Removing a clutch fan/benefits!

Submitted: Monday, Apr 24, 2006 at 20:07

ThreadID: 33203 Views:4028 Replies:5 FollowUps:4

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TUFF IFS LUX

G'day all,

Could I please ask for advice on the benefits of removing the engine driven clutch fan and installing a Craog/Davies thermo-fan.

I want to remove the fan off my Hilux V6 as I beleive it drains alot of power off my engine and I would benefit from not only increase fuel economy but it'd run alot quieter too.

Has anybody done this or a similar mod and could you please let me know of the benefits you received from doing it. Should I go ahead with it?

All comments greatly appreciated,

TUFF IFS LUX (aka Max)

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Reply By: Member - JohnR (Vic)&Moses - Monday, Apr 24, 2006 at 21:25

Reply By: Stuart - Monday, Apr 24, 2006 at 21:37

Monday, Apr 24, 2006 at 21:37

Hi Max, I wouldn't do it. You should only hear your fan on initial start up or when the engine gets hot. If you can hear it all the time then something is wrong with the hub. These type of fans won't spin past about 2500rpm and then the hub will just free wheel or slip so it's not like it will try to spin to 5000 rpm. I've been involved in a lot of V8 cruiser conversions and most of the one's with over heating problems have gained a lot of additional cooling when thermos have been replaced with a clutch fan. The thermos just don't seem to be able to pull the air that a properly shrouded clutch fan can. That's been my experience anyway.
Cheers.

AnswerID: 168790

Follow Up By: Marn - Tuesday, Apr 25, 2006 at 05:19

Tuesday, Apr 25, 2006 at 05:19

My friend put a 5.0 injected holden motor in his 75 series ute and could not keep it cool. The eventual fix was to remove the 2 thermos and put the clutch fan back on. No problems since. I would be inclined to leave the lux as is.

Gerard

FollowupID: 424183

Follow Up By: Member - Stephen M (NSW) - Tuesday, Apr 25, 2006 at 15:41

Tuesday, Apr 25, 2006 at 15:41

Hi there Stuart, would that mean I have something wrong with mine?? as if I'm pulling up a hill with say air con on and temp starts to climb to halfway which is only a mil or to from where it runs at normal operating temperature I can hear my fan start to cut in sounds like a jet winding up then the gauge drops down to where it was and you can hear the fan fade back out again, isnt this the way they are suppose to work, myn has the little spring at the front of it which is supposidly to detect the heat from the radiator so it then locks up the fan to pull air through. This is still the original clutch fan on mine and vehicle has done 280klm and never climbs above half even with air on in a 40c day. Regards Steve M

FollowupID: 424258

Follow Up By: Stuart - Tuesday, Apr 25, 2006 at 18:41

Tuesday, Apr 25, 2006 at 18:41

Hi Max, I know exactly what your talking about as the fan in my Cruiser was doing the same thing. Just cruising down the highway I could hear the fan cycling in and out, most annoying and it shouldn't do that. I got another hub off a V6 Toyota or Nissan (amazing how interchangable some parts are) and it had a thicker spring on it. That fixed the problem and I only hear the fan on start up or if the gauge hits 3/4. It has only ever got that warm 3 times in 4 years and that's with having a 350 Chev under the bonnet. I would concider replacing your hub. I think the spring gets weak after a few years. That's my opinion anyway. CHeers Stuart.