1674 DIESEL TRUCK ENGINE Caterpillar


Cylinder Head Assembly

Usage:

Remove Cylinder Head Assembly

start by:

a) remove fan drive

b) remove camshaft housing

1. Remove the coolant from engine.

2. Disconnect the fuel injection lines (2) from pump housing. Put plugs or caps in all lines and openings.

3. Remove the three bolts that hold the fuel filter (3) to the aftercooler housing.

4. Disconnect the sensing line (1) for the fuel ratio control from the aftercooler housing.

5. Disconnect the oil supply line (4) from the turbocharger.

6. Remove the two water lines (5).

7. Disconnect the water outlet line (6) for the air compressor from the cylinder head.

8. Remove the bolts (7) that fasten the cylinder head to the cylinder block.

9. Install 3/8"-16NC forged eyebolts in the cylinder head. Fasten a hoist and remove the cylinder head assembly. Weight of cylinder head assembly is 575 lb. (260 kg).

NOTE: Be sure to install a new gasket between the spacer plate and the cylinder block before installing the cylinder head assembly. See REMOVE and INSTALL SPACER PLATE in DISASSEMBLY AND ASSEMBLY.

Install Cylinder Head Assembly

1. Clean the top surface of spacer plate and the surface it is in contact with on the cylinder head.

2. Install the cylinder head gasket, water seals, and gasket on timing gear cover.

3. Install the 3/8"-16NC forged eyebolts in the cylinder head. Fasten a hoist and put the cylinder head assembly into position on the engine. Make sure the gear (1) in cylinder head is engaged with drive gear (2).

4. Put 9M3710 Anti-Seize Compound on the threads of the bolts for cylinder head. Install the bolts and washers. Tighten the bolts as follows:

1 -Tighten all bolts in number order to 135 lb.ft. (18.7 mkg).

2 -Tighten all bolts in number order to 185 ± 5 lb.ft. (25.6 ± 0.7 mkg).

3 -Tighten all bolts using hand torque only to 185 ± 5 lb.ft. (25.6 ± 0.7 mkg).

5. Install the two water lines (4).

6. Connect the oil supply line (3) to the turbocharger.

7. Connect the water outlet line (5) for the air compressor to the cylinder head.

8. Connect the sensing line (6) for the fuel ratio control to the aftercooler housing.

9. Put the fuel filter in position, and install the three bolts.

10. Remove the plugs and fuel injection lines and pumps. Connect the fuel injection lines (7) to the pumps. Tighten the nuts on fuel lines to 30 ± 5 lb.ft. (4.1 ± 0.7 mkg).

11. Fill the cooling system with coolant.

end by:

a) install camshaft housing

b) install fan drive

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