Section 8 - Cooling System - Group 08 Water Pump - Rebuild (8-02) M11 Page 8-21 Caution: The use of any tool other than Part No. 3823815 can result in seal damage. Use the water pump seal driver, Part No. 3823815, to press the seal into the water pump body. Apply one drop of Loctite 290 Y , Part No. 3823682 or equivalent, to the joint between the water pump shaft and the water pump seal. Install the water pump body in an arbor press with the impeller end of the shaft facing up. Support the bottom end of the shaft. Press the impeller on the shaft until the step inside the impeller bore contacts the shaft.
Use a dial depth gauge to measure the distance from the impeller hub to the water pump body surface. Impeller Hub to Body Surface mm in 13.52 MIN 0.532 13.72 MAX 0.540 If the distance from the impeller hub to the body surface is greater than the maximum specification, use the water pump impeller puller kit, Part No. 3376542, to move the impeller to the correct distance.