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Re: front brakes-2001 Nissan Sentra
You will need a jack and 2 jack stands to get the front wheels off the ground (break the lug nuts loose before lifting) and support the vehicle.
You will need the lug nut wrench (or a 1/2 inch breaker bar and 21 MM socket) to remove the wheel.
You will need a 14 MM wrench to remove the caliper bolts and possibly a flat head screwdriver to pry the caliper off of the pads if it is difficult.
You will need a big pair of channel lock pliers to compress the piston back into the caliper bore to allow room for the new pads.
You may need a hammer to hit the rotors to break them loose if they are rusted into place on the hub- a couple good shots should break them free if needed.
You will also need a wire brush and some good brake grease (available at any parts store). You will want to see any place that the pads contact a stationary surface and clean this area and apply a film of the grease to these points to prevent binding and uneven pad wear.
Hope this is helpful!!
Nissan Scope Technician- 10+ years experience in Nissan dealership.
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Most common cause is the brake pads have worn and you have a metal to metal situation where there is no life left in the pads and they are scraping the rotors. Another cause could be a hung up caliper (you would notice the truck pull to one side or another when you apply the brakes if this is the case). One last possibility is worn out brake bearings that will grind when faulty. Either way, it sounds like you need a brake job that will include pads and rotors.
Sounds like it might be the low brake pad indicator. A small flap of metal which is made to scrape the rotor when the brake pads reach a certain low level. When brackes are applied the noise typically quiets.
Check for worn front brake pads.
The hard part is pressing the caliper piston abck into the caliper so you can get the new, thicker pads over the rotor. A large C Clamp works best.
SECTION 206-03: Front Disc Brake
2001 Villager Workshop Manual
REMOVAL AND INSTALLATION
Pads —Front Disc Brake
Remove the wheel and tire assembly. For additional information, refer to Section 204-04 .
Remove the front disc brake caliper bolts. torx bit. T20?
Support the front disc brake caliper from the front strut and spring assembly using mechanics wire.
Remove the front disc brake pads.
Remove the outboard front disc brake pad.
Remove the inboard front disc brake pad.
CAUTION: Make sure the master cylinder reservoir does not overfill and spill brake fluid while retracting the front disc brake caliper piston. NOTE: It is necessary to fully retract the front disc brake caliper piston in the bore before installing the front disc brake pads. Install the front disc brake pads.
Install the inboard front disc brake pad.
Install the outboard front disc brake pad.
Caution. The outer pads are left and right. put left on driver side.
Position the front disc brake caliper on the front-wheel knuckle and install the brake caliper pin bolts.
WARNING: It is necessary to depress the brake pedal several times to position the front disc brake caliper piston before driving the vehicle.