LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

So im gonna replace the Mechanical Engine Fan with an Electric Fan. 1 question

Thread Tools
 
Search this Thread
 
Old 01-17-11, 03:04 PM
  #1  
bagyo
Driver
Thread Starter
 
bagyo's Avatar
 
Join Date: Apr 2009
Location: ca
Posts: 108
Likes: 0
Received 0 Likes on 0 Posts
Default So im gonna replace the Mechanical Engine Fan with an Electric Fan. 1 question

Thanks to you kind people here in CL, i've found out that that Big Fan MACK Truck Noise in my hood was a broke Fan clutch. So now i will be attempting to do the electric fan conversion because it seems easy enough to do, cheaper than buying and OEM fan clutch and will free up some HP on my 92 LS400 barge. LoL

So since i'm going to just tap the positive fan wire to the ignition wire under the fuse box as stated in the tutorial section on LexLS.com; My question is will the fan come on automatically and turn itself off as needed depending on my engine temperature??????? i really want to do this mod already because i hate the noise, but i want to make sure that it will work before i commute to work or drive it somewhere far and end up overheating somewhere. Thanks in advance CL people
Old 01-17-11, 09:16 PM
  #2  
PureDrifter
BahHumBug

iTrader: (10)
 
PureDrifter's Avatar
 
Join Date: Aug 2004
Location: California
Posts: 23,918
Received 94 Likes on 86 Posts
Default

before you do the fan clutch, did you try to refill the clutch with the silicone fluid it needs to work?
Old 01-18-11, 04:49 AM
  #3  
sdls
Lexus Champion
 
sdls's Avatar
 
Join Date: Sep 2010
Location: NA
Posts: 2,218
Received 293 Likes on 241 Posts
Default

Originally Posted by PureDrifter
before you do the fan clutch, did you try to refill the clutch with the silicone fluid it needs to work?
most people don't have the knowledge, skills or abilities to do that.
Old 01-18-11, 10:37 AM
  #4  
bagyo
Driver
Thread Starter
 
bagyo's Avatar
 
Join Date: Apr 2009
Location: ca
Posts: 108
Likes: 0
Received 0 Likes on 0 Posts
Default

Yeah i'm familiar with doing regular maintenance and some intermediate mechanic work but i only fix things as they go bad so this would be my first experience with a broken fan clutch. i really just want to do the conversion but i guess i can give filling the fan clutch with silicone fluid a try if it's easy enough, but if its more involved than slapping on an electric fan than i think i'd rather do the swap. Help someone! i just want to know, will the electric fan conversion come on automatically and turn itself off as needed depending on my engine temperature?????? I'm so annoyed by the sound of my car right now! LoL it sounds like a cross between a semi-truck and a big airplane Hahaha
Old 01-18-11, 11:03 AM
  #5  
Ursus
Rookie
 
Ursus's Avatar
 
Join Date: Mar 2008
Location: NY
Posts: 99
Likes: 0
Received 0 Likes on 0 Posts
Default

If you add a temperature switch to the circuit it will. make sure it touches both the radiator and ac condenser. or you can add one with an adapter to the coolant hose.
Old 01-18-11, 05:11 PM
  #6  
Yotarip
Driver
 
Yotarip's Avatar
 
Join Date: Mar 2009
Location: va
Posts: 158
Likes: 0
Received 3 Likes on 3 Posts
Default

I would highly recommend that you power the fan thru a high amp relay. The electric fans pull alot of amps. It may overheat the ignition wires if you tap directly into them.
Old 01-19-11, 09:32 PM
  #7  
Bali26
Pole Position
 
Bali26's Avatar
 
Join Date: Sep 2007
Location: BC Canada
Posts: 251
Likes: 0
Received 2 Likes on 2 Posts
Default

Just replace the fan clutch, problem solved.
Old 01-19-11, 11:13 PM
  #8  
Sololock
Driver School Candidate
 
Sololock's Avatar
 
Join Date: Dec 2010
Location: Ca
Posts: 22
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Yotarip
I would highly recommend that you power the fan thru a high amp relay. The electric fans pull alot of amps. It may overheat the ignition wires if you tap directly into them.
im pretty sure you can also wire it to the fan relays. does the same as if it was wired to a temp sensor.
Old 01-20-11, 10:47 AM
  #9  
PureDrifter
BahHumBug

iTrader: (10)
 
PureDrifter's Avatar
 
Join Date: Aug 2004
Location: California
Posts: 23,918
Received 94 Likes on 86 Posts
Default

Originally Posted by sdls
most people don't have the knowledge, skills or abilities to do that.
i make the contention that if you can't replace or R&R the fan clutch, you dont have the knowledge, skills, or abilities to properly select, install, and wire (with a redundancy in case the temp switch fails) an aftermarket electric fan.
Old 01-20-11, 12:56 PM
  #10  
Marklouis
Lexus Champion
 
Marklouis's Avatar
 
Join Date: Jul 2010
Location: al
Posts: 1,781
Received 7 Likes on 6 Posts
Default

How much HP can you really gain from switching clutch to electric? 2.5 - 3 HP maybe?
Old 01-20-11, 03:56 PM
  #11  
PureDrifter
BahHumBug

iTrader: (10)
 
PureDrifter's Avatar
 
Join Date: Aug 2004
Location: California
Posts: 23,918
Received 94 Likes on 86 Posts
Default

less imho.
Old 01-20-11, 07:32 PM
  #12  
Coulter
Intermediate
 
Coulter's Avatar
 
Join Date: Jul 2010
Location: CT
Posts: 348
Received 22 Likes on 18 Posts
Default

I'd recommend sticking with the clutch fan, I really see no upside to converting to an electric fan set up. They usually don't pull as much air (causing cooling problems), will wear out your alternator and battery quicker from all the juice they require, and cost more money. To get an electric fan that can pull what stock clutch fan can, you usually have to spend big bucks, the "Pep Boys" type generic fans won't cut it. In my experience, electric fans are also A LOT more noisy.

To get a quality electric fan that can pull as much as a clutch and with all the accessories, you looking at around $300. An aftermarket clutch for your fan is around $50, and it will also be much easier to install.

http://www.oreillyauto.com/site/c/de...3389&ppt=C0331
Old 01-20-11, 10:14 PM
  #13  
MrFuel
Pole Position
iTrader: (3)
 
MrFuel's Avatar
 
Join Date: Dec 2009
Location: Ca
Posts: 350
Received 23 Likes on 10 Posts
Default

I would recommend getting another clutch fan. I just replaced mine for 20 bucks.
Old 01-21-11, 06:18 AM
  #14  
Marklouis
Lexus Champion
 
Marklouis's Avatar
 
Join Date: Jul 2010
Location: al
Posts: 1,781
Received 7 Likes on 6 Posts
Default

Originally Posted by PureDrifter
less imho.
probably .5 HP - 1.25 HP then. lol
Old 01-21-11, 12:20 PM
  #15  
bagyo
Driver
Thread Starter
 
bagyo's Avatar
 
Join Date: Apr 2009
Location: ca
Posts: 108
Likes: 0
Received 0 Likes on 0 Posts
Default

LoL ok you guys convinced me. i guess i'll just be replacing the fan clutch then. Thanks for yur 2cents eerbody Who needs a Haynes when you got CL


Quick Reply: So im gonna replace the Mechanical Engine Fan with an Electric Fan. 1 question



All times are GMT -7. The time now is 06:51 AM.