Service manual

Important: When assembling the piston and

connecting rod, the mark on the top of the piston must

point to the front of the engine block. The left bank

connecting rods should have the ﬂange face toward

the front of the engine block. The right bank connecting

rods should have the ﬂange face toward the rear of

the engine block.

The new piston pin has an interference ﬁt into the

connecting rod and is full ﬂoating in the piston.

1. Install the new piston pin and connecting rod

assembly.

1.1. Lubricate the piston pin bores with clean

engine oil.

1.2. Use a torch and apply MILD heat to the

piston pin end of the connecting rod.

1.3. Use the

J 24086-C

in order to press the

new piston pin into the piston and

connecting rod assembly.

1.4. Inspect for the proper installation of the

piston and piston pin.

The piston must move freely on the new

piston pin with no binding or interference.

Notice:

SIO-ID = 16608 Use a piston ring expander to

install the piston rings. The rings may be damaged if

expanded more than necessary.

2. Install the piston rings onto the piston.

2.1. Install the oil control piston ring spacer.

2.2. Install the lower oil control piston ring.

2.3. Install the upper oil control piston ring.

2.4. Install the lower compression piston ring.

The mark on the side of the piston ring

should face the top of the piston.

2.5. Install the upper compression piston ring.

The mark on the side of the piston ring

should face the top of the piston.

490763

6-50 Engine Mechanical - 5.0L and 5.7L Engine

2002 - Unit Repair (May 25, 2001)