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Crank Pulley
Water Pump
Pulley
Water Pump
Pulley
Crank Pulley
Alternator
Pulley
Alternator
Pulley
SECTION 3: DISABLE EXISTING MECHANICAL WATER PUMP
Davies Craig has tailor made EWP Header-Adaptor Kits – visit the website for
details, see image below (Part#8630).
1.
You may choose to by-pass the belt-driven water pump pulley by installing a
shorter belt. This option may not be possible if the crank pulley drives a belt-
driven power steering and fan or unless you replace the mechanical fan with a
Davies, Craig Thermatic
®
Fan. For example see
Figure
4
below:
2.
Remove the thermostat from the thermostat housing.
3.
Re-fit the thermostat housing ensuring that there is no damage to the
thermostat-housing gasket.
OR
1.
Remove the existing belt-driven water pump housing.
2.
Remove the water pump impeller from the pump shaft. (NOTE: You may
need to drill holes through the impeller close to the drive shaft.)
Alternatively, remove vanes from impeller. Mechanical water pumps differ
from engine to engine and you need to take appropriate action that suits
the specific water pump to disable the pump.
3.
Re-fit the water pump housing without the impeller ensuring that there is
no damage to the water pump gasket and the pump seal is still retained.
Re-fit the water pump belt and tighten to manufacturer’s specifications.
BEFORE
AFTER
Figure 4: Belt Orientation Diagram
Part #8630 -
EWP Header-Adaptor Kit (Ford Big Block)
