GMC Powertrain 4.3 L, Руководство по обслуживанию, Страница: 134 / 196

6-124 Marine/Industrial 4.3L Engine
2000 Marine/Industrial
334528
480571
4. Measure the alignment or surface flatness of the exhaust
manifold flanges using a straight edge and a feeler gauge.
Refer to
Engine Mechanical Specifications.
If the surface flatness is not within the specifications, the
exhaust manifold is warped and must be replaced.
Water Pump Clean and Inspect
Caution: Refer to Safety Glasses Caution in Cautions and
Notices.
1. Remove all the old gasket material from the water pump
sealing surfaces.
2. Clean all the dirt and any debris from the water pump.
3. Inspect the water pump for the following:
• Leakage or damage to the housing cover or gasket (1)
• Excessive scratches or gouging to the gasket sealing
surfaces (2)
• Leakage from the water pump vent hole (3)
A stain around the vent hole is acceptable. If leakage
occurred (dripping) with the engine operating and the
cooling system pressurized, then replace the water
pump.
• Damaged bolt hole threads (4)
• Excessive side-to-side movement of the water pump
shaft (5)
• Leakage around the water inlet pipe (6)
• Leakage around the heater hose pipe (7)
• Restrictions within the internal coolant passages