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

Special Tool(s)

Valve Spring Compressor 303-452 (T93P-6565-AR)
Valve Stem Seal Replacer 303-383 (T91P-6571-A)
Compressor, Valve Spring (Exhaust) 303-567 (T97P- 6565-AH)

Material

Item Specification
Super Premium SAE 5W-20 Motor Oil XO-5W20-QSP WSS-M2C153- H

Removal and Installation

1. Remove the roller followers. For additional information, refer to Camshaft Roller Follower in this section.

2. Remove the spark plug (12405) from the applicable cylinder.

3. Position the piston (6102) of the cylinder being serviced at the bottom of the stroke.

4. CAUTION: If air pressure has forced the piston to the bottom of the cylinder, any loss of air pressure will allow the valve to fall into the cylinder. If air pressure must be removed, support the valve prior to removal.

Use compressed air in the cylinder to hold both valves in position.

5. Using the special tool, compress the valve spring (6513).

Valve Seals

6. NOTE: Valve stem seals should be visually inspected if not installing new seals.

Remove the valve stem seals.

1. Remove the valve spring retainer keys.

2. Remove the valve spring retainers.

3. Remove the valve springs.

4. Remove the valve stem seals.

Valve Seals

7. NOTE: Lubricate the lip of the new seal with clean engine oil prior to installation.

To install, reverse the removal procedure.

    Installation
    1. CAUTION: The timing chain procedures must be followed exactly or damage to the valve and pistons will result. Compress the tensioner plunger, using an edge of a vise. 2. While holding the ratch ...

    Hydraulic Lash Adjuster
    Removal and Installation 1. Remove the roller followers. For additional information, refer to Camshaft Roller Follower in this section. 2. Remove the eight hydraulic lash adjusters. 3. Inspect the ...

    Other materials:

    Camshaft Lobe Lift
    Special Tool(s) Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent 1. Use a Dial Indicator Gauge with Holding Fixture to measure camshaft intake/exhaust lobe lift. Rotate the camshaft and subtract the lowest ...

    Child seat positioning
    WARNING: Airbags can kill or injure a child in a child seat. Never place a rear-facing child seat in front of an active airbag. If you must use a forward-facing child seat in the front seat, move the vehicle seat upon which the child seat is installed all th ...

    Anti-Theft - Passive Anti-Theft System (PATS) (Description and Operation)
    The passive anti-theft system (PATS) contains the following components: theft indicator encoded ignition key transceiver module instrument cluster powertrain control module (PCM) standard corporate protocol (SCP) communication network The PATS uses rad ...