Inspection - continued - TM-10-3930-673-340145

TM 10-3930-673-34

NOTE

Cylinder head has integral valve

guides. Service valve guides can be

installed to meet tolerance

specifications after cylinder head is

machined.

(4)

Inspect valve guide bores.

Inspect valve guide bores for scuffing or

scoring. If guide bores are scuffed or

scored, service valve guides must be

TR00611

installed. See Step e. Repair.

(5)

Measure valve guide bore. Maximum

allowable diameter is 0.3185 in. (8.09 mm).

If guide bores are worn, service valve guides must be installed. See Step e. Repair.

(6)

Inspect valve seats.

(a)

Inspect valve seats for scoring, scratches, or burned condition.

(b)

If a valve seat is scored, scratched, or burned it must be ground or replaced. See

Step e. Repair.

(7)

Inspect valve springs (10).

Visually inspect valve springs for nicks,

deep scratches, rust deposits, notches at

end of spring, and for wear between coils.

(8)

Using valve spring tester, check

spring force.

Description

Specification

Test force

65.0 - 72.2 lb

(29.48 - 32.75 kg)

TR00612

Length under test

1.94 in.

force

(49.28 mm)

Free length after test

2.19 in.

(55.63 mm)

Spring must not be

0.039 in.

bent more than

(0.99 mm)

3-43