Ford Mustang (1999-2004) Service Manual: Valve Springs

Special Tool(s)

 Compressor, Valve Spring 303-163 (T81P-6513-A)

Material

Valve Springs

Removal

1. Remove the LH and the RH valve covers. For additional information, refer to Valve Cover-LH and Valve Cover RH in this section.

2. Rotate the crankshaft until the piston for the valve being worked on is at the top of its stroke with both the intake valve and the exhaust valve closed.

3. Hold the valve in the cylinder head.

  • Remove the spark plug. For additional information, refer to Section.
  • Apply a minimum of 965 kPa (140 psi) of compressed air into the cylinder.

4. CAUTION: If the components are to be reinstalled, they must be installed in the same position. Mark the components for location.

NOTE: If a valve drops into the cylinder, remove the cylinder head. For additional information, refer to Cylinder Head LH or Cylinder Head RH in this section.

Remove the rocker arms.

1. Remove the bolts.

2. Remove the rocker arms.

Valve Springs

5. Using the special tool, compress the valve springs.

Valve Springs

6. Remove the valve spring assembly.

1. Remove the valve spring retainer key.

2. Remove the valve spring retainer.

3. Remove the valve spring.

4. Remove and discard the valve stem seal and spring seat assembly.

Valve Springs

7. Inspect the components. For additional information, refer to Section.

Installation

1. NOTE: Lubricate the parts with clean engine oil.

To install, reverse the removal procedure. Tighten the rocker arm bolts in two stages.

  • Stage 1: Tighten to 5 Nm (44 lb-in).
  • Stage 2: Tighten to 35 Nm (26 lb-ft).

Valve Springs

    Push Rod
    Removal CAUTION: Mark the components removed for correct location. 1. Remove the rocker arms (6564). For additional information, refer to Rocker Arm in this section. 2. Remove the push rods (656 ...

    Valve Tappets
    Material Removal CAUTION: If removing more than one valve tappet, mark the components removed for correct location. 1. Remove the lower intake manifold. For additional information, refer to Lo ...

    Other materials:

    Safety Precautions
    WARNING: Never run the engine with one wheel off the ground, for example, when changing a tire. The wheel(s) resting on the ground could cause the vehicle to move. WARNING: The tire and wheel must always be correctly matched. It is very important to determ ...

    Installation
    LH mount 1. Position the engine mount and install the bolt and studbolts. 2. Attach the ground cables and install the nuts. RH mount 3. Position the engine mount and install the bolts and studbolt. 4. Attach the wiring harness and install the nut. Both ...

    Charge Air Cooler
    Material Item Specification Silicone Gasket and Sealant F7AZ-19554-EA or equivalent WSE-M4G323-EA Removal and Installation 1. Drain the supercharger coolant. For additional information, refer to Section. 2. Release the fuel pressure. F ...