Replace fan clutch or go electric - Page 2 - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #21  
Old July 17th, 2015, 11:37 AM
kevincdoyle's Avatar
kevincdoyle
Status: Offline
Kevin C. Doyle
1995 NAS D90 Coniston Green SW
Member
 
Join Date: Nov 2003
Location: Tulsa, OK USA
Posts: 864
Registry
I really hate..

to sound stupid, but don't these NAS D90's have a little electric fan to provide some additional air flow?

You can see it in this picture. (taken before I took off brush bar)
Attached Thumbnails
Click image for larger version

Name:	95def4.jpg
Views:	68
Size:	103.4 KB
ID:	125239  
__________________
Attributed to Shayne...

"I actually like to paint some of my smaller parts......"
Reply With Quote
Sponsored Links
Advertisement
 
  #22  
Old July 17th, 2015, 11:44 AM
Departing90
Status: Offline
Sasha
95 D90
Member
 
Join Date: Dec 2006
Location: Santa Monica, CA. USA
Posts: 401
The twin electric fans in the P38 are designed as pushers to cool the AC condenser. They won't push or pull enough air to cool your radiator. Even in the P38 owners had to upgrade them as they found them inadequate even for cooling the AC condenser. Even if that wasn't the case considering a 15 year old fan from a junk yard as your main cooling setup is playing with fire. Engine cooling is not where you want to save $ by compromising!
Reply With Quote
  #23  
Old July 17th, 2015, 11:45 AM
javelinadave
Status: Offline
-
-
Member
 
Join Date: Sep 2003
Location: -
Posts: 5,394
Quote:
Originally Posted by kevincdoyle View Post
to sound stupid, but don't these NAS D90's have a little electric fan to provide some additional air flow?

You can see it in this picture. (taken before I took off brush bar)
My 97 with A/C had one. It is a last ditch before it overheats fan. It is set to come on at a pretty hot engine temp.
Reply With Quote
Sponsored Links
Advertisement
 
  #24  
Old July 17th, 2015, 01:51 PM
Departing90
Status: Offline
Sasha
95 D90
Member
 
Join Date: Dec 2006
Location: Santa Monica, CA. USA
Posts: 401
If you have the $ an electric water pump is also an option. It'll give you about 4-5◊ GPM more coolant flow at idle, You'll gain about 7HP at 3000RPM, you can have it running when the engines off, wont have to remove the fan clutch when wading and it has a lifespan of around 60K. You may have to upgrade your alternator for the extra power and have an adapter plate made.
Reply With Quote
  #25  
Old July 17th, 2015, 02:12 PM
Overlander's Avatar
Overlander
Status: Offline
mark kellgren
in between D's in an 04 D2
Member
 
Join Date: Mar 2006
Location: Charlotte, NC
Posts: 6,531
Registry
Understanding that an overheat can cause headgasket failure, what do you think is more likely: electrical failure or mechanical failure? your answer to that answers your posting question.
__________________
Mark Kellgren
KM4BOR

ISIL and al qaeda can go F*ck themselves...
Reply With Quote
  #26  
Old July 17th, 2015, 02:13 PM
icnsltmfg's Avatar
icnsltmfg
Status: Online
Adam
1988 D90 RHD 19J
Member
 
Join Date: Jul 2012
Location: North NJ
Posts: 521
Registry
So here is a semi related question....if removed the Viscus fan and added an electric on a 19J...could I then mount a pulley where the fan was for an A/C belt and create some kind of bracket for the compressor?
__________________
America Runs on Dunkin'
Rovers Run on Diesel

2017 Range Rover L405 HSE TD6
2008 Range Rover HSE L322/MkIII - Gone but not forgotten
1988 D90 County RHD 2.5TD
2015 Porsche Cayenne TD
Reply With Quote
  #27  
Old July 17th, 2015, 02:16 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,249
Registry
Quote:
Originally Posted by Overlander View Post
Understanding that an overheat can cause headgasket failure, what do you think is more likely: electrical failure or mechanical failure? your answer to that answers your posting question.
It sounds a simple answer....but.... There is a 100% failure rate on the viscous units from what I've seen. A well executed electric system will be as reliable. How many modern cars overheat due to failed electric fans?

Adding in a high temperature alarm is the best solution to prevent overheating. Very little cost.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #28  
Old July 17th, 2015, 02:22 PM
sonoronos's Avatar
sonoronos
Status: Online
Ed
None
Member
 
Join Date: May 2010
Location: Arlington, VA
Posts: 5,544
Registry
Can an ERC6859 be run on a 19J?

That seems like a cheaper way to have Adam get a pulley to drive a compressor.
Reply With Quote
  #29  
Old July 17th, 2015, 02:26 PM
Overlander's Avatar
Overlander
Status: Offline
mark kellgren
in between D's in an 04 D2
Member
 
Join Date: Mar 2006
Location: Charlotte, NC
Posts: 6,531
Registry
Quote:
Originally Posted by Red90 View Post
It sounds a simple answer....but.... There is a 100% failure rate on the viscous units from what I've seen. A well executed electric system will be as reliable. How many modern cars overheat due to failed electric fans?

Adding in a high temperature alarm is the best solution to prevent overheating. Very little cost.
agree on the temp alarm, unless you are like me and have a vdo gauge staring at you in the face. I don't need no stinkin' alarm.

i think a failed viscous is much easier to identify during routine engine off maintenance inspection than an electric fan failure. And my days of chasing electrical gremlins in the field are over. never going back.
__________________
Mark Kellgren
KM4BOR

ISIL and al qaeda can go F*ck themselves...
Reply With Quote
  #30  
Old July 17th, 2015, 02:31 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,249
Registry
Quote:
Originally Posted by Overlander View Post
And my days of chasing electrical gremlins in the field are over. never going back.
It is all about the implementation quality. When done correctly, you will never have an electrical failure.

An audible alarm is the best. You normally should be looking outside and not at gauges.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #31  
Old July 17th, 2015, 02:47 PM
Overlander's Avatar
Overlander
Status: Offline
mark kellgren
in between D's in an 04 D2
Member
 
Join Date: Mar 2006
Location: Charlotte, NC
Posts: 6,531
Registry
Quote:
Originally Posted by Red90 View Post
An audible alarm is the best.
Ha! This coming from a TDI guy! I recommend this audible alarm model for diesel applications.

__________________
Mark Kellgren
KM4BOR

ISIL and al qaeda can go F*ck themselves...
Reply With Quote
  #32  
Old July 17th, 2015, 02:50 PM
rovertrader's Avatar
rovertrader
Status: Offline
Dale
Tithonus 110, D-90, 109 S/T 5-door
Member
 
Join Date: Jan 2007
Location: Marshville, NC USA
Posts: 4,629
Is that a speaker or a snorkel to route air to cool the rad?!
Cop motor, Cop brakes- must be Cop snorkel!!
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #33  
Old July 17th, 2015, 02:54 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,249
Registry
It is not super loud in my truck. Wind noise is the biggest thing. I have a beeper for both high coolant and high EGT on mine. No problem hearing them.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #34  
Old July 17th, 2015, 03:18 PM
Dogpilot's Avatar
Dogpilot
Status: Offline
James Wallace
Defender 90 1997 NAS ST
Member
 
Join Date: Jan 2014
Location: Flagstaff, AZ
Posts: 311
Registry
When I did my radiator, I replaced the viscous coupling as well, they are in the $40-60 range and they are about the most common part on the entire vehicle with other vehicles of non-Landy make. The only perhaps tricky part is the wrench for holding the viscous coupling shaft. It is thin wrench, but you can borrow it for free from the likes of AutoZone.

As for heat and overheating. Lets see last summer i spent three weeks in the Black Rock desert pulling a 7,000 lb roller with my 97 at 3-5 mph. It never even moved off the center of the cooling gauge, even running AC. If the concept isn't broken, don't change it to a new engineering solution.

Reply With Quote
  #35  
Old July 17th, 2015, 03:21 PM
gilby's Avatar
gilby
Status: Offline
Chris
1994 Defender 90
Member
 
Join Date: Nov 2014
Location: Knoxville, TN, USA
Posts: 61
Registry
Quote:
Originally Posted by Dogpilot View Post
When I did my radiator, I replaced the viscous coupling as well, they are in the $40-60 range and they are about the most common part on the entire vehicle with other vehicles of non-Landy make. The only perhaps tricky part is the wrench for holding the viscous coupling shaft. It is thin wrench, but you can borrow it for free from the likes of AutoZone. As for heat and overheating. Lets see last summer i spent three weeks in the Black Rock desert pulling a 7,000 lb roller with my 97 at 3-5 mph. It never even moved off the center of the cooling gauge, even running AC. If the concept isn't broken, don't change it to a new engineering solution.
Impressive!!
Reply With Quote
  #36  
Old July 17th, 2015, 04:33 PM
Departing90
Status: Offline
Sasha
95 D90
Member
 
Join Date: Dec 2006
Location: Santa Monica, CA. USA
Posts: 401
What a mess ! A high temp alarm is not " the best solution" for preventing overheating! A capable cooling system is on the other hand! You guys do realise that there is a 20 second give or take delay in the actual coolant temp and this alarm! A whole lot of damage can be done in that time! Maybe thats one reason manufacturers also dont agree.
Reply With Quote
  #37  
Old July 17th, 2015, 04:39 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,249
Registry
Obviously you want a good cooling system, but things fail. Viscous units, belts, water pumps, rads plug with mud... Endless amounts of possible reasons one day your engine will overheat. Knowing right away that the temperature is high (before it gets too high), lets you pull over and figure out what has failed. If you rely solely on the gauge, most likely you will miss that chance. Normally it happens while climbing a 5000 foot hard off road trail and the last thing you are doing is looking at gauges.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #38  
Old July 22nd, 2015, 05:48 PM
gilby's Avatar
gilby
Status: Offline
Chris
1994 Defender 90
Member
 
Join Date: Nov 2014
Location: Knoxville, TN, USA
Posts: 61
Registry
Went electric after all. Also found a cracked heater core in the process. Since my blower motor doesn't work, and I've been plenty warm in the winter, I bypassed it. I'll tackle that gremlin later. Needle nary wavers off midline now. Thanks to all!
G
Reply With Quote
  #39  
Old July 23rd, 2015, 04:12 AM
lennix's Avatar
lennix
Status: Offline
Lennie
1993/Defender Tdi200
Member
 
Join Date: Jul 2015
Location: Arusha
Posts: 7
While I believe that if you mainly do fairly light-weight leisure related work with your Land Rover in cool to moderate temperatures, it would be fine with an electric fan, I would personally at least opt for the clutch fan for this kind of vehicle. Considering that it would probably be cheaper for Land Rover to fit an electric fan from the start, Iím assuming that all aspects considered, the clutch fan setup is still seen as the best compromise. Likewise all other heavy duty 4x4ís that I know of employ a similar system despite the reliability of modern electronics. Personally I have a modified arrangement employing a Land Cruiser direct drive fan, which I recond has saved a cracked cylinder-head or two over the years. But I regularly use my Defender for demanding overland work in a hot climate.
Reply With Quote
  #40  
Old July 23rd, 2015, 07:39 AM
ezzzzzzz
Status: Offline
Mark Garrenton
Too many here or gone to list here
Member
 
Join Date: Jun 2004
Location: Portsmouth Virginia
Posts: 758
I ran a 'black magic' electric fan on my '71 IIA with the Chevy 4.3 V6 as there was no room for a mechanical fan. While fording in the creek off Gregory Island at Pearl's Pond I dropped into a rather deep hole. Water came in through the grille. That influx burned up the motor and broke several blades. I was down and out until an overnight replacement came into Charlottesville. If you decide to run electric I highly suggest a dash switch and warning light to cut power to fan for fording. The factory fan and clutch work reliably when in good order. The noise and hp draw aren't that big a deal.
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Injector Replace / Rebuild / Nozzle Replace icnsltmfg Defender Technical Discussions 8 April 29th, 2015 08:29 PM
SPAL 11" Electric Fan and X-Eng X-Fan Kit crown14 For Sale - Parts 2 February 5th, 2010 01:12 PM
Visc. Clutch vs Electric Fan snurp Defender Technical Discussions 27 June 5th, 2008 12:55 PM
Clutch Fan with fan 95 D90 3.9L Vadim For Sale - Parts 2 October 16th, 2004 06:19 AM
D90 -- Fan clutch and fan Vadim Wanted 3 August 1st, 2004 01:00 PM


All times are GMT -5. The time now is 04:19 PM.


Copyright