[Tigers] Cooling Fan

[Owain Lloyd]

I think michael hit the nail on the head.  first need to know is it
overheating when stationary / moving slowly or at speed?

a pusher fan will only help at very low speed or when stopped.  and spal is
the go to brand.   still need the horn holes and gap between cross member
and rad blocked.  cardboard and zip ties does the trick quickly and can be
replaced with a more permanent solution later if you want.  also need a fan
shroud.

personally i've never needed the electric pusher fan because i have a small
13" flex fan on the water pump pulley.  that creates enough pull through
the radiator at idle.

if its overheating at more than 30/40mph then its another problem entirely
and there are a variety of other things to check.

in my case its fuel boiling in the carb under certain conditions (slowing
down after running fast in really high ambient temps above a particular
altitude) rather than coolant temp which is the problem.  there are a bunch
of things i could do there, most importantly a carb heat shield, but
i've only suffered from it once.

one thing i've found very useful for debugging cooling issues in the tiger
over the years is having a glass gano filter in the rad top hose.  at least
you can see how the coolant is circulating which helps with thermostat or
water pump issues and if you're used to how it should look, even how
blocked the radiator is.


On Wed, Jul 19, 2023 at 7:41 AM Jim B via Tigers <tigers at autox.team.net>
wrote:

> I’ve been reading about cooling issues with tigers for more that a decade
> (much less than some reading this) blocking horn holes, pusher fans, and
> shrouds etc etc. Entire studies have been done on this issue. Just check
> STOA, CAT or any club site. All good reads! I think the first place to
> start is knowing what the actual engine team really is. We all know that
> the original temp guage can be off. The other thing is: as a dyed in the
> wool ford guy, 185 degrees is the optimal engine temp. But, Ford engines
> can get to 195-200 degrees easily and that is not necessarily a bad thing.
> Yes, I put a pusher in mine only because I had one. I’m not really sure is
> does anything. My original guage can show 225-230 on  a hot day (humidity
> plays a bitg role) but never has pucked out fluid. The design of the should
> is an issue. It lets hot air from the engine compartment to get under the
> radiator. Many, many, ‘fixes’ that can be done. However, on a hot low
> humidity day.. well good luck. JMO
>
> On Jul 18, 2023, at 8:40 PM, Allan Ballard <aballard at ix.netcom.com> wrote:
>
> The article includes several suggestions.
>
> One of them is to seal the missing section of the stock fan shroud at the
> bottom.
>
> A list member offered a piece he fabricated.
>
> I obtained one and here are a couple of pictures. I hope to fit it later
> this year.
>
> Even a few degrees of cooling will be worth the effort.
>
> Allan Ballard
> Mk1a Tiger
>
> [image: image0.jpeg][image: image1.jpeg]
>
> Sent from my iPhone
>
> On Jul 18, 2023, at 10:57 PM, Jay Laifman <jay.laifman at gmail.com> wrote:
>
> 
> Have you looked at this cooling suggestions?
> http://tigersunited.com/techtips/SteveLaifmanValance/pt-SteveLaifmanValance1.asp
>
> It works great in Southern California heat.
>
> On Tue, Jul 18, 2023 at 3:42 PM Joe Brown <jbbrown1980 at gmail.com> wrote:
>
>> My Tiger can't keep up with this 100 degree weather in Texas.  I've read
>> through the article by Tiger Tom and Chuck King and I will make some of the
>> suggested modifications.  They listed two different pusher electric fans in
>> the article but both of them are no longer available.
>>
>> So, has anybody recently installed a pusher fan?  If so, what part
>> numbers?
>>
>> Thanks,
>> Joe Brown
>> _______________________________________________
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