Whilst doing some research, I came across these threads:
https://neuralfibre.com/paul/2009/03/31 ... an-clutch/
And then how to fill the viscous:
http://offroad80s.com/how-to-top-up-you ... t1160.html
And to make the heat guage more sensitive:
http://www.toyotasurf.asn.au/techsite/tempgauge.htm
Happy reading!
Tuning and understanding your Toyota viscous fan clutch
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Thabogrobler
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Tuning and understanding your Toyota viscous fan clutch
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Mud Dog
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Re: Tuning and understanding your Toyota viscous fan clutch
Thanks Thabo. Interesting reads and some new understanding gained IRO the valve adjustments. 
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Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
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Bear
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Re: Tuning and understanding your Toyota viscous fan clutch
A great read up, thanks.
Now the question, does the SFA have a similar problem?
I started searching on the SFA and I found old posts with the same problems but no solutions. Is it advisable to change the SFA’s gauge to a digital one?
Where are all the Fundi’s ?
Now the question, does the SFA have a similar problem?
I started searching on the SFA and I found old posts with the same problems but no solutions. Is it advisable to change the SFA’s gauge to a digital one?
Where are all the Fundi’s ?
Travel is not really about leaving our homes, but leaving our habits.
Adventure tends to magnify all human emotions.
It's only in adventure that some people succeed in knowing themselves - in finding themselves.
Adventure tends to magnify all human emotions.
It's only in adventure that some people succeed in knowing themselves - in finding themselves.
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Mud Dog
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Re: Tuning and understanding your Toyota viscous fan clutch
The SFA visco fan can have a similar problem ( I think they changed from a solid to visco somewhere around '91 / '92). There is a write-up here about changing / topping up the silicone oil.
IRO the temp gauge, it also has that "flat spot" but personally I would leave it the way it is.
IRO the temp gauge, it also has that "flat spot" but personally I would leave it the way it is.
When your road comes to an end ...... you need a HILUX!.
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
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KZTE Nut
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Re: Tuning and understanding your Toyota viscous fan clutch
Very interesting Thabo.
Do you think that temperature gauge mod would work on your KZ hilux ?
Do you think that temperature gauge mod would work on your KZ hilux ?
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Thabogrobler
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Re: Tuning and understanding your Toyota viscous fan clutch
I'm sure it would.
'02 KZ 'Lux. Cooled. Chipped. Onca'd. Cherished!
If you are a diesel fan, raise your hand.
If you aren't raising your hand, raise your standards!
A 4x4 is merely a machine that enables you to get stuck further away from civilization.
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A 4x4 is merely a machine that enables you to get stuck further away from civilization.
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Thabogrobler
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Re: Tuning and understanding your Toyota viscous fan clutch
For the silicone oil used in the viscous unit: You don't have to buy the expensive stuff at Toyota.
Visit your local hobby shop, the R/c cars use the same oil in their shock absorbers. Just look fir the correct CST. Will cost around 1/10th of the price Toyota charges.
Visit your local hobby shop, the R/c cars use the same oil in their shock absorbers. Just look fir the correct CST. Will cost around 1/10th of the price Toyota charges.
'02 KZ 'Lux. Cooled. Chipped. Onca'd. Cherished!
If you are a diesel fan, raise your hand.
If you aren't raising your hand, raise your standards!
A 4x4 is merely a machine that enables you to get stuck further away from civilization.
If you are a diesel fan, raise your hand.
If you aren't raising your hand, raise your standards!
A 4x4 is merely a machine that enables you to get stuck further away from civilization.
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Poffie
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Re: Tuning and understanding your Toyota viscous fan clutch
Hi guys I am new to the forum. I have had plenty of problems with viscous fans. Especially when towing,boosting, or sand driving. I have learned a trick from a old timer. I use Wyns charge for oil and had very good success with it. The fan will definitely have more resistance that might impact your fuel economy slightly but it definitely works.