Remove any additional hose fittings from the cover, as
these will be installed on the new Boyesen cover. Clean
any parts that show signs of calcium buildup or rust.
To remove the water pump impeller you will need an
electric or air impact gun. Stick with a small 3/8-inch drive
model. You don’t want to resort to brute force that can
damage the impeller shaft. This can sometimes be done
with putting the engine in gear, but it takes more force.
With the impeller removed, inspect the shaft and seals
for any scoring that can cause leakage. Spin the bearings
to make sure they spin smoothly with no play, rumbles or
grinding sounds. If any of these parts need to be replaced,
now is the time to do so.
To install the new impeller you will install the small
washer onto the impeller shaft. Tighten the impeller to
factory torque specs. Install the new side cover, and torque
the bolts to the recommended settings.
Install the new radiator hoses, copying the factory hose
routing. Pay particular attention to the clearance around
the exhaust system. With the hoses installed and clamped
in place you can now begin filling the radiator with fluid.
We used an Evans waterless coolant. Evans and other
waterless brands require the system to be clean and dry.
Normal coolant or water will contaminate it. ❏