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:

    Output Shaft
    Special Tool(s) Puller, Bearing 205-D064 (D84L-1123-A) Adapter for 303-224 (Handle) 205-153 (T80T-4000-W) Installer, Output Shaft Rear Bearing 308-401 Remover/Installer, Bearing Tube 308-025 (T75L-7025 ...

    Parking Brake (Diagnosis and Testing)
    Inspection and Verification 1. Verify the customer's concern by operating the parking brake system to duplicate the condition. 2. Inspect to determine if one of the following mechanical or electrical concerns apply: Visual Inspection Chart Mechanica ...

    Installation
    1. NOTE: Inspect the spring insulators for wear or damage. Install new spring insulators if necessary. Make sure the spring insulators are correctly installed on the springs. 2. Install the springs. 1. Position the springs. 2. Raise the subframe using ...