TM-9-2320-280-34
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1996
TM-9-2320-280-34 - Page 69 of 1258
3 - 5 . RIGHT CYLINDER HEAD REPLACEMENT
This task covers:
a.
Removal
b.
Installation
a. Removal
WARNING
• Cylinder head must be supported during removal and
installation. Failure to support cylinder head may cause injury
to personnel or damage to equipment.
• Gaskets on some 6.2L engines assembled prior to 1991 may
contain asbestos. Gaskets should be removed with a scraper or
putty knife then disposed of IAW current directives.
Inhalation
of asbestos fibers can cause respiratory ailments.
CAUTION
Cover or plug all hoses, ports, and/or fittings immediately after
disconnection or component removal to prevent contamination.
Remove all plugs prior to connection.
NOT E
The right cylinder head replacement procedures for all model year engines
are the same. Refer to engine decal model number on left rocker arm cover
before ordering replacement parts, since parts are not interchangeable.
1.
Remove cold advance switch (3) from cylinder head (4).
2.
Remove capscrew (1) from transmission dipstick tube (2) and cylinder head (4).
3.
Remove seventeen capscrews (5) from cylinder head (4) and cylinder block (6).
INITIAL SETUP:
To o l s
____
General mechanic's tool kit:
automotive (Appendix G, Item 1)
M a t e r i a l s / P a rt s
_____________
Gasket (Appendix E, Item 18)
Pipe sealing compound (Appendix B, Item 49)
Cylinder head lifting device (optional)
(Appendix C, Figure C-48)
Personnel Require d
________________
One mechanic
One assistant
Manual Refere n c e s
________________
TM 9-2320-280-20
TM 9-2350-280-24P
TM 9-2815-237-34
TM 9-2815-237-34P
Equipment Condition
_________________
• Right exhaust manifold removed
(TM 9-2320-280-20).
• Water crossover removed (TM 9 - 2 3 2 0 - 2 8 0 - 2 0 )
.
• Intake manifold removed (para. 3-17).
• Rocker arm shaft and pushrods removed (para. 3-8).
• Fuel injection return hoses removed
(±T±M 9±-±2±3±2±0±-±2±8±0±-±2±0±)±
.
• Fuel injection nozzles removed (para. 4-3).
• Glow plugs removed (TM 9±-±2±3±2±0±-±2±8±0±-±2±0±)±
.
M997, M997A1, and M997A2 only:
• Air compressor bracket removed (para. 14-26).
General Safety Instructions
______________________
• Cylinder head must be supported during removal
and installation.
• Gaskets installed on some 6.2L engines assembled
prior to 1991 may contain asbestos. Gaskets should
be disposed of IAW current directives.
Maintenance Level
_______________
Direct support
TM 9-2320-280-34
3 - 1 2
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