engine FORD MUSTANG 2003 Workshop Manual

GENERAL PROCEDURES
Sprockets
1. WARNING: To avoid the possibility of personal injury or damage to the vehicle, do
not operate the engine with the hood open until the fan blade has been examined for
possible cracks and separation.
NOTE: Specifications show the expected minimum or maximum condition. Refer to the
appropriate section in Group 303 for the procedure.
NOTE: If a component fails to meet the specifications, it is necessary to install a new
component or refinish. If the component can be refinished, wear limits are provided as an aid to
making a decision. A new component must be installed for any component that fails to meet
specifications and cannot be refinished.
Inspect the timing chain/belt and the sprockets.
zInstall new components as necessary. Refer to the appropriate section in Group 303 for
the procedure.
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GENERAL PROCEDURES
Rocker Arms —
Cleaning
1. Clean all parts thoroughly. Make sure all oil passages are open.
2. Make sure oil passage in the push rod/valve tappet end of the rocker arm (6564) is open.
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GENERAL PROCEDURES
Rocker Arms —
Inspection
CAUTION: Do not attempt to true surfaces by grinding. Check the rocker arm pad, side
rails and seat for excessive wear, cracks, nicks or burrs. Check the rocker arm seat bolt for
stripped or broken threads. Install new components as ncessary or possible damage may
occur.
1. Inspect the rocker arm push rod bore for nicks, scratches, scores or scuffs. Install new components as necessary. Refer to the appropriate section in Group 303 for the procedure.
2. Inspect the pad at the valve end of the rocker arm for indications of scuffing or abnormal wear. If the pad is grooved, install a new rocker arm. Refer to the appropriate section in Group 303 for
the procedure.
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GENERAL PROCEDURES
Push Rods —
Cleaning
1. Clean the push rods (6565) in a suitable solvent. Blow out the oil passage in the push rods with compressed air.
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GENERAL PROCEDURES
Push Rods —
Inspection
1. CAUTION: Do not attempt to straighten push rods.
Check the ends of the push rods for nicks, grooves, roughness or excessive wear. Install new
push rods as necessary. Refer to the appropriate section in Group 303 for the procedure.
z The push rods can be checked for straightness while they are installed in the engine by
rotating them with the valve closed.
z They also can be checked using a Dial Indicator with Bracketry.
2. If the push rod is bent beyond specifications, install a new push rod. Refer to the appropriate section in Group 303 for the procedure.
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GENERAL PROCEDURES
Camshaft Journal —
Diameter
1. Measure each camshaft journal diameter in two directions. zIf out of specification, install new components as necessary. Refer to the appropriate
section in Group 303 for the procedure.
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GENERAL PROCEDURES
Camshaft Journal —
Clearance, Push Rod Engines,
Micrometer Method
1. NOTE: The camshaft journals must meet specifications before checking camshaft journal
clearance.
Measure each camshaft bearing (6261) in two directions.
zSubtract the camshaft journal diameter from the camshaft bearing diameter.
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GENERAL PROCEDURES
Camshaft Journal —
Clearance, Plastigage Method
NOTE: The camshaft journals must meet specifications before checking camshaft journal clearance.
1. Remove the camshaft bearing cap and lay Plastigage across the surface. Refer to the appropriate section in Group 303 for the procedure.
2. NOTE: Do not turn the camshaft while carrying out this procedure.
Position the camshaft bearing cap and install the bolts. Refer to the appropriate section in
Group 303 for the procedure.
3. Use Plastigage to verify the camshaft journal clearance. zIf 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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Plastigage
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GENERAL PROCEDURES
Camshaft End Play —
Push Rod Engines
1. Remove the valve tappets. Refer to the appropriate section in Group 303 for the procedure.
2. Use a Dial Indicator Gauge with Holding Fixture to measure camshaft end play.
3. Position the camshaft to the rear of the cylinder block.
4. Zero the indicator.
5. Move the camshaft to the front of the cylinder block. Note and record the camshaft end play. zIf the camshaft end play exceeds specifications, install a new camshaft thrust plate.
Refer to the appropriate section in Group 303 for the procedure.
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Dial Indicator Gauge with
Holding Fixture
100-
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equivalent Klj . 1 ba
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GENERAL PROCEDURES
Camshaft End Play —
OHC Engines
1. Remove the roller followers. Refer to the appropriate section in Group 303 for the procedure.
2. Use a Dial Indicator Gauge with Holding Fixture to measure camshaft end play.
3. Position the camshaft to the rear of the cylinder head.
4. Zero the indicator.
5. Move the camshaft to the front of the cylinder head. Note and record the camshaft end play. zIf camshaft end play exceeds specifications, install new camshaft and recheck end play.
Refer to the appropriate section in Group 303 for the procedure.
z If camshaft end play exceeds specification after camshaft installation, install a new
cylinder head. Refer to the appropriate section in Group 303 for the procedure.
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Dial Indicator Gauge with
Holding Fixture
100-
002 (TOOL- 4201-C) or
equivalent Klj . 1 ba
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