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This daily-driven 99 turbo has been
running an EWP for over three years.
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| by Mark Jeter |
updated: December 8, 2004 |
originally web-published June 27, 2001
This website shows how the original waterpump
in a Saab "B" engine can be eliminated and replaced with
a reliable, efficient Electric Water Pump.
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| Original equipment water pump
assembly showing stripped drive gears. |
This site is based on a 1978 99 and contains
specific instructions for converting that model. However, most
of the procedures outlined here are applicable to other models,
particularly 1971-on
Saab 99 and 1979 -1980
Saab 900 equipped with the "B" type engine.
This conversion can be completed
by the backyard mechanic with ordinary tools in a few hours.
The cost of the project
closely matches the cost of replacing the original pump.
The EWP is manufactured by Australian manufacturer Davies-Craig and
comes with a 2-year warranty. It weighs two pounds and is very
durable and well engineered.
An optional controller unit controls
the pump, only running it when necessary to keep the engine cool.
The pump can also be wired directly for continuous operation. This
website shows how to install an EWP both ways.
Converting a B-engine to an Electric Water Pump includes:
- Removing the original waterpump
- Sealing the cavities in the engine block
where the original pump was installed by installing freeze
plugs.
- Fabricating custom cooling hoses by modifying
parts of the original system.
- Wiring a relay into the electrical system.
- If using the optional controller, removing
the thermostat and replacing it with a temperature sensor.
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