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ELECTRIC FAN CONVERSION
by Dave Barton
This page will outline a simple and inexpensive primary electric fan conversion
for the Volvo 240 and 740. While there are many options for your Volvo when
it comes to keeping cool, this one is presented at face value with no specific
claims, other than my own experiences.
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The fan depicted is from an early to mid-eighties Buick, Chevy or other
General Motors mid-sized car with the front-wheel-drive 4 cylinder or V-6.
(Sorry about the photo quality.) It is made by AC Delco and is designed
to be a primary fan for the car it originated in. This fan will cost
between $10 and $30 from a self-serve auto salvage facility. Dimensions
for this fan are as follows: Height and width = 17 inches, Depth at
shroud housing next to motor = 3 1/8 inches, Depth at rear of fan motor
= 4 1/4 inches, Fan blade diameter = 14 inches. |
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The original mounting ears will need to be removed for fitment to a Volvo
radiator. A hacksaw does just fine here. In the photo to the right
the "ears" have been cut off, but are left next to the fan so you can see
where they were. |
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You'll need some mounting hardware. The simplest method will be with
sheet metal screws, washers and these funny little sheet metal nuts. |
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The photo to the right shows an existing hole in the top flange of the
radiator. All Volvo rafiators will have these holes for mounting of the
original fan shroud. The sheet metal nut can be used here. You will then
need to drill a small hole in the new fan shroud directly over the original
hole.
The fan is held to the radiator by four such screws, two at the top and
two at the bottom. You may need to drill the holes in the bottom flange.
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Here we have the new fan mounted to the radiator. This can be placed
in the car as one unit and mounted as original. |
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On my own Volvo, I run this fan in addition to an OEM "pusher fan" in
front of the AC condenser, however I believe the front fan to be fairly
worthless. The Delco fan is very powerful and will cool most any Volvo during
the summer.
My own conversion uses a Hayden adjustable temperature relay, which has
a temperature probe that is placed in the fins of the radiator. There are
many options for switching the fan on, however I recommend the use of a
relay for the main power to the fan.
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