12. COOLING SYSTEM K-XCT 125i Remove four bolts and the water pump Bolts Water Pump Cover cover, gasket and two dowel pins. Impeller (Left Hand Threads) Remove the water pump impeller. The impeller has left hand threads. Seal Washer (Porcelain) Mechanical Seal Inspect the mechanical (water) seal and seal washer for wear or damage. The mechanical seal and seal washer must be replace as a set. Impeller 12-12