Engine Mechanical - 3.5L: Overhaul Ford Flex I

Disassembly

All cylinder heads

Note. If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into their original locations.

1. Using the Valve Spring Compressors, remove the keys, retainer and spring.
2. Remove the valve from the cylinder head.
3. Remove and discard the valve stem seal.
4. Repeat the above steps for each valve. RH cylinder head
5. Remove and discard the Cylinder Head Temperature (CHT) sensor.

Scheme 128

Assembly

All cylinder heads

Scheme 129

1. NOTE: Lubricate the valve stem seal with clean engine oil prior to installation. Using the Valve Stem Oil Seal Installer, install a new valve stem seal.
2. Install the valve.
3. Using the Valve Spring Compressors, install the valve spring, retainer and key.
4. Repeat the above steps for each valve. RH cylinder head
5. Install a new CHT sensor.

1. Tighten to 10 Nm (89 lb-in).

1. Align the piston-to-connecting rod orientation marks and position the connecting rod in the piston.
2. Lubricate the piston pin and pin bore with clean engine oil.
3. Install the piston pin in the piston and connecting rod assembly.
4. Install the new piston pin retaining clips in the piston. The piston pin retaining clip gap orientation must be toward the top or dome of piston.
5. Lubricate the piston and the new piston rings with clean engine oil.
6. NOTE: The piston compression upper and lower ring should be installed with the "O" mark on the ring face pointing up toward the top of the piston. Install the piston rings onto the piston as shown in illustration. Center line of the piston parallel to the wrist pin bore Upper compression ring gap location Upper oil control segment ring gap location Lower oil control segment ring gap location Expander ring and lower compression ring gap location

Scheme 130