2003 FORD MUSTANG Workshop Manual

Page 921 of 4378

FORD MUSTANG 2003  Workshop Manual GENERAL PROCEDURES 
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.  �zCheck

Page 922 of 4378

FORD MUSTANG 2003  Workshop Manual GENERAL PROCEDURES 
Valve —
Seat Width 
1. Measure the valve seat width. If necessary, grind the valve seat to specification.  �zMeasure the intake valve seat width. 
�z Measure the exhaust valve se

Page 923 of 4378

FORD MUSTANG 2003  Workshop Manual GENERAL PROCEDURES 
Valve —
Seat Runout 
1. Use the Valve Seat Runout Gauge to check valve seat runout. 
SECTION 303-
00: Engine System — General Information  2003 Mustang Workshop Manual  Klj

Page 924 of 4378

FORD MUSTANG 2003  Workshop Manual GENERAL PROCEDURES 
Cylinder Head —
Distortion 
1. Use a straight edge and a feeler gauge to inspect the cylinder head for flatness. If the cylinder  head is distorted, install a new cylinder head.

Page 925 of 4378

FORD MUSTANG 2003  Workshop Manual GENERAL PROCEDURES 
Cylinder Bore —
Cleaning 
1.  CAUTION: If these procedures are not followed, rusting of the cylinder bores may 
occur. 
Clean the cylinder bores with soap or detergent and water.

Page 926 of 4378

FORD MUSTANG 2003  Workshop Manual GENERAL PROCEDURES 
Cylinder Block Core Plug Replacement 
1. Use a slide hammer or tools suitable to remove the cylinder block core plug. 
2. Inspect the cylinder block plug bore for any damage that w

Page 927 of 4378

FORD MUSTANG 2003  Workshop Manual Expansion-
Type 
1.  CAUTION: Do not contact the crown when installing an expansion- type cylinder 
block core plug. This could expand the plug before seating and result in leakage. 
Use tool suitable

Page 928 of 4378

FORD MUSTANG 2003  Workshop Manual GENERAL PROCEDURES 
Spark Plug Hole Thread Repair 
1. There is no authorized repair for spark plug hole threads. If the threads are damaged, install a  new cylinder head. 
SECTION 303-
00: Engine Syst