Water Pump
- Loosen alternator bracket. Remove fan and drive belt. Loosen hose clamps and remove water pump.
- Using a suitable puller, remove fan hub from impeller shaft. Extract circlip and spacer ring from front of pump.
- Press impeller off shaft and pump bearing out of housing. Drive friction seal out of housing and lift out cover ring.
- Replace any worn or damaged parts. Using suitable tool, press impeller onto shaft until there is clearance of 0.031 - 0.047" (0.79 - 1.2 mm) between impeller and pump face.
Courtesy of BMW OF NORTH AMERICA, INC.
- Press fan hub onto pump shaft until a distance of 2.96-2.97" (75.1-75.5 mm) exists between hub flange and pump face (See Fig 2). To install, reverse removal procedure.
Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING SPECIFICATIONS
| Application |
Ft. Lbs. (mkg) |
| Cylinder Head Studs |
| |
Step 1 |
25-33 (3.5-4.5) |
| Step 2 |
43-47 (6.0-6.5) |
| Step 3 |
49-52 (6.8-7.2) |
| Main Bearing Caps |
42-46 (5.8-6.3) |
| Connecting Rod Bolts |
38-41 (5.2-5.7) |
| Flywheel-to-Crankshaft |
76-83 (10.5-11.5) |
| Rocker Arm Lock Bolts |
7-8 (0.9-1.1) |
| Oil Pan Bolts |
7-8 (0.9-1.1) |
| Camshaft Oiler (Hollow Bolt) |
8-9 (1.1-1.3) |
| Crankshaft Pulley |
101-108 (14-15) |
| Fuel Pump |
7-10 (1.0-1.4) |
| Timing Cover |
7-18 (0.9-2.5) |