79. Water Crossover Cleaning and Inspection
Water Crossover Cleaning and Inspection
Cleaning Procedure
1. Clean the water crossover in solvent.
Caution: Refer to Safety Glasses Caution in Service Precautions.
2. Dry the water crossover with compressed air.
Inspection Procedure
1. Inspect the water crossover for the following:
^ Corrosion or damage to the threads for the MAP sensor bracket bolt (1).
^ Corrosion or damage to the water pump drive belt tensioner/shield mounting bolt holes (2)
^ Corrosion or damage to the water pump sealing area (3)
^ Corrosion or damage to the gasket sealing surfaces (4)
^ Corrosion or damage to the plenum duct sealing area (5)
2. Inspect the water crossover for the following:
^ Corrosion, restrictions or damage to the seal/gasket sealing surfaces for the following:
- MAP sensor vacuum source port (1)
- Brake booster vacuum hose source port fitting (2)
- EVAP emission canister purge valve port (4)
- EGR valve port (8)
- EGR inlet pipe port (10)
- Throttle body mounting surface (17)
^ Corrosion or damage to the threads for the following connections:
- EVAP emission canister purge valve mounting bolt hole (3)
- Fuel rail bracket mounting bolt hole (6)
- EGR valve mounting bolt holes (7)
- EGR inlet pipe mounting bolt holes (9)
- Water pump cover bolt holes (13)
- Engine coolant outlet fitting hole (15)
- Engine lift bracket bolt holes (16)
^ Corrosion or damage to the throttle body fastener bolt holes (5)
^ Corrosion or damage to the heater inlet fitting (11)
^ Corrosion or damage to the fastener bolt holes (12)
^ Corrosion or damage to the radiator hose outlet (14)
3. Inspect for damage or serviceability the following components:
^ Water pump and seal
^ Thermostat and seal
^ Water outlet
^ Water pump cover and seal
^ MAP sensor and seal
^ Automatic transmission range selector lever clamp bracket
^ Throttle body
^ Throttle body O-ring
^ Throttle body spacer
^ EGR valve
^ EGR bracket shield
^ EVAP emission canister purge valve
^ Rear lift bracket
^ Engine coolant outlet fitting
^ Heater inlet fitting
^ Bolts and fasteners
4. Repair or replace the water crossover and/or components as necessary.