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#Post#: 77002--------------------------------------------------
Fan blade removal
DIR By: Tigerbiker
Date: October 13, 2013, 8:13 am
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How easy is it to remove the fan blades from near the radiator?
Can it be done in situ? I'm thinking November to February Rusty
would be able to cope as I only do 5, possibly 20 miles at a
push at any one time. Would my engine overheat? Would I save
any fuel? Is it too dangerous to risk? Usually I just put a
custom cut black board up in front of the radiator that
restricts 80% of the air flow, helping both the rad and engine
to keep warmer. That works very effectively, rad has never
overheated. I'm happy with my anti freeze so not unduly
concerned about that freezing. Any experience/advice?
#Post#: 77003--------------------------------------------------
Re: Fan blade removal
DIR By: goinnowherefast
Date: October 13, 2013, 9:20 am
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I wouldnt do it,
the benefits would be minimal and if you got it wrong you will
imbalance it and it will vibrate wrecking the water pump
bearings....
#Post#: 77004--------------------------------------------------
Re: Fan blade removal
DIR By: GlenAnderson
Date: October 13, 2013, 9:25 am
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I think he meant remove them completely.
Four bolts and it's off. Use a couple of extra washers under
each bolt to make up for losing the thickness of the fan, so the
bolts don't jam on the pump body.
Will be fine without it until the weather warms up.
#Post#: 77005--------------------------------------------------
Re: Fan blade removal
DIR By: Tigerbiker
Date: October 13, 2013, 9:49 am
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Hmm... food for thought, thanks for both your replies. Anybody
else want to tip the balance, although I not a committed fan of
democracy.
#Post#: 77008--------------------------------------------------
Re: Fan blade removal
DIR By: Drew
Date: October 13, 2013, 10:04 am
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Absolutely no savings to be made by doing this for such short
trips...and you do, at worst, risk cooking the engine if it's a
petrol unit and you go a bit further than planned (a diesel will
take a bit more heat before it needs fanning).
I wouldn't bother, as you'll only be putting it back in a couple
of weeks when it evolves the weather men have got it wrong.
Just fit a rad-muff.
#Post#: 77014--------------------------------------------------
Re: Fan blade removal
DIR By: AlexB
Date: October 13, 2013, 10:58 am
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if it is only for 20 odd miles, wear thermal gloves you wuss
#Post#: 77041--------------------------------------------------
Re: Fan blade removal
DIR By: Bert the Bodger
Date: October 13, 2013, 2:00 pm
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Used to regularly remove fan in winter months from petrols
(other than LR) on commute of twenty odd miles. I don't think
I'd do it nowadays with an engine I valued...
Richard
#Post#: 77058--------------------------------------------------
Re: Fan blade removal
DIR By: Tigerbiker
Date: October 13, 2013, 3:04 pm
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Thank you all for your insight. I'll think I'll stick with the
Status Quo, "if it ain't broke, don't fix it" >rcker<
#Post#: 77101--------------------------------------------------
Re: Fan blade removal
DIR By: ant2f159
Date: October 13, 2013, 7:59 pm
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Another option would be to fult an electric fan? Either on a
normal switch or thermo control thing so it comes on only when
up to temperature. I like my engine to warm up quickly in winter
as im running on gas, and it does...
#Post#: 77164--------------------------------------------------
Re: Fan blade removal
DIR By: estwdjhn
Date: October 14, 2013, 2:19 pm
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--- Quote ---
> Absolutely no savings to be made by doing this for such short
trips
--- End Quote ---
I'd beg to differ on that.
Firstly, any time the fan is turning and isn't needed, it's
wasting fuel (quite a lot of fuel actually - at full revs, it
will be sucking several hp). I'd be fairly confident that unlike
many "economy devices" an electric fan replacing a mechanical
one delivers a measurable fuel saving. (I'd offer to be a guinea
pig and do the measuring, but non of my motors have had
mechanical fans for years - removing the fan is usually on of
the first things I do on a series motor).
Secondly, when the engine is cold (which will be most of the
time on short trips) is a particularly bad time to be running a
mechanical fan. Within reason, the hotter an engine is, the more
efficient it is - so the longer an engine takes to warm up (cos
someone is blowing cold air all over the place), the longer it
spends running inefficiently.
I'd think it's virtually impossible to overheat a std 2.25
cooling setup without a fan in winter - my 2.6 (with no fan, and
the same cooling system as a 2.25) can get a bit warm being
thrashed up hills in the height of summer, but is otherwise
fine. The only thing that could be unwise is very prolonged
periods of idling as with no airflow through the radiator
at-all, it might eventually overheat (depends on the ambient
temperature, but probably very unlikely between now and next
easter).
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