Measure Crankshaft and Block Journals

MEASURE CRANKSHAFT AND BLOCK JOURNALS

NOTE: After any bearing damage occurred, remove all debris which is present in the main oil gallery, connecting rod bores, and in the crankshaft and oil galleries. Include removal of the inserting steel ball of the main oil gallery before cleaning.

1. Remove crankshaft.
2. Clean all engine parts thoroughly.

CAUTION: Replace all of the connecting rods when ever any of the rod cap bolts are loosened or bearing caps are removed

3. Inspect crankshaft, replace as necessary.
4. Inspect crankcase for damage.
5. Inspect crankshaft main bearing caps for damage.
6. Install the crankshaft main bearing caps and check for out of round. Replace as necessary.
7. Remove the main bearing caps and install the crankshaft with the correct selected bearings.

NOTE: Radial mounting of the main bearings of standard size crankshaft is possible by assigning the color-coded bearing shells. The upper main bearings can be identified by the four digit mark etched on the engine block below the high pressure pump. The lower main bearings can be identified by the code etched on the front of the crankshaft hub.

ASSIGNING CRANKSHAFT MAIN BEARING SHELLS

The upper main bearings can be identified by the four digit mark etched in the block below the high pressure pump. The lower main bearings can be identified by the code etched on the front of the crankshaft hub. This color code indicates which bearing shell halves are to be used.

1. Select the correct bearing shells based upon the crankcase and crankshaft identification marks.
2. Mount crankshaft axially using the thinnest thrust washer.
3. Inspect crankshaft end play. If the crankshaft end play is out of specification, remove the crankshaft and install the larger thrust shim. repeat the procedure until crankshaft end play is within specification.
4. Mount the crankshaft axially again and check each main bearing oil clearance with plasti-gauge. For bearing clearance specifications, Engine Specifications.