APU CYLINDER HEAD -706881055

TM 5-4210-233-14&P-1

5-71. APU CYLINDER HEAD

This task covers:

a. Removal

c. Installation

b. Cleaning and

d. Follow-on Maintenance

Inspection/Repair

TOOLS REQUIRED

EQUIPMENT CONDITION

Tool Kit, General Mechanics, Automotive

APU Removed (see para 4-207.)

(Appendix B, Section III, Item 1)

APU Flywheel Removed (see para 5-67.)

APU Gear Cover Removed (see para 5-68.)

Shop Equipment, Automotive

APU Governor Cup Removed (see para 5-69.)

Maintenance and Repair

APU Camshaft Removed (see para 5-70.)

(Appendix B, Section III, Item 4)

APU Crankshaft Removed (see para 5-71.)

Valve Seat Insert Cutter (Appendix B, Section III, Item 90)

Decompression Solenoid Removed

(see para 5-73.)

MATERIALS/PARTS REQUIRED

Injector Nozzle Removed (see para 5-77.)

Oil, Lubricating (Item 10, Appendix E)

Marking Compound, (Item 56, Appendix E)

Dry Cleaning Solvent (Item 3, Appendix E)

a. Removal.

(1) Remove the fuel injector nozzle and then remove the intake and exhaust manifolds for access to

rocker arm cover (1).

(2) Remove the rocker arm cover (1) and gasket (2) by removing two screws (3) and washers (4).

(3) Remove two cap screws (5) and four cap screws (6) with four washers (7) holding the cylinder head (8)

to the cylinder block.

CAUTION

Do not use a pry to separate cylinder head from cylinder block. It

will damage cylinder head and/or cylinder block.

(4) Remove the cylinder head (8). If it sticks, rap it sharply with a soft hammer. Remove the cylinder head

gasket (8A).

(5) Remove rocker arms (9), push rods (10), seals (I 1), shields (12), springs (13), washers (14), seals (15),

tappets (16), balls (17) and nuts (18).

(6) Using a valve spring compressor, disassemble the valve assemblies which include valve stem cap

(19), valve spring retainer locks (20), spring retainer (21), spring (22), oil seal (23) (intake valve only)

valve guide (24), valve (25) and valve seat (26).

(7) Remove push rod guide (27).

(8) Disassemble the decompression release assembly by removing palnut (28), retaining ring (29),washer

(30), arm (31), spring (32) and pin (33).

5-384