the abutment clips. Install the inner and outer brake pads into the caliper bracket clips. Verify the inner pad wear indicator is correctly positioned.
Never allow lubricant to touch the pad friction material or rotor friction faces.
The pads should slide freely by hand in the stainless abutment clips without binding.
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15
Caliper Dual Pistons
Place an old brake pad across the dual pistons on the caliper body. Use a caliper piston compressor tool or heavy C-clamp to slowly and evenly press both pistons fully back into the caliper bores until flush.
Observe the master cylinder reservoir level while pressing pistons to avoid fluid overflow.
Pressing slowly prevents internal pressure spikes in the ABS hydraulic control unit.
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16
Caliper Body Slide Pin Bolts (14mm)
Position the caliper body over the new brake pads and slide pins. Install the two 14mm guide/lock pin bolts. Torque both 14mm bolts to 27 N·m (19.9 ft-lb / 20 ft-lb) using a torque wrench.
Do not over-torque the 14mm slide pin bolts into the hollow guide pins; overtightening can strip the pin threads or snap the bolt.
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17
Front Wheel & Lug Nuts
Remove the temporary holding lug nut from the rotor. Reinstall the wheel and hand-thread all 19mm lug nuts. Snug the lug nuts evenly in a star pattern while the wheel is in the air.
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18
Wheel Lug Nuts (19mm)
Raise the vehicle slightly, remove the jack stands, and lower the vehicle onto the ground. Torque the 19mm wheel lug nuts in a criss-cross star pattern to 120 N·m (88.5 ft-lb).
Uneven or improper wheel lug nut torque will warp brake rotors and cause brake pulsation.
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19
Opposite Front Brake Assembly
Repeat the entire procedure for the opposite front wheel assembly.
Always replace brake pads and rotors in complete axle pairs.
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20
Brake Pedal & Hydraulic System
Before starting the engine or shifting out of Park, firmly pump the brake pedal 4 to 5 times until the pedal feels firm and high. Check and adjust the final brake fluid level in the master cylinder reservoir to the MAX mark and tighten the cap securely. Perform a test drive with low-speed burnishing/bedding stops.
CRITICAL: Do NOT drive the vehicle without pumping the brake pedal first. The pistons are retracted and the vehicle will have ZERO initial stopping ability until the pads are pumped out against the rotors.
Bed in new pads with 5-10 moderate decelerations from 45 mph down to 15 mph without coming to a complete stop.
Gotchas
- Lower vs. Upper Caliper Slide Pin Mix-Up: Subaru calipers use two distinct slide pins on the front brakes. The lower pin is the Lock Pin (silver) and has a rubber bushing/sleeve around its tip. The upper pin is the Guide Pin (gold/dark) and is solid metal. Reversing their positions causes brake noise, slide pin binding, and uneven pad taper.
- Petroleum Grease Swelling Rubber Bushings: Using standard petroleum chassis grease or anti-seize on the lower slide pin will cause the rubber sleeve/bushing to swell significantly. Once swollen, the slide pin seizes solidly inside the bracket bore, leading to severe inner pad wear and rotor overheating within 1,000 miles. Use only dedicated silicone brake grease or OEM NIGLUBE RX-2.
- Caliper Bracket Torque Specification Difference: Earlier generation Subarus used 80 N·m (59 ft-lb) for front caliper bracket bolts, but the 2010–2014 Outback (4th gen) specifies 120 N·m (88.5 ft-lb). Torquing to earlier specs can result in caliper bracket bolts loosening over time.
- Rotor Seized to Wheel Hub: Due to galvanic corrosion between the steel hub face and cast iron rotor hat, the rotor frequently seizes to the hub. Do not pound violently on the rotor with a steel hammer, which damages the wheel bearing. Instead, thread two M8x1.25 bolts into the threaded extractor holes on the rotor face to push it off smoothly.
- Failure to Pump Brake Pedal Before Moving: Compressing the twin pistons leaves a wide gap between pad friction material and rotor face. Moving the vehicle before pumping the pedal will result in zero initial braking power.
Common mistakes
- Failing to clean rust scale from the wheel hub face before mounting the new rotor, resulting in lateral runout, brake judder, and steering wheel shake under braking.
- Neglecting to clean rust build-up from under the stainless steel pad abutment clips in the bracket casting, causing the new pads to bind tightly in the bracket channels.
- Letting the heavy two-piston caliper hang unsupported by the rubber brake hose while changing pads and rotors, damaging the internal liner of the brake hose.
- Over-tightening the 14mm slide pin bolts beyond the 27 N·m (19.9 ft-lb) specification, causing the bolt to stretch or snap inside the slide pin.
- Ordering 316 mm rotors intended for the 3.6R H6 model rather than the 294 mm rotors required for the 2.5i FB25 model.
It's a Good Idea To... Greasy tips and useful while-you're-in-there advice.
If the rotor is welded to the hub by rust, thread two M8×1.25 bolts into the rotor's extraction holes and turn them evenly. You'll feel it pop free. Hammering the rotor with a sledge risks destroying the wheel bearing. Soak the hub face with penetrating oil first if it's been sitting.
You Already Have a Screw Loose. Your Car Shouldn't. Final checks before you call it done.
Stay organized: label which pin goes where, torque everything (17 mm bracket bolts to 120 N·m, 14 mm slide pins to 27 N·m, wheel lugs to 120 N·m in a star pattern), use silicone brake grease only, and bed the pads gently on your first 10 miles. Clean hub, new clips, fresh pads, and firm pedal—you're done.