TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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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. NOTE 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: Tools ____ General mechanic's tool kit: automotive (Appendix G, Item 1) Materials/Parts _____________ Gasket (Appendix E, Item 18) Pipe sealing compound (Appendix B, Item 49) Cylinder head lifting device (optional) (Appendix C, Figure C-48) Personnel Required ________________ One mechanic One assistant Manual References ________________ 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 9-2320-280-20). • Intake manifold removed (para. 3-17). • Rocker arm shaft and pushrods removed (para. 3-8). • Fuel injection return hoses removed (TM 9-2320-280-20). • Fuel injection nozzles removed (para. 4-3). • Glow plugs removed (TM 9-2320-280-20). 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 3-12 Change 1