D349 VEHICULAR ENGINE Caterpillar


Left Rear Cylinder Head Assembly

Usage:

Remove Left Rear Cylinder Head Assembly

preparatory steps:

a) remove left rear camshaft housing

b) remove fuel injection lines (left side only)

c) remove turbochargers

1. Remove exhaust manifold coupling-to-elbow mounting bolts (2). Remove elbow-to-cylinder head mounting bolts (1). Remove elbow assembly.

2. Remove aftercooler rear water line (4). Remove the support assembly-to-left cylinder head mounting bolts (3). Loosen the support assembly to right cylinder head mounting bolts.

3. Remove the governor to cylinder head rear support bracket (5).

4. Loosen water ferrule clamp (6) and remove water ferrule assembly. Remove the three exhaust manifold adapter bolts (7), on Industrial engines only. Remove the cylinder head retaining bolts.

5. Install three 3/8"-16NC forged eyebolts in head assembly. Attach a hoist and remove the cylinder head assembly. Weight is 300 lbs. (136 kg).

NOTE: Always replace the gasket between spacer plate and cylinder block before reinstalling cylinder head assembly. See REMOVE SPACER PLATES.

Install Left Rear Cylinder Head Assembly

1. Clean the top surface of spacer plate and mating surface of cylinder head. Install a new head gasket and seals (1).

NOTE: Be sure the gasket between spacer plate and cylinder block has been replaced before installing cylinder head assembly. Refer to REMOVE AND INSTALL SPACER PLATES.

2. Attach a hoist and position the cylinder head assembly on engine.

3. Coat the threads of the cylinder head bolts and the exhaust manifold adapter retaining bolts with 9M3710 Anti-Seize Compound. Install the cylinder head bolts and washers. Tighten the bolts in following Step sequence:

1 Tighten all bolts in numerical order to 175 lb. ft. (24.2 mkg).

2 Retighten all bolts in numerical order to 250 lb. ft. (34.6 mkg).

3 Finally retighten all bolts by hand in numerical order to 250 lb. ft. (34.6 mkg).

4 Again tighten bolt (9) between the two heads to 250 ± 10 lb. ft. (34.6 ± 1.38 mkg).

4. Install a new gasket, and install the exhaust manifold adapter retaining bolts.

5. Install the water ferrule and seal assembly (2). Tighten the bolt in the clamp for the water ferrule and seal to 30 ± 5 lb. in. (34.56 ± 5.76 cm.kg). Install the governor-to-cylinder head rear support bracket.


NOTICE

Do not tighten the bolt more than the specification. If the bolt is tightened more, the seal will be damaged.


6. Install the aftercooler rear water line (3). Install support-to-left cylinder head retaining bolts. Tighten support-to-right cylinder head retaining bolts.

7. Coat the threads of the exhaust elbow coupling bolts with 9M3710 Anti-Seize Compound. Install elbow assembly (4).

concluding steps:

a) install left rear camshaft housing

b) install turbochargers

c) install fuel injection lines (left side only)

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