CHAPTER 7. ASSEMBLY OF ENGINE

CHAPTER

ASSEMBLY

ENGINE

Section

GENERAL

7-1.

Cleanliness

pound FSN

9150-663-1770

reduce

the

friction.

The engine is a precision product and extreme

Note. When using a torque wrench, the final

care and cleanliness must be exercised in all

reading must be taken while the nut, cap screw,

phases of assembly operations to

insure

or bolt is turning. When torque reading is close

satisfactory engine performance. Dirt and dust,

to that specified when wrench is at the end of its

even in minute quantities, are abrasive. After

swing, back off the nut slightly and change

cleaning

and

just

before

assembly,

coat

all

wrench position; then pull to the desired reading

bearings, shafts, a n d c o n t a c t s u r f a c e s w i t h

while the nut is turning. To start a partially

engine

oil

(OE).

This

will

insure s u f f i c i e n t

tightened nut will require a much higher torque

lubrication of moving parts when first put into

than that required to keep a nut turning. The

operation.

ratio of pounds-torque to pounds-pull on a bolt is

7-2.

General

Assembly

Instructions

not an even ratio and excess torque may easily

a. Gaskets. Always use new gaskets when

overstress the bolt. Under-torquing bolts and

assembling the engine. Use new preformed

studs subject to cyclic loads such as cylinder base

packings and annular copper gaskets throughout

studs and connecting rod bolts will result in

engine assembly. An engine overhaul parts kit

fatigue failures. It is therefore important that the

2815-678-4245, consisting of all necessary

torque values specified in this manual

gaskets and preformed packings, is available for

followed to avoid failures of fasteners.

use during engine overhaul.

Note. Do not exceed torque specified.

b . Kits and Sets. S e v e r a l o f t h e c o m p o n e n t s o f

d. Lock Nuts, Tab Washers, Locking Wire,

the engine are available in kits or sets. Whenever

Lock Washers, and Cotter Pins. All bolts and

a kit or set is used for parts replacement, all

nuts should be secured with lock nuts, tab

components of the kit or set should be installed,

washers, locking wire, lockwashers, or cotter

except for the auxiliary oil filter parts kit, FSN

pins, as specified. Many engine failures have

2940-884-4801. This kit is the universal type.

been traced to neglect of this simple precaution.

Refer

Appendix

for

specific

information.

7-3.

Installation

Instructions

c. Attaching Parts. W h e n t o r q u e t i g h t e n i n g

Note. References to figures in this Chapter

nuts,

bolts,

and

screws,

and

torque

are listed in the reverse order of disassembly both

specification

is n o t noted

the

text

in text and tables, which is the sequence required

illustration covering the installation, it is un-

to accomplish reassembly of the engine; i.e., 5-

derstood

that

the

standard

torque

values

24 through 5-11.

paragraph 6-7 prevail. Whenever a nut, bolt, or

screw requires that special attention be given, the

Usually the step-by-step procedure to be

followed for installing subassemblies on the

torque

value

will

noted

the

text

illustration pertaining to that operation. Torque

engine are given immediately following the

removal procedure in Chapter 5. This method of

wrench readings are of no value, unless properly

installation will be used throughout this chapter

used. It must be understood that it is not the

unless otherwise indicated in the contents table

force necessary to turn the nut, bolt, or screw

immediately following each paragraph. Each

that is important, but the resultant pull on the

contents table lists engine components, grouped

part that completes the union. Therefore,

in proper assembly order, and the appropriate

resistance of the nut to turning must be kept to a

paragraph reference and / or figure reference for

minimum.

Threads must be clean and un-

installation procedures.

damaged, and lubricated with antiseize com-

7-1