5_108.bk Page 217 Thursday, October 4, 2001 11:45 AM
REPAIR INSTRUCTIONS Camshaft Installation
290
DESCRIPTION The M-E7 camshaft design uses large journals to decrease bearing loading and to allow for larger, more durable cam lobes. Both the camshaft driven gear and the fuel injection pump driving gear are pressed onto the shaft. Minimum Acceptable Cam Lobe Lift Camshaft Part No. 454GC5205
Exhaust and Intake Lobe 0.300 inch
(7.62 mm)
SPECIAL TOOLS REQUIRED r
Tappet Holders J 37720-B
r
Camshaft Removal/Installation Tool J 41461
INSPECTION 1. Thoroughly clean the camshaft. 2. Inspect the camshaft cam lobes. Replace the camshaft if cam lobes show evidence of cracking, pitting or scoring. 3. Inspect the journals. Replace the camshaft if the journals are scored or worn.
Figure 290 — Crankshaft Drive Gear Alignment
4. Use standard magnaflux inspection procedures to detect cracks. INSTALLATION 1. With the cylinder block in the stand, rotate the stand so that the crankcase is upward (engine inverted). 2. Rotate the crankshaft so that the drive gear timing mark is aligned with the camshaft opening. Refer to Figure 290.
Arrange valve lifters so that they can be identified and reinstalled into the same holes from which they came. 3. Clean the valve lifters. Lubricate the valve lifters by dipping them in clean engine oil, and insert them into the valve lifter holes in the block.
Visually check the camshaft to be sure that the two camshaft gears and the captured thrust washer are in place on the shaft. 4. Lubricate the camshaft journals and the camshaft bearing surfaces with clean engine oil.
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