Ford Mustang (1999-2004) Service Manual: Piston Inspection

Special Tool(s)

Scraper, Piston Ring Groove 303-D033 (D81L-6002-D) or equivalent

CAUTION: Do not use a caustic cleaning solution or a wire brush to clean the pistons or damage can occur.

1. Clean and inspect the (1) ring lands, (2) skirts, (3) pin bosses, and the (4) tops of the pistons. If wear marks, scores or glazing is found on the piston skirt, check for a bent or twisted connecting rod.

Piston Inspection

2. Use the Piston Ring Groove Scraper to clean the piston ring grooves.

  • Make sure the oil ring holes are clean.

Piston Inspection

    Crankshaft - Connecting Rod Journal Taper, Out of Round
    1. Measure the crankshaft connecting rod journal diameters in two directions perpendicular to one another at each end of the connecting rod journal. The difference in the measurements from one e ...

    Piston - Pin to Bore Diameter
    1. WARNING: Cover the end of the pin bore with a hand or shop rag when removing the retainer ring, since it has a tendency to spring out. Wear eye protection. NOTE: Piston and piston pins are a matc ...

    Other materials:

    Disassembly
    1. Remove the No. 1 selective pump support thrust washer. 2. Remove the front pump support. 1. Remove the bolts. 2. Remove the front pump support. 3. Remove the seal rings. 4. Remove the inner and outer pump gerotor gears. 5. Carefully pry spring ...

    Final assembly
    23. Install the differential assembly in the differential housing. For additional information, refer to Differential Case in this section. 24. CAUTION: Align the index marks. CAUTION: Install the driveshaft with new bolts. If new bolts are not available, a ...

    Installation
    1. Install the bearing, snap ring, hub and dust shield. For additional information, refer to Wheel Hub-Cobra in this section. 2. Install the knuckle. 1. Position the knuckle on the lower suspension arm and bushing. 2. Install a new bolt and a new nut. Do ...