Viscous Fan

Thunder02 · Post by **Thunder02** » Sat Sep 15, 2012 9:22 am

Has anyone done a change over from a viscous fan to 12volt?Cassie brought up some points,that got me

,water crossing and reliability,anybody got some thoughts

Mr_B · Post by **Mr_B** » Sat Sep 15, 2012 10:41 am

Don't waste your time Niel! The negatives totally outweigh the positives, I tried it, was a total waste of time and effort!

Most guys do this conversion to score a few kW, but remember the direct load of the viscous, gets converted to extra load on alternator with the elec fan!

For a platkar an electrical fan is perfect, for a offroad vehicle viscous wins hands down! Remember those thick glasses japs are very clever, even the modern Vigo 4L V6 still uses a viscous fan. Must be a reason why!

Mr B

Thunder02 · Post by **Thunder02** » Sat Sep 15, 2012 2:13 pm

Mr_B wrote:Don't waste your time Niel! The negatives totally outweigh the positives, I tried it, was a total waste of time and effort!

Most guys do this conversion to score a few kW, but remember the direct load of the viscous, gets converted to extra load on alternator with the elec fan!

For a platkar an electrical fan is perfect, for a offroad vehicle viscous wins hands down! Remember those thick glasses japs are very clever, even the modern Vigo 4L V6 still uses a viscous fan. Must be a reason why!

Mr B

True,but i've been looking at the system in my Rav4,its a '96' model,twin fans with sealed units,still running strong.The Rav has also been used for a lot of offroad driving,did my first bots trip in it about 7 years ago,i guess the system has proved itself.What did you use to put in your vehicle?

Post by **Mud Dog** » Sat Sep 15, 2012 5:27 pm

Do yourself a favour and forget about electric fans ..... too much hassle and more that can go wrong. As B says, factory installation for a platkar, yes! But not for off-road if you're going to overland with it ... you will have a water crossing from time to time and the electric fans are not made for this. The Rav is not a proper off-roader, it's essentially an RV (recreational vehicle).

WESKUSKLONG · Post by **WESKUSKLONG** » Sat Sep 15, 2012 5:32 pm

I was considering electric fans also but what put me off was the noise when it switches on !!!!!

My 2 cents.

BlumTRD · Post by **BlumTRD** » Sat Sep 15, 2012 11:00 pm

No leave the viscouse

Much beter than elct

I even used vicouse on my lexus v8

And prefer the viscouse over the hydraulic pump setup on lexus v8. , by changeging the hydra for a normal idler bracket with viscouse .. I try and convince clients but hey each to his own .

Regards

David

Sent from my BlackBerry

Thunder02 · Post by **Thunder02** » Sun Sep 16, 2012 11:05 am

[quote="BlumTRD"]No leave the viscouse

Much beter than elct

I even used vicouse on my lexus v8

And prefer the viscouse over the hydraulic pump setup on lexus v8. , by changeging the hydra for a normal idler bracket with viscouse .. I try and convince clients but hey each to his own .

Regards

David

Ok,so i'm looking at it from the wrong side,need to change to a V8 and leave the fan

Post by **Mud Dog** » Sun Sep 16, 2012 1:59 pm

Ok, so i'm looking at it from the wrong side,need to change to a V8 and leave the fan

Nah, My 2Y (1800cc) work bakkie drives that fan and carries a load .... maybe you should be looking at what's wrong with your 2.7!

Thunder02 · Post by **Thunder02** » Sun Sep 16, 2012 3:18 pm

Mud Dog wrote:
Ok, so i'm looking at it from the wrong side,need to change to a V8 and leave the fan
Nah, My 2Y (1800cc) work bakkie drives that fan and carries a load .... maybe you should be looking at what's wrong with your 2.7!

No problem with 2.7,fan needs to be replaced

Post by **Mud Dog** » Sun Sep 16, 2012 4:57 pm

Why replace? Is it damaged? Otherwise just replace / top up the silicon gel inside.

BlumTRD · Post by **BlumTRD** » Mon Sep 17, 2012 9:31 am

Thunder02 wrote:
BlumTRD wrote:No leave the viscouse

Much beter than elct

I even used vicouse on my lexus v8

And prefer the viscouse over the hydraulic pump setup on lexus v8. , by changeging the hydra for a normal idler bracket with viscouse .. I try and convince clients but hey each to his own .

Regards

David

Ok,so i'm looking at it from the wrong side,need to change to a V8 and leave the fan

Yip The fan takes 49Kw from the 108Kw on 2.7

Thunder02 · Post by **Thunder02** » Mon Sep 17, 2012 8:54 pm

Mud Dog wrote:Why replace? Is it damaged? Otherwise just replace / top up the silicon gel inside.

Ok,so i'm guessing the unit can be serviced.Thought it was a sealed unit.

Post by **CasKru** » Mon Sep 17, 2012 8:56 pm

Thunder02 wrote:
Mud Dog wrote:Why replace? Is it damaged? Otherwise just replace / top up the silicon gel inside.
Ok,so i'm guessing the unit can be serviced.Thought it was a sealed unit.

Yes it can... replaced the oil in mine. Still have a spare tube of oil left.

Post by **Mud Dog** » Mon Sep 17, 2012 8:58 pm

Can be serviced ...... you can get the OEM silicon gel / oil from Toyota.

Thunder02 · Post by **Thunder02** » Mon Sep 17, 2012 9:00 pm

CasKru wrote:
Thunder02 wrote:
Mud Dog wrote:Why replace? Is it damaged? Otherwise just replace / top up the silicon gel inside.
Ok,so i'm guessing the unit can be serviced.Thought it was a sealed unit.
Yes it can... replaced the oil in mine. Still have a spare tube of oil left.

Cassie,is there any bearings inside the unit,or are there only oil seals

Need to strip the fan this weekend,sounds if it want's to seaze up.

Post by **CasKru** » Mon Sep 17, 2012 9:52 pm

No bearings I could see....

Post by **CasKru** » Mon Sep 17, 2012 9:54 pm

Have a look at this topic... viewtopic.php?p=82600#p82600" onclick="window.open(this.href);return false;

Thunder02 · Post by **Thunder02** » Mon Sep 17, 2012 10:00 pm

thanks

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