I agree with Alan, flipping the fan will not change the air flow direction.
And,
as Alan says, the fan blade pitch may be the culprit.
However, the fan "pulls" the air from front-to-back, through the radiator.
By opening the bonnet and looking, it should be a simple test to see that
the
fan is pulling the air through the radiator.
But; there other things to investigate, in no order:
* Is the radiator coolant at the correct level?
* Is the radiator blocked with leaves, bugs, debris, etc.?
* Are the radiator fins, or gills, straight and clean? If bent or clogged
they will
not be efficient and can cause overheating.
* Although the radiator cap is new, is it correct? Usually 7 pound/sq in.
* Is the radiator thermostat functional? Although new, if it is not
operating
correctly it may not be opening as expected.
* What is the radiator thermostat rating? Usually 160 or 180 degrees, but
there
may be other thermostats available, I'm not sure.
* Is the radiator core clean and functional, i.e. not clogged with crap (a
technical term)?
Flushing the radiator might resolve this issue.
* Is the anti-freeze mixture correct, and fresh? Anti-freeze can change
over time,
become polluted with radiator crap (see above), get diluted, etc. All of
these
will reduce the cooling efficiency, and can cause over-heating. See
above,
flushing and refilling should address this problem.
I believe these are the radiator basics, but if the engine is running hot
because of
timing problems, fouled plugs, etc. you should address those first.
Good luck.
Walt
'60 AN5
----- Original Message -----
From: "Alan Seigrist Blue 100" <healey.nut@gmail.com>
To: "Quinn, Patrick" <Patrick.Quinn@det.nsw.edu.au>
Cc: <healeys@autox.team.net>
Sent: Tuesday, May 16, 2006 7:38 PM
Subject: Re: Sprite Radiator Fan Direction
Patrick, mate...
If you flip the fan over it will still move air in the same direction,
as you've only flipped the fan over 180 degrees, not 90. Think about
it!
Ok, now that I've been very snotty about this... I should say that if
it is backwards, sometimes the pitch profile is such that it does not
move air as efficiently, causing overheating. The profile should be
such that the rounded side of the fan blade (i.e. like an airplane
wing) should always be facing forward. This way will maximize
airflow.
Best Regards,
Alan
'53 BN1 '64 BJ8
On 5/17/06, Quinn, Patrick <Patrick.Quinn@det.nsw.edu.au> wrote:
> G'day
>
> I have received a Sprite question that I am unable to answer and I
> thought someone out there would know.
>
> It concerns the pitch of the radiator fan fitted to a '67 Sprite. The
> car is experiencing overheating problems and after having the radiator
> serviced, new thermostat and radiator cap it is still doing the same
> thing.
>
> It's been suggested that perhaps the fan has been connected back to
> front and is trying to push air forward instead of drawing it backwards
> through the radiator. So the owner removed the fan and turned it around
> and it's still doing the same. He wants to know if there are left or
> right pitched fans and if the fans are reversed then does the air get
> pushed or pulled.
>
> Many thanks
>
> Patrick Quinn
> Sydney, Australia
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