AC system FORD MUSTANG 2003 Workshop Manual

GENERAL PROCEDURES
Valve —
Guide Inner Diameter
1. Measure the inner diameter of the valve guides in two directions where indicated. zRefer to the appropriate section in Group 303 for the procedure.
2. If the valve guide is not within specifications, ream the valve guide and install a valve with an oversize stem or remove the valve guide and install a new valve guide.
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12003 Mustang Workshop Manual
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GENERAL PROCEDURES
Valve —
Guide Reaming
1. Use a hand- reaming kit to ream the valve guide.
2. Reface the valve seat.
3. Clean the sharp edges left by reaming.
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12003 Mustang Workshop Manual
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GENERAL PROCEDURES
Valve —
Spring Installed Length
1. Measure the installed length of each valve spring. zRefer to the appropriate section in Group 303 for the procedure.
z If out of specification, install new components. Refer to the appropriate section in Group
303 for the procedure.
SECTION 303-
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12003 Mustang Workshop Manual
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GENERAL PROCEDURES
Valve —
Spring Free Length
1. Measure the free length of each valve spring. zRefer to the appropriate section in Group 303 for the procedure.
z If out of specification, install new components as necessary. Refer to the appropriate
section in Group 303 for the procedure.
SECTION 303-
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12003 Mustang Workshop Manual
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GENERAL PROCEDURES
Valve —
Spring Squareness
1. Measure the out-of- square on each valve spring.
z Turn the valve spring and observe the space between the top of the valve spring and the
square. Install a new valve spring if out of square. Refer to the appropriate section in
Group 303 for the procedure.
SECTION 303-
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12003 Mustang Workshop Manual
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GENERAL PROCEDURES
Valve Spring Strength
1. Use a Valve/Clutch Spring Pressure Gauge to check the valve spring for correct strength at the specified valve spring length.
zRefer to the appropriate section in Group 303 for the procedure.
z If out of specification, install new components as necessary. Refer to the appropriate
section in Group 303 for the procedure.
SECTION 303-
00: Engine System — General Information 2003 Mustang Workshop Manual Special Tool(s)
Pressure Gauge, Valve/Clutch
Spring
303-
006 (TOOL- 6513-DD) or
equivalent Klj . 1 ba
22003 Mustang Workshop Manual
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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 valve angles.
z Check margin width.
z Refer to the appropriate section in Group 303 for the procedure.
z Be sure margin width is within specification.
2. Inspect for abnormalities on the valve face and seat.
SECTION 303-
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12003 Mustang Workshop Manual
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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 seat width.
z 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.
z Refer to the appropriate section in Group 303 for the procedure.
SECTION 303-
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12003 Mustang Workshop Manual
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GENERAL PROCEDURES
Valve —
Seat Runout
1. Use the Valve Seat Runout Gauge to check valve seat runout.
SECTION 303-
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12003 Mustang Workshop Manual
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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.
SECTION 303-
00: Engine System — General Information 2003 Mustang Workshop Manual Special Tool(s)
Straight Edge
303-
D039 (D83L-4201- A) or
equivalent Klj . 1 ba
12003 Mustang Workshop Manual
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