From: Ray O on

"HiC" <brassplyer(a)yahoo.com> wrote in message
news:cb37462d-8f73-4eb7-8280-e1bca1768887(a)e4g2000hsg.googlegroups.com...
> On Nov 18, 10:13 pm, Hachiroku ハチロク <Tru...(a)AE86.gts> wrote:
>
>>
>> Mine spins tight when cold, but also tight when hot. Not quite as tight,
>> but you can't spin it with a flick of the wrist, either. It moves 3-4
>> blades when spun hot.
>
>
> I keep reading that they're supposed to be loose when cold, tight when
> hot...?

You don't have to take my work for how the fan clutch works, check this web
site:
http://news.carjunky.com/how_stuff_works/car_fan_clutch_what_is_it_c387.shtml
or google "engine fan clutch"
--

Ray O
(correct punctuation to reply)


From: HiC on
On Nov 18, 11:07 pm, "Ray O" <rokigawaATtristarassociatesDOTcom>
wrote:

> > I keep reading that they're supposed to be loose when cold, tight when
> > hot...?
>
> You don't have to take my work for how the fan clutch works, check this web
> site:http://news.carjunky.com/how_stuff_works/car_fan_clutch_what_is_it_c3...
> or google "engine fan clutch"


Oh, I believe you, I just don't see the ones I have behaving that way.
Either the one that's about a year old or the one I got the other
night. I'm wondering about whether the Autozone models are decent.
Torquflo is the brand name cast into the body of the clutch. I assume
it's some in-house brand, made in China of course.

> Also, make sure you hve the proper coolant mix - too much or too little
> concentrate can cause overheating.


I've been going with the 50/50 stuff, should that be good?

As a follow-up, I found that the thermostat that was in there was 195
deg. I replaced it with a 180 degree and after running around for
about 45 mins parked idle, stopped at lights, 80 on the highway and
various points in between, the temp gauge appears to be back to pretty
well locked in the center of the normal range as it once was. Once
warmed up it varied maybe the space between two painted dots on the
gauge.

Maybe there's nothing wrong with it running hotter but it makes me
nervous when that needle edges up toward the red end. Or maybe the 195
deg thermo wasn't flowing adequately.
From: Hachiroku on
On Sun, 18 Nov 2007 19:39:01 -0800, HiC wrote:

> On Nov 18, 10:13 pm, Hachiroku <Tru...(a)AE86.gts> wrote:
>
>
>> Mine spins tight when cold, but also tight when hot. Not quite as tight,
>> but you can't spin it with a flick of the wrist, either. It moves 3-4
>> blades when spun hot.
>
>
> I keep reading that they're supposed to be loose when cold, tight when
> hot...?


LOL! Yeah, ordinarily, but we're talking AutoZone/Chinese parts here,
unless you sprung the Toyota OEM price for the Beck/Arnley, and then if
you did you should have gone to Toyota in the first place!!! :)

Mine spins stiffly when cold, then loosens as it gets warmer and then
locks when hot. Once the car gets up to operating temp, the fan spins
quite freely, and when hot is quite stiff. But it is also stiff when the
engine is cold, too.


From: Ray O on

"HiC" <brassplyer(a)yahoo.com> wrote in message
news:c0548257-48ad-4142-9a1c-03aa68e45838(a)a28g2000hsc.googlegroups.com...
> On Nov 18, 11:07 pm, "Ray O" <rokigawaATtristarassociatesDOTcom>
> wrote:
>
>> > I keep reading that they're supposed to be loose when cold, tight when
>> > hot...?
>>
>> You don't have to take my work for how the fan clutch works, check this
>> web
>> site:http://news.carjunky.com/how_stuff_works/car_fan_clutch_what_is_it_c3...
>> or google "engine fan clutch"
>
>
> Oh, I believe you, I just don't see the ones I have behaving that way.
> Either the one that's about a year old or the one I got the other
> night. I'm wondering about whether the Autozone models are decent.
> Torquflo is the brand name cast into the body of the clutch. I assume
> it's some in-house brand, made in China of course.

The problem with using aftermarket parts is that their quality is a hit or
miss and you have to experiment to find good ones. Some work fine, others
do not. The automaker has done all the experimenting with OEM parts so you
know how they will work.

>> Also, make sure you hve the proper coolant mix - too much or too little
>> concentrate can cause overheating.
>
>
> I've been going with the 50/50 stuff, should that be good?

50/50 is just right!

>
> As a follow-up, I found that the thermostat that was in there was 195
> deg. I replaced it with a 180 degree and after running around for
> about 45 mins parked idle, stopped at lights, 80 on the highway and
> various points in between, the temp gauge appears to be back to pretty
> well locked in the center of the normal range as it once was. Once
> warmed up it varied maybe the space between two painted dots on the
> gauge.
>
> Maybe there's nothing wrong with it running hotter but it makes me
> nervous when that needle edges up toward the red end. Or maybe the 195
> deg thermo wasn't flowing adequately.

I don't recall the spec for the OEM thermostat, but the replacement should
be the same. If the 180 degree thermostat works, then stick with it.

--

Ray O
(correct punctuation to reply)


From: Danny G. on

"HiC" <brassplyer(a)yahoo.com> wrote in message news:c0548257-48ad-4142-9a1c-03aa68e45838(a)a28g2000hsc.googlegroups.com...
> On Nov 18, 11:07 pm, "Ray O" <rokigawaATtristarassociatesDOTcom>
> wrote:
>
>> > I keep reading that they're supposed to be loose when cold, tight when
>> > hot...?
>>
>> You don't have to take my work for how the fan clutch works, check this web
>> site:http://news.carjunky.com/how_stuff_works/car_fan_clutch_what_is_it_c3...
>> or google "engine fan clutch"
>
>
> Oh, I believe you, I just don't see the ones I have behaving that way.
> Either the one that's about a year old or the one I got the other
> night. I'm wondering about whether the Autozone models are decent.
> Torquflo is the brand name cast into the body of the clutch. I assume
> it's some in-house brand, made in China of course.
>
>> Also, make sure you hve the proper coolant mix - too much or too little
>> concentrate can cause overheating.
>
>
> I've been going with the 50/50 stuff, should that be good?
>
> As a follow-up, I found that the thermostat that was in there was 195
> deg. I replaced it with a 180 degree and after running around for
> about 45 mins parked idle, stopped at lights, 80 on the highway and
> various points in between, the temp gauge appears to be back to pretty
> well locked in the center of the normal range as it once was. Once
> warmed up it varied maybe the space between two painted dots on the
> gauge.
>
> Maybe there's nothing wrong with it running hotter but it makes me
> nervous when that needle edges up toward the red end. Or maybe the 195
> deg thermo wasn't flowing adequately.


Glad to hear it was just a bad thermostat.

But do not put off replacing that bottom shroud, belly pan or whatever it is called.
It may not seem important (or even matter) until one hot day on the open highway
when you overheat going up some grade.

What happens is at highway speeds the cooling air flow is not forced thru the radiator and
gets sucked under the car before the radiator without the bottom shroud.


Dan