Altima fans install!

[Wykid 240]

slgithy confused..

few questions

whats the a/c plug and stuff for...what temp does the stock mech fan coem on atwhat temp does the mech fan shut off atwhat temp does the altima fans shut off at, and do u set this or what..should you set the fans to come on at the same temp as your thermostat (ie 180* thermostat so fans come on at 180*)

also could u wire in 2 thermo switchs one for low speed and one for highspeed (set at like 230* incease you start to overheat while drifitng or something...)

thanks alot

Ok man, you need to read the whole post. The awnsers to you questions are in it. The one that's not, Your mech fan is belt drivin. It works off of engine speed. So, this that said it doesn't turn on/off like an elec fan.

-Jeramy

[babowc]

im a bit confused..what did you do with the AC fan wires again?

i left them bare.. but maybe thats why my (taurus) fans are staying on after i shut off the car..?

sorry for the confusion.. i cant thank you enough for that part for the ps and all this help!

[kimbote]

Jeramy,

Hi thanks for the write up. Because of your thread, I was able to do this upgrade myself. I have one problem though. I used the exact same thermostat that you used. Everything worked great the first time which was most thrilling. But I went to start the car this morning and the battery was completely dead. I'm wondering if you had similar problems. I wired the thermostat just like you did with the fuse inline to the unit and out to the fan. I'm not sure why this happened since the fan only turns on when the thermostat reads a high temp. The last couple times I used the car, the fans came on and I had power but now no battery. Do you have any ideas?

thanks,Mike

[lofapoo]

I can't wait to get rid of this stock fan and shroud bull****.

Awesome write up! Looking forward to the oil catch-can aswell

[Kenrik]

Hey I hooked up the Yellow wires to power and the black and green to ground and the fans PUSH... that's not good they need to pull any ideas??? what do I need to change to make them pull like they should?

[lrb_2000]

Hey I hooked up the Yellow wires to power and the black and green to ground and the fans PUSH... that's not good they need to pull any ideas??? what do I need to change to make them pull like they should?

They push through the radiator towards the front bumper?

[TheOne]

yeah, same happens to mine, i believe i have to change the polarity of'em(as in, change the ground to be power and power to be ground)

[Kenrik]

They push through the radiator towards the front bumper?

Yup... Ya'll are giving false information... I'm thinking it's opposite of what was posted.. Anyone ??

[Kenrik]

Bump... I need to know what the real wires are... because I have yellow hooked upto power and the green and black wires spliced together and hooked up to ground but the fans PUSH (out the front of the car) insted of PULL... Anyone?

Oh yeah BTW you can get Altima fans brand new for $90 shipped off ebay.

[jr_ss]

Bump... I need to know what the real wires are... because I have yellow hooked upto power and the green and black wires spliced together and hooked up to ground but the fans PUSH (out the front of the car) insted of PULL... Anyone?

Oh yeah BTW you can get Altima fans brand new for $90 shipped off ebay.

I would say switch it and make the blue positive and the yellow and black negative. It's just a matter of 3 wires and finding the right combo. You can't hurt anything you have a fused wired in parallel right?

[TheOne]

Bump... I need to know what the real wires are... because I have yellow hooked upto power and the green and black wires spliced together and hooked up to ground but the fans PUSH (out the front of the car) insted of PULL... Anyone?

Oh yeah BTW you can get Altima fans brand new for $90 shipped off ebay.

i would think that now that your fans work, and probably in high-speed, just switch the polarity(ie switch the ground to be power and power to be ground), at least thats what am gonna do as mine are also pushing and not pulling.

[matt4pl]

nice write up. i did the same on my S14 (there's a write-up on it too), just used the stock system to tunr htem on/off, etc. its so much nicer then the stock pile of plastic

[woots]

You can get New aftermarket altima fan assys. on ebay for about $100.00 delivered to your door and at the local auto parts store.

[TheOne]

ok, what i've found out is that yes, you do have to switch the wires for the fans to be pullers.

my fan wiring goes as this

blue/black to pos, yellow to neg = puller on high speed

this is all wired to a switch so that i can turn'em on and off

[rn240sx]

i pulled this from Zilvia.net

+12v blue, (-12v black & -12v green) == low speed

+12v yellow, (-12v black & -12v green) == high speed

(+12v blue & +12v yellow), (-12v black & -12v green) == fans don't spin at all!

That wiring is different there. On my S14's stock electric fan, its also dual speed but the wiring is different..

The yellow and black are both grounds. Blue and green are both 12v each... When either the blue OR green is applied to 12v, it goes into low speed. When BOTH wires are applied to 12V, it goes into HIGH speed.

Im curious to know how much cfm's those altima fans push....

[DJButton]

The Altima fans were rated at pushing just over what the FALS do on a flow chart, I don't remember how many CFM's that is though.

I just finished wiring up the fans on my car and placed the fans on the front under the rad. support cause they wouldn't fit anywhere else. Buy anyhow, the yellow wire on each I used for a ground (because I needed to reverse the polarity) and the green wire I used for a power (again reveresed polarity) The other wires were just cut and shrinkwrapped.

So for high speed, (and I did just wire it a short while ago)"]Yellow = PowerGreen = Ground Black = Do not useBlue = Do not useNot it could be different with stock fans and replacment ebay ones like I have but there you have it none-the-less it should be the same!

[rn240sx]

Either fan i choose whether its the FAL's again or buying the altima fans, i have to do some trimming cause none of them will fit over the radiator like i want them to fit. Im not gonna mount the fans to the upper and lower tanks, im gonna mount the fans direct to the metal fins. Oh well, but thanks for ur info there, very helpful..

[rn240sx]

Test fit:-Jeramy

Well, according to that picture it looks like the altima fan bolts right up to the 240 factory radiator... at least the upper channel side, not sure about the bottom side tabs if they drop into place where the stock 240 elec fan drops into...Now people are stating that these are not a bolt up to the 240 radiator... but from the looks of that picture they do... unless im seeing it wrong or missing something.....

[Kenny_D]

I have that thermostatic switch, but I put it up against the end of the radiator near the battery and sealed it in with high temp RTV to keep the reading more accurate to coolant temp and not the temp of the air coming through the radiator.

http://gallery.pethobbyist.com...e=big

I also put the thermostat power on a 12V relay switch connected to the fuel pump fuse. This way the fan/s only have power when the ignition is on. It looks like you could kill your battery with the fans staying on after you turn the car off since the temp won't go down for a little while after.

http://gallery.pethobbyist.com...e=big

Diagram:http://gallery.pethobbyist.com...99744

All of it was done for about 50$ total. HKS Fan Controller be damned!

[JdrifterCA]

very nice write up and alots question answered as i read the posts. maybe i might have missed it, but do u have any problem with overheating after switching to altima fans? i live in the desert and it gets pretty darn hot in here. would switching to the altima fans cause overheating problems or is it better than my stock belt driven fans?

[bruinbear714]

I have that thermostatic switch, but I put it up against the end of the radiator near the battery and sealed it in with high temp RTV to keep the reading more accurate to coolant temp and not the temp of the air coming through the radiator.

http://gallery.pethobbyist.com...e=big

I also put the thermostat power on a 12V relay switch connected to the fuel pump fuse. This way the fan/s only have power when the ignition is on. It looks like you could kill your battery with the fans staying on after you turn the car off since the temp won't go down for a little while after.

http://gallery.pethobbyist.com...e=big

Diagram:http://gallery.pethobbyist.com...99744

All of it was done for about 50$ total. HKS Fan Controller be damned!

Running the fans off a relay hooked up to the fuel pump / ignition switch / any kind of on/off switch is almost the worse way to hook up electric fans. The worse way is to hook up the fans directly.

Using a probe into the radiator is a little better, but will eventually fall out or get loose, causing fan turn on issues.

Best thing is an electronic fan controller, like the DIF Fan Controller with built in relays.

http://www.frsport.com/DIF_Dua....html

You can also get greddy or hks but none of those have relays so you have to get your own and wiring is a little more messy.

[ddgsxr504]

I see that he hooked the thermo switch up to the back of the radiator but is there a thermo switch that can be run to read actual coolant temp?

[rn240sx]

Diagram:http://gallery.pethobbyist.com...99744

I would take that fan's POWER line OFF that thermostat. What u have their is the fan pulling all that current THRU the thermostat. Im not sure how much current that thermostat can handle but i would not chance it. I would use the thermostat as the GROUND trigger for the relay. So one side of that therm will connect to ground and the other side of that therm will go to the ground side of the relay... SO, when the therm trips, it will provide ground path for the relay for it to click on... Im sure u can see it mentally but if not, i can draw it out.. I just wouldnt trust that therm to hold ~15 amps of current...

[rn240sx]

Running the fans off a relay hooked up to the fuel pump / ignition switch / any kind of on/off switch is almost the worse way to hook up electric fans.

Why is that..?? The only thing i didnt agree with on his setup is that he wired up the fans to draw current ( ~15 amps) THRU the thermostat which is think is a major no no..!! I would never trust a therm to pass and HOLD ~15 amps....

Quote »The worse way is to hook up the fans directly.[/quote]ok... why is that..??

Quote »Using a probe into the radiator is a little better, but will eventually fall out or get loose, causing fan turn on issues.[/quote]i agree with it inside the core is a bit better, but if its secured WELL from front to back, it wont come out.

Quote »Best thing is an electronic fan controller, like the DIF Fan Controller with built in relays.[/quote]I personally wouldnt say its the best, but many do the usual 12V relay with adj therm and it works just as good as that controller... for a fraction of the cost.

[amolao]

For reference purposes.....

zer...73035

[ChrisEspo83]

i need to know what color wire you used to hook up the fan because i see that the altima fan come wit 4 wires in each plug and there are 2 plugs. so which wires did u hook up . like which color is power which color is ground and which color is high and low.. please let me know asap..

thankyouchris

[bware113]

I did this on my S14 did it a little different, but definitely an awesome write-up. Great Job