Is it fitted right up to the radiator and are the tips of the blades
fitted with a circular band or are you using a shroud? It is imperative
that as little as possible air can escape around the fan, make sure all
air goes through the radiator, seal the gaps around the shroud if
present. Pushing or pulling does not make any difference.
Do not leave the fan run continuously, switch it through a thermoswitch
and relay. As soon as you gather speed the flow of air is usually
sufficient to cool properly. Remove the fan on the waterpump.
All assuming your radiator is in top condition. If it is silted up, have
the core renewed with a higher efficiency core. Having the radiator
cleaned or rinsed with caustic soda may help a bit for a while but it is
pretty useless in the long run.
Kees Oudesluijs
NL
Jeff Pelletier wrote:
> The fan is on constant (as soon as I turn key..) ... it is on the outside of
> the radiator blowing air toward the engine .,.. the fan is rather large
> covers much of the size of the radiator.. and yes I do have a fiberglass fan
> on the waterpump side also...
>
> Thanks
>
> Jp
>
>
>
>
> Jeff,
>
> What size is the electric fan, where is the thermoswitch positioned and
> what are the switching temperatures?
> The story about inhibiting airflow through the radiator is B..S.. as it
> will turn in the airflow. There is only the small area of the fan motor
> that may cause some disturbance.
>
> I like to run my engines fairly hot, on most LBC engines I use switching
> temperatures from the electric fan of around 96:C on and around 89:C off
> when the thermoswitch is positioned in the cilinder head, thermostat
> cover, water pump, top radiator hose or in the top radiator tank. If the
> switch is in the bottom tank I would use switching temperatures of about
> 15-20:C lower. Also fit a manual override switch.
> The engine's thermostat is best chosen between 80:C and 86:C in this set up.
>
> On all cars I own and have owned with fixed fans, I removed them and
> fitted electric fans controlled by a thermoswitch (Triumph Spitfire,
> Renault 4, Jensen Healey, Landrover SIII etc). It is the only practical
> (and cheap) solution in modern traffic.
>
> Kees Oudesluijs
> NL
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