GMC Powertrain 4.3 L, Service Manual, Page: 98 / 196

6-88 Marine/Industrial 4.3L Engine
2000 Marine/Industrial
334499
188095
Camshaft and Bearings Clean and Inspect
Tools Required
J 7872 Magnetic Base Dial Indicator
Caution: Refer to Safety Glasses Caution in Cautions and
Notices.
1. Clean the engine camshaft in cleaning solvent.
2. Dry the engine camshaft with compressed air.
3. Inspect the camshaft retainer plate fro damage.
If the camshaft retainer plate is damaged, replace as
necessary.
4. Inspect the camshaft bearings for correct fit into the engine
block camshaft bearing bores.
The camshaft bearings have an interference fit to the engine
block camshaft bearing bores and must not be loose in the
engine block camshaft bearing bores.
Important: If any camshaft bearing is excessively worn or scored,
replace all the camshaft bearings.
5. Inspect the camshaft bearings for excessive wear or
scoring.
6. Inspect the engine camshaft for the following:
• Worn, scored or damaged bearing journals (1)
• Worn engine camshaft lobes (2)
• Damaged bolt hole threads (3)
• Damaged camshaft sprocket locator pin (4)