Ford Mustang (1999-2004) Service Manual: Piston - Selection
NOTE: The cylinder bore must be within the specifications for taper and out-of-round before fitting a piston.
1. Select a piston size based on the cylinder bore.

2. NOTE: For precision fit, new pistons are divided into three categories within each size range based on their relative position within the range. A paint spot on the new pistons indicates the position within the size range.
Choose the piston with the correct paint color.
- Refer to the appropriate section in Group for the procedure

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 ...
Piston - Ring End Gap
CAUTION: Use care when fitting piston rings to avoid possible damage to
the piston ring
or the cylinder bore.
CAUTION: Piston rings should not be transferred from one piston to another.
NOTE: Cylin ...
Other materials:
Bearing Whine
Bearing whine is a high-pitched sound similar to a whistle. It is usually
caused by worn/damaged
pinion bearings, which are operating at driveshaft speed. Bearing noise occurs
at all driving speeds.
This distinguishes it from gear whine which usually comes ...
Inspection and Verification
1. The keyless entry system is a generic electronic module (GEM).
2. Verify the customer concern by using the remote transmitters to
operate the keyless entry
system.
3. Visually inspect for the following obvious signs of mechanical and
electrica ...
Timing Drive Components
Special Tool(s)
Compressor, Valve Spring
303-567 (T97P-6565-AH)
Holding Tool, Crankshaft
303-448 (T93P-6303-A)
Aligner, Camshaft Position
303-557 (T96T-6256-B)
...
