CAUTION: Do not oil threads that require oil resistant or water resistant sealer.

When installing nuts or bolts, oil the threads with light weight engine oil.

Refer to Section 03-00 for Cleaning and Inspection procedures.

Cylinder Head

Tools Required:

• Valve Spring Compressor T70P-6049-A
• Valve Stem Seal Replacer T87L-6571-BH

Disassembly

1. Remove the exhaust manifolds, if required, and the spark plugs.

2. Clean the carbon out of the cylinder head combustion chambers before removing the valves.

3. Compress the valve springs using Valve Spring Compressor T70P-6049-A. Remove the spring retainer locks and release the spring.

4. Remove the sleeve, spring retainer, spring, stem seal and valve. Discard the valve stem seals. Identify all valve parts as to which cylinder they were removed from and whether intake or exhaust.

5. Clean, inspect and service the cylinder head as required, or prepare to transfer all usable parts to a new cylinder head.
   
   
   
   

Assembly

All valves, valve stems and valve guides are to be lubricated with Engine Assembly Lubricant D9AZ-19579-D (ESR-M99C80-A) or equivalent. The valve tips are to have Multi-Purpose Grease D0AZ-19584-AA (ESR-M1C159-A and ESB-M1C93-A) or equivalent, applied before installation.

1. Install each valve in the port from which it was removed or to which it was fitted.

2. Install the valve stem seal. Use a 5/8 inch deep well socket and a light mallet or hammer to seat the seal on the guide. Use the instructions found in the Valve Stem Seal Replacer T87L-6571-BH. Install the valve spring over the valve and then install the spring retainer. Compress the spring and install the sleeve, if so equipped, and retainer locks.
   
   
   
   
   

   Item	Part Number	Description
   1	6518	Valve Spring Retainer Keys (32 Req'd)
   2	6A516	Exhaust Valve Rotator (8 Req'd)
   3	6513	Valve Spring (16 Req'd)
   4	6A517	Valve Stem Seal (16 Req'd)
   5	6505	Exhaust Valve (8 Req'd)
   6	6507	Intake Valve (8 Req'd)
   7	6514	Intake Valve Retainer (8 Req'd)
   8	6517	Intake Valve Sleeve (8 Req'd)

    CAUTION: Do not install the spacers unless necessary. Use of spacers in excess of recommendations will result in overstressing the valve springs and overloading the camshaft lobes which could lead to spring breakage and/or worn camshaft lobes.

3. Measure the assembled height of the valve spring from the surface of the cylinder head spring pad to the underside of the spring retainer with dividers. Check the dividers against a scale. If the assembled height is greater than specification, install the necessary 0.76mm (0.03 inch) thick spacer(s) between the cylinder head spring pad and the valve spring to bring the assembled height to the recommended height.

4. Install the exhaust manifolds and gaskets, if removed, and the spark plugs.