Ford Mustang (1999-2004) Service Manual: Valve - Seat Inspection

Valve and Seat Refacing Measurements

CAUTION: After grinding valves or valve seats, check valve clearance.

1. Check the valve head and seat.

  • Check valve angles.
  • Check margin width.
  • Refer to the appropriate section in Group 303 for the procedure.
  • Be sure margin width is within specification.

Valve -Seat Inspection

2. Inspect for abnormalities on the valve face and seat.

Valve -Seat Width

1. Measure the valve seat width. If necessary, grind the valve seat to specification.

  • Measure the intake valve seat width.
  • Measure the exhaust valve seat width.
  • Recheck the valve spring installed length after the seats have been ground, and shim the valve springs as necessary to achieve the correct installed spring length.
  • Refer to the appropriate section in Group 303 for the procedure.

Valve -Seat Inspection

Valve -Seat Runout

1. Use the Valve Seat Runout Gauge to check valve seat runout.

Valve -Seat Inspection

    Valve Spring Strength
    Special Tool(s) Pressure Gauge, Valve/Clutch Spring 303-006 (TOOL-6513-DD) or equivalent 1. Use a Valve/Clutch Spring Pressure Gauge to check the valve spring for correct strength ...

    Cylinder Head - Distortion
    Special Tool(s) Straight Edge 303-D039 (D83L-4201-A) or equivalent 1. Use a straight edge and a feeler gauge to inspect the cylinder head for flatness. If the cylinder head is disto ...

    Other materials:

    Stoplamps
    Refer to Wiring Diagrams Cell 90 , Turn/Stop/Hazard Lamps for schematic and connector information. Special Tool(s) 73III Automotive Meter or equivalent 105-R0057 Inspection and Verification 1. Verify the customer concerns. 2. Visually ...

    Fuel Charging and Controls
    The fuel injection supply manifold (9F792): delivers fuel to the fuel injector. receives fuel from the fuel supply line. The throttle body: controls air supply to the upper intake manifold by positioning the throttle plate. connects the accelerator ca ...

    Principles of Operation
    NOTE: Battery power and ground must be remove before disconnecting the GEM connectors to avoid setting false codes. Power Locks Operation The power locks feature allows the customer to lock and unlock the doors via momentary switches located on t ...