[DaimLan] Daimler V8 Cooling Fan


(jagkiwi) #1

Hi all,

I have recently purchased a '63 Daimler V8, but noticed it has
an electric fan fitted, which doesn’t seem to be coming on,
even when the engine is warm.

Across the net, I’ve seen a few ‘‘aftermarket’’ radiators etc.
and electric fans for sale on these models. Is this common and
was the an issue with the older viscous fans?

I am new to this model and have had mainly the later X300s, XJS
and XJ6 SI, II and III models.

Can anyone shed light on this and should I go back to the
original fan system? I presume the electric one fitted is on
some kind of thermostat - or shou;d it be going, like later
ones, when ignition is on?

Thanks in advance!–
jagkiwi
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(Roger Holmes, Microspot) #2

Hi jagkiwi,

The engine compartment was designed for a straight six so with our cars with a V8, it leaves enough room for both an electric fan and a viscous coupled fan. Of course the electric fan could also be mounted in front of the radiator. My electric fan is wired through a thermostat to the permanently live feed, and often when I turn off the ignition, within a few seconds heat builds up so the electric fan turns on, preventing the common problem of the radiator boiling over when stopping at a petrol station.

If you have a Kenlowe fan, there should be an adjustable thermostat with a copper pipe leading to the sensor in the radiator top hose.

Roger Holmes,
1969 V8-250On 7 May 2015, at 21:22, jagkiwi idl@snap.net.nz wrote:

Hi all,

I have recently purchased a '63 Daimler V8, but noticed it has
an electric fan fitted, which doesn’t seem to be coming on,
even when the engine is warm.

Across the net, I’ve seen a few ‘‘aftermarket’’ radiators etc.
and electric fans for sale on these models. Is this common and
was the an issue with the older viscous fans?

I am new to this model and have had mainly the later X300s, XJS
and XJ6 SI, II and III models.

Can anyone shed light on this and should I go back to the
original fan system? I presume the electric one fitted is on
some kind of thermostat - or shou;d it be going, like later
ones, when ignition is on?

Thanks in advance!

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(jagkiwi) #3

In reply to a message from Roger Holmes sent Fri 8 May 2015:

Hi Roger,

Many thanks for that.

It seems to have a weird aftermarket fan - round like a
wheel with no shroud around it, unlike other electric fan
units. Looks more like an A/C round fan that’s be shoved
there with no shroud (in front of the radiator).

I’ll have a look at the thermostat at the top of the
radiator. Seems an odd job as someone has put blue-tack
around the sensor (there’s no leaking) :-/

It has been running almost to mid-temperature and the fan
still won’t go on. Tried all connections etc., but nothing.
It goes to a relay it appears and then into the main box
with an in-line fuse, that appears fine.

Would you suggest buying and fitting an original viscous fan
as well, even if I get this one going? It only has this
electric fan and there seems heaps of room for the original
fan as you note.

Thanks–
jagkiwi
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(GNB) #4

In reply to a message from Roger Holmes sent Fri 8 May 2015:

Generally placing an additional fan Electric in front of the
radiator blocks the cooling air. A puller is more efficient.
FWIW–
DAIMLER : V8 SALOONS SAFELY FAST AND BUILT TO LAST
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(PeterCrespin) #5

In reply to a message from jagkiwi sent Fri 8 May 2015:

The round fans with a circumference band are their own
shroud. They prevent air spilling off the ends of the
blades and suck through the full area of fan.

Of course a well-designed shroud will pull through a full
rectangular radiator from a smaller round fan by creating a
low-pressure area behind the core (assuming the shroud is
well sealed and fan the right size). Try an infra red
thermometer to check the real temp and it may well be too
low to trigger a fan, which is perfectly fine. Run a direct
feed to it and if it’s dud it’s dud, but you might just not
need it at your running temp. 90C is perfectly OK if it’s
stable.–
1E75339 66 D, 1R27190 70 FHC, 79 S2 XJ12L
Gaithersburg, Maryland, United States
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(paul49) #6

In reply to a message from PeterCrespin sent Mon 8 Jun 2015:

Hi I have fitted an after market electric fan into the
original shroud so it pulls the air through the radiator.
The standard fan with clutch is both expensive and heavy.
My fan rarely comes on and the car usual sits at about 80c
on the open road.
Cheers
Paul–
The original message included these comments:

In reply to a message from jagkiwi sent Fri 8 May 2015:


paul49
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