78. Water Crossover Cleaning and Inspection
Water Crossover Cleaning and Inspection
Cleaning Procedure
1. Clean the water crossover in solvent.
Warning: Refer to Safety Glasses Warning (Safety Glasses Warning).
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.