Page 1529 of 4378
72.
CAUTION: Do not stamp the top of pistons, as ring land damage can occur.
NOTE: Connecting rods and rod caps should be numbered to keep the correct orientation in the
following sequence.
Remove the connecting rod caps for pistons number 1 and 6.
zDiscard the bolts.
73. CAUTION: Do not scratch the cylinder walls or crankshaft journals with the
connecting rod.
NOTE: Before removing pistons, inspect the top of the cylinder bores. If necessary, remove the
ridge or carbon deposits from each cylinder using a cylinder ridge reamer. Follow
manufacturer's instructions.
Using the special tool, push pistons number 1 and 6 through the top of the cylinder block.
74. To remove pistons number 3 and 5, 4 and 7, 2 and 8, turn the crankshaft 90 degrees and repeat the previous two steps.
75. Remove the side bolts. Klj . 20 ba
232003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...
Page 1530 of 4378
76. Remove and discard the bolts.
77. Remove the main bearing caps and the crankshaft lower main bearings from the cylinder block. Klj . 21 ba
232003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...
Page 1531 of 4378
78. Remove the crankshaft, the crankshaft thrust washer, and the crankshaft upper main bearings
from the cylinder block. Klj . 22 ba
232003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...
Page 1532 of 4378
Klj . 23 ba
232003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...
Page 1533 of 4378
DISASSEMBLY AND ASSEMBLY OF SUBASSEMBLIES
Cylinder Head
Disassembly
1. CAUTION: Do not place the cylinder head (6049) flat on the bench; the valves will
bend. CAUTION: Before disassembly begins, mark the valve position on the face of each SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Compressor, Valve Spring
(Exhaust Side)
303-
567 (T97P-6565- AH) Compressor, Valve Spring
(Intake Side)
303-
452 (T93P-6565- AR) Holding Tool, Camshaft
303-
446 (T93P-6256- AHR) Air Operated Valve Spring
Holder
134-
R0207 or equivalent Installer, Valve Stem Oil Seal
303-
383 (T91P-6571- A)
Material Item Specification
Super Premium SAE 5W-20
Engine Oil
XO- 5W20- QSP or equivalent WSS-
M2C153-
H Klj . 1 ba
112003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...
Page 1534 of 4378
valve being removed. The valves must be re-
installed into the same positions.
Install the special tool.
2. Remove the exhaust camshaft sprocket and the intake camshaft bolt, washer and spacer.
3. Compress the tensioner (6L266) and install a lock pin.
4. Remove the special tool. Klj . 2 ba
112003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...
Page 1535 of 4378
5. Remove the timing chain (6268) and the camshaft sprocket (6256).
6.
NOTE: LH tensioner is shown, RH tensioner is similar.
Remove the tensioner.
7. Remove the roller followers on the base circle. 1. Install the special tool on the valve spring.
2. Compress the tool and remove the roller follower.
8. Repeat the previous step for the remaining roller followers.
9. Remove the hydraulic lash adjusters. Klj . 3 ba
112003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...
Page 1536 of 4378
10.
CAUTION: Make sure the tool is seated correctly on the valve spring. Apply a small
amount of air at a time. This will prevent the tool from shifting and causing damage to
the cylinder head.
Install the air- operated spring compressor on the cylinder head.
11. Compress the valve spring compressor and remove the key from the valves.
12. Remove the intake valves and the valve springs. 1. Release the pressure and remove the valve spring compressor. 2. Remove the intake valves and the valve springs from the cylinder head. Klj . 4 ba
112003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...