General Motors — 25-Hour Engine Inspection
Maintenance
From a General Motors owner's manual covering: Carb 5.7L, MP 5.0L, MP 5.7L, MP 6.0L. Check it applies to your exact model before use.
Before you start
- Crusader Marine Engines assumes no responsibility for the costs related to the 25-hour inspection. This is the owner's responsibility.
Procedure
- Change the engine oil and filter.
- Check and clean the primary fuel filter.
- Check the engine alignment.
- Inspect the accessory drive belt(s) and check the tension.
- Check all the fluid levels.
- Check the throttle and shift cable adjustments and freedom of movement.
- Inspect all cooling system hoses for leaks, damage and deterioration; check hose clamps for tightness.
- Inspect the entire exhaust system for leaks, damage and deterioration; check hose clamps for tightness.
- Check battery electrolyte level, specific gravity, case, cables and connections.
- Check for loose, missing or damaged parts, especially engine mounts, starter and alternator mounting fasteners.
Source: General Motors owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.