Chapter 3. REPAIR OF ENGINE

CHAPTER 3

REPAIR OF ENGINE

"overhaul"of the engine. All information required to put

3-1. Description

the engine back in good operating condition is given

here. Refer to the troubleshooting chart table 2-2 to

The engine is a Continental FS162 engine. This is a

decide what repairs are needed. If any repairs needed

four-cylinder L-head, water-cooled industrial unit. Since

are beyond locally available facilities or skills, refer the

this basic engine is used in many applications by the

job to depot maintenance. In all cases observe the table

army, direct and general support maintenance facilities

of torque values to insure successful repairs.

can be expected to be somewhat familiar with it.

3-4. Cylinder Head Removal, Cleaning, Inspection

3-2. General

and Installation

The following instructions cover repair of the engine

Refer to TM 10-3930-627-12.

through overhaul, and checks and measurements to

decide if rebuild at depot level is necessary. This

chapter does not give rebuilding instructions. Refer the

3-5. Valves and Related Components

engine to depot facilities for work beyond the general

support capabilities. Minor repairs can be made with the

a. Removal.

engine in the truck; however, if major work is expected,

(1) Remove cylinder head, manifolds, and valve

remove the engine (para 2-6), and mount it on an

chamber cover, refer to TM 10-3930-627-12.

engine work stand.

After removing the electrical

(2) Plug valve chamber oil return holes to prevent

accessories steam clean the basic engine or use any

parts falling into oil pan.

method that will get it clean enough for visual inspection

(3) Rotate crankshaft until lowest point of lifter

before disassembly.

travel is reached. Using valve spring compressor,

compress valve spring (15, fig. 3-1). Remove roto cap

3-3. Engine Repairs

assembly (18) and valve locks (17). Release and

remove valve spring compressor.

(4) Lift valves (11 and 12) out through top of

Many of the repair jobs which follow, taken separately,

cylinder block and tag them for installation in original

can be done without removing the engine from the truck.

positions.

However, should extensive maintenance be needed, it

(5) Remove valve springs and spring retainers

would be more practical to remove the engine before

(16) from the valve chamber.

beginning repairs. The mechanic doing the work is in

(6) Remove tappets (19) from cylinder block.

the best position to decide when engine removal is

Tag tappets for replacement in holes from which they

indicated. Procedures for specific jobs are given, as

were removed.

valve service, ring and bearing replacement, etc. No

attempt is made to define or outline what constitutes an

3-1