2003 FORD MUSTANG engine

11.
NOTE: LH shown; RH similar.
Position the tensioner arms and tensioners, and install the bolts.
12. Remove the retaining clips from the timing chain tensioners.
13. Position the crankshaft sensor ring on the crankshaft.
14. Install the engine front cover. For additional information, refer to Engine Front Cover in this
section. Klj . 6 ba
72003 Mustang Workshop Manual
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IN-
VEHICLE REPAIR
Valve — Springs, Retainer and Valve Stem Seal
Removal 1. Remove the roller followers. For additional information, refer to Roller Followers in this section.
2. Remove the spark plugs. For additional information, refer to Section 303 - 07C .
3. Position the piston of the cylinder being serviced at the bottom of the stroke.
4. CAUTION: If air pressure has forced the piston to the bottom of the cylinder any
loss of air pressure will allow the valve to fall into the cylinder. If air pressure must be
removed support the valve prior to removal. Use compressed air in the cylinder to hold both valves in position. SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Compressor, Valve Spring
303-
452 (T93P-6565- AR) Installer, Valve Stem Oil Seal
303-
383 (T91P-6571- A) Compressor, Valve Spring
303-
567 (T97P-6565- AH) Spacer, Valve Spring
Compressor
303-
382 (T91P-6565- AH) Klj . 1 ba
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IN-
VEHICLE REPAIR
Hydraulic Lash Adjusters
Removal 1. Remove the roller followers. For additional information, refer to Roller Followers in this section.
2. Remove the 16 hydraulic lash adjusters.
3. Inspect the roller followers. For additional information, refer to Section 303 - 00 .
Installation
1. To install, reverse the removal procedure.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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IN-
VEHICLE REPAIR
Roller Followers
Removal and Installation 1. Remove the LH and RH valve cover. For additional information, refer to Valve Cover LH and
Valve Cover RH in this section.
2. Position the piston of the cylinder being repaired at the bottom of the stroke and camshaft lobe at base circle.
3. Using the special tool, compress the intake valve spring and remove the roller follower.
4. Using the special tool, compress the exhaust valve spring and remove the roller follower.
5. Repeat Steps 2, 3 and 4 to remove all the necessary roller followers. Inspect roller finger followers and camshafts. For additional information, refer to Section 303 - 00 .
6. To install, reverse the removal procedure.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Compressor, Valve Spring
303-
452 (T93P-6565- AR) Klj . 1 ba
22003 Mustang Workshop Manual
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IN-
VEHICLE REPAIR
Camshaft
Removal 1. Remove the roller followers. For additional information, refer to Roller Followers in this section.
2. Remove the LH timing chain for the LH side and both timing chains for the RH side. For additional information, refer to Timing Drive Components in this section.
3. Install the special tool.
4. Remove the exhaust camshaft sprocket and the intake camshaft bolt, washer and spacer.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Holding Tool, Camshaft
303-
446 (T93P-6256- AHR)
Material Item Specification
Super Premium SAE 5W-20
Engine Oil
XO- 5W20- QSP or equivalent WSS-
M2C153-
H Klj . 1 ba
72003 Mustang Workshop Manual
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9.
CAUTION: The outer bolts on the outer cam bearing cap (exhaust) are longer and
must be returned to the same location or engine damage may occur.
NOTE: Identify the camshaft to cylinder head location. Caps are not interchangeable.
Remove the bolts and the camshaft bearing cap assemblies.
10. Remove the camshafts. Klj . 3 ba
72003 Mustang Workshop Manual
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Installation
1. NOTE: LH shown; RH similar.
Install the camshafts. zLubricate the camshafts with clean engine oil.
2. Install the camshaft bearing cap assemblies and tighten the bolts in the sequence shown. Klj . 4 ba
72003 Mustang Workshop Manual
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IN-
VEHICLE REPAIR
Exhaust Manifold RH
Removal and Installation 1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Raise the vehicle. For additional information, refer to Section 100 - 02 .
3. Remove the dual converter Y- pipe. For additional information, refer to Section 309 - 00 .
4. Remove the starter. For additional information, refer to Section 303 - 06 .
5. Remove the exhaust manifold. 1. Remove the nuts.
2. Remove the exhaust manifold.
3. Remove and discard the gasket.
6. To install, reverse the removal procedure. zUse a new exhaust manifold gasket.
z Tighten the exhaust manifold nuts in the sequence shown.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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