IMPELLER 3972687 - Caterpillar

1. Remove cylinder head bolts (1) and (2).
When lifting the cylinder head assembly, care must be taken to keep cylinder head assembly level to prevent damage to the two cylinder head-to-spacer block dowels.
2. Lift the cylinder head assembly off the spacer block. The approximate weight of the cylinder head assembly is 99 kg (218 lb). The following steps are for the installation of the cylinder head assembly.3. Thoroughly clean the cylinder head assembly and spacer block surfaces.4. Position the head gasket and the cylinder head assembly onto the dowels in the spacer block. Lower the cylinder head assembly onto the spacer block.5. Install 6V4876 Lubricant on the threads of bolts (1) and (2), the washer, and the underside of bolt head; then install bolts. Tighten bolts (1) and (2) as follows:
Cylinder Head Bolt Tightening Sequencea. Tighten bolts 1 through 26 in number sequence shown to a torque of 150 15 N m (110 11 lb ft).b. Tighten bolts 1 through 26 in number sequence shown to a torque of 275 15 N m (200 11 lb ft).c. Retorque bolts 1 through 26 in number sequence shown to 275 15 N m (200 11 lb ft).d. Tighten bolts 27 through 33 in number sequence shown to a torque of 25 7 N m (18 5 lb ft).End By:a. install rocker arm assemblies and push rodsb. install electronic unit injectors (EUI)c. install valve covers and valve cover basesd. install coolant manifolde. install intake manifoldf. install exhaust manifold