Oil Pump Service/Inspection

Fig. 145 Oil pump exploded view. 5M-GE, 7M-GE & 7M-GTE engines:

5M-GE, 7M-GE & 7M-GTE ENGINES

Disassembly

1. Remove oil strainer subassembly and oil pump cover, Fig. 145.
2. Remove rotors, relief valve plug, spring and valve.
3. Remove snap ring, spacer, driveshaft gear, key and shaft subassembly.
4. Reverse procedure to assemble.

Inspection

1. Check relief valve for scoring or wear. If damaged, replace valve or pump assembly.

Fig. 146 Checking clearance between driven gear & body. 5M-GE, 7M-GE & 7M-GTE engines:

2. Measure clearance between driven gear and body, Fig. 146. If clearance is greater than .008 inch, replace gear and/or body.

Fig. 147 Checking gear backlash. 5M-GE, 7M-GE & 7M-GTE engines:

3. Measure backlash between driven and drive gears, Fig. 147. If backlash is greater than .035 inch, replace shaft assembly and drive gear, if necessary.

Fig. 148 Checking side clearance. 5M-GE, 7M-GE & 7M-GTE engines:

4. Place a straightedge between rotors and housing, then measure side clearance between rotors and straightedge, Fig. 148. If clearance is greater than .0006 inch, replace gears and/or body.