Brake service instructions for 2002 Infiniti QX4

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It looks like your water pump on a 3.5L is run off the timing chain. I got some info which may help see it but may not be the exact as your car. If you are having some problems with overheating from what I saw looks like you have 2 thermostats and after changing thermostats, you can have air trapped in your engine, which will still allow engine to overheat.

Here's a YouTube video to reset the reminder on the Infiniti/Nissan.
Nissan Infiniti oil service reset

usually an O2 code is 3 digits and not this type of code. if it has an mass air flow sensor(MAF) it could be it. I would start with checking the MAF readings then the O2 readings. OBD 2 codes are emission regulated so no matter what car it is the codes represent the same problem.

I can't show you a picture of brake lining wear but I can explain what it is. Brake lining wear is your brake pad wear. If the instrument cluster is showing "brake lining wear' ' visit workshop' it means your brake pads have worn down and are now at the brake pad wear sensor.

Very easy! I owned several different year Windstars....very good van...

Changing the pads are very easy. Here is the instructions:

Removal & Installation

1. Remove the brake master cylinder reservoir cap. Siphon and recycle approximately half the fluid from the reservoir.
   
2. Raise and support the vehicle safely.
   
3. Remove the wheels.
   
4. Remove the disc brake caliper guide pins.
   

It is not necessary to disconnect the hydraulic lines.

1. Lift the disc brake caliper from the anchor plate.
   
2. Position the disc brake caliper out of the way by suspending with a wire.
   
3. Remove the brake pads from the anchor plate.
   

To install:

1. Inspect the rotor surfaces for scoring or buildup of lining material. Minor imperfections do not require machining. Hand sand the glaze from the rotor using 150 grit aluminum oxide sand paper.
   
2. Use a C-clamp and wooden block to seat the disc brake caliper hydraulic piston in its bore, as illustrated. This must be done to provide clearance for the disc brake caliper to fit over the front rotor during installation.
   
3. Remove all built-up rust from the inside of the brake caliper pad contact area.
   
4. Install the brake pads, with the clip on insulators, into the front brake caliper anchor plate.
   
5. Install the disc brake caliper onto the anchor plate.
   
6. Install the disc brake caliper guide pins and tighten to 23-38 ft. lbs. (31-38 Nm).
   

Failure to tighten the lug nuts to the proper torque in a star pattern may result in damage to the brake rotor.

1. Install the wheel and tighten lug nuts to 83-112 ft. lbs. (113-153 Nm).
   
2. Lower the vehicle.
   
3. Pump the brake pedal to seat the brake pads.
   

• Brake linings that are worn to within 1/32 inch (0.79 mm) of a rivet head or that have been contaminated with brake fluid, grease, or oil must be replaced.

Potential brake shoe problems. Courtesy of Wagner Brake Products.

• Failure to replace worn linings results in a scored drum. When it is necessary to replace brake shoes, they must also be replaced on the wheel on the opposite side of the vehicle. Inspect brake shoes for distortion, cracks, or looseness. If these conditions exist, the shoe must be discarded.
• Do not let brake fluid, oil, or grease touch the brake lining.
• If a brake lining kit is used to replace the linings, follow the instructions in the kit and install all the parts provided.
• The two general methods of attaching the linings to the brake shoes are bonding and riveting.
• The bonded linings are fastened with a special adhesive to the shoe, clamped in place, then cured in an oven. Instead of using an adhesive, some linings are riveted to the shoe.
• Riveted linings allow for better heat transfer than bonded linings.

Drum Shoe and Brake Installation

• Before installing the shoes, be sure to sand or stone the inner edge of the shoe to dress down any slight lining or metal nicks and burrs that could interfere with the sliding upon the support pads.
• A support (backing) plate must be tight on its mount and not bent. Stone the shoe support pads brightly and dress down any burrs or grooves that could cause the shoes to bind or hang up.
• Using an approved lubricant, lightly coat the support pads and the threads of servo star wheel adjusters. On rear axle parking brakes, lubricate any point of potential binding in the linkage and the cable. Do not lubricate nonservo brake adjusters other than to free a frozen adjuster with penetrating oil.

The areas or pads where the brake show will rub or contact the backing plate.

• Reassemble the brakes in the reverse order of disassembly. Make sure all parts are in their proper locations and that both brake shoes are properly positioned in either end of the adjuster.
• Also, both brake shoes should correctly engage the wheel cylinder pushrods and parking brake links.
• They should be centered on the backing plate. Parking brake links and levers should be in place on the rear brakes.
• With all of the parts in place, replace the brake drum.

you need to have new pads and rotors installed,the rotors is where your vibration is coming from

its the brake pad wear indicator telling you your pads are in need of replacing

i'm not to privey on this make ,but some of these models have a reset switch .you might want to check your owners manual to see if that is so .if so it should tell you how to reset it .hope this help's

The squeal is usually the tell tales that make a noise when the front or rear disk pads are worn to where they need replacing. However, with drum brakes, that is an indication of totally worn out shoes, or a broken part. STOP driving the car, go to a mechanic (or friend) and have them checked.