Oil Filter Housing Explanation

OIL FILTER HOUSING DESCRIPTION
The oil filter housing (Fig 1) #1 is located in the V of the cylinder block. The oil filter element is located within the housing and the engine oil cooler (Fig 1) #2 is attached to the top of the housing. Both the oil pressure and oil temperature sensors are located at the rear of the housing.

OIL FILTER HOUSING OPERATION
Oil flows from the engine oil pump to the oil filter housing inlet (Fig 2) #1 and to the oil filter element located within the oil filter housing. After the oil is filtered and then cooled it travels to the main oil gallery (Fig 2) #5. An oil filter by-pass is built into the housing and is not serviceable. Removing the oil filter cap from the housing allows oil to drain from the oil filter cavity into to the crankcase (Fig 2) #2.

Coolant flows from the right cylinder block water jacket (Fig 2) #3 and from the left cylinder block water jacket (Fig 2) #4 into the housing. The coolant flows through the oil cooler and exits the housing from the rear hose nipple (Fig 2) #6 where it is returned to the water pump. A coolant by-pass in the housing is designed to direct excessive coolant flow around the oil cooler for continuous circulation.

OIL FILTER HOUSING REMOVAL
1. Perform the fuel system pressure release procedure. Refer to FUEL SYSTEM PRESSURE RELEASE
2. Drain the cooling system. Refer to STANDARD PROCEDURE .
3. Remove the lower intake manifold. Refer to MANIFOLD, INTAKE, REMOVAL .
4. Disconnect the oil temperature sensor and oil pressure sensor electrical connectors (Fig 3) #3.
5. Remove five bolts (Fig 3) #1 and remove the oil filter housing.
6. Lift the oil filter housing and remove the heater hose (Fig 3) #2.
7. Remove and discard the oil filter housing seals (Fig 4) #2. The O-ring seal (Fig 4) #1 can be reused.
8. If required, remove the oil temperature sensor (Fig 5) #1 from the oil filter housing.
9. If required, remove the oil pressure sensor (Fig 5) #2 from the oil filter housing.

OIL FILTER HOUSING INSTALLATION
1. If removed, install the oil pressure sensor (Fig 5) #2 and tighten to the proper specification. Refer to
TORQUE SPECIFICATIONS
2. If removed, install the oil temperature sensor (Fig 5) #1 and tighten to the proper specification. Refer to TORQUE SPECIFICATIONS
NOTE: Always use new dry seals (Fig 4) #2 when installing the oil filter housing. Lubricate the
O-ring seal (Fig 4) #1 with clean engine oil prior to installation.
3. Install new oil filter housing seals onto the oil filter housing.
4. Install the heater hose (Fig 3) #2 to the oil filter housing.
5. Position the oil filter housing on the engine block.
6. Loosely install the five oil filter housing retaining bolts (Fig 3) #1.
7. Tighten the oil filter housing bolts in the sequence shown in illustration (Fig 6) to the proper specification. Refer to TORQUE SPECIFICATIONS
8. Connect the oil pressure sensor and electrical connector (Fig 3) #3.
9. Connect the oil temperature sensor and electrical connector (Fig 3) #3.
10. Install the lower intake manifold. Refer to MANIFOLD, INTAKE, INSTALLATION
11. If required, install the oil filter and fill the engine crankcase with the proper oil to the correct level. Refer to STANDARD PROCEDURE
12. Fill the cooling system. Refer to STANDARD PROCEDURE
13. Operate the engine until it reaches normal operating temperature. Check cooling system for correct fluid level. Refer to STANDARD PROCEDURE