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  #41  
Old June 17th, 2014, 01:48 PM
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Originally Posted by leastonce View Post
Any 'heavy duty fan sucks ... it basically runs all the time ... even when not needed, are noisy and destroys your gas mileage. We've all thrown these in the trash.

Now using a RRC fan clutch and 11 blade fan does seem to be a decent upgrade ... the fan fits the shroud much better and generates better air flow.

That being said ... if your fan is kicking in you probably have other issues as i've discovered when the cooling system is working well ... you don't need much activity from the fan.
That's what I had gathered from this thread. I definitely have a cooling system issue, but I'm hoping to band-aide it for the summer. Unless there is an issue with my water pump, which has been replaced at some point, I'm guessing its the head gasket or a cracked block. Its only overheating when in traffic at temps over 90F for over 20 min with the a/c on. Brand new genuine radiator and thermostat. This truck has a Bosch block with 20 bolt heads. My fan clutch is locking up and the condenser fan is working and wired correctly to push air. I've monitored the temp through the fuel injection ECU to ensure proper gauge operation. I haven't had it get to boiling over hot, but I've gotten it up to 225F in traffic.
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  #42  
Old June 17th, 2014, 01:57 PM
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Originally Posted by Jymmiejamz View Post
That's what I had gathered from this thread. I definitely have a cooling system issue, but I'm hoping to band-aide it for the summer. Unless there is an issue with my water pump, which has been replaced at some point, I'm guessing its the head gasket or a cracked block. Its only overheating when in traffic at temps over 90F for over 20 min with the a/c on. Brand new genuine radiator and thermostat. This truck has a Bosch block with 20 bolt heads. My fan clutch is locking up and the condenser fan is working and wired correctly to push air. I've monitored the temp through the fuel injection ECU to ensure proper gauge operation. I haven't had it get to boiling over hot, but I've gotten it up to 225F in traffic.
got good pressure? ... there was a batch of faulty genuine expansion bottle caps doing the rounds ...
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  #43  
Old June 17th, 2014, 02:08 PM
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SO are you running the Classic fan? I may have a photo comparing a stock D90 fan to the RRC fan, major difference. I believe the stock D90 fan is that same fan used to the 4 cyl petrol trucks...
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  #44  
Old June 17th, 2014, 02:21 PM
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Originally Posted by leastonce View Post
got good pressure? ... there was a batch of faulty genuine expansion bottle caps doing the rounds ...
Mine is an aftermarket replacement that was on the truck when I got it. I tested it with my pressure tester and it holds pressure. I also just yesterday swapped mine with a low mileage factory known good Genuine cap that I also pressure tested.
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  #45  
Old June 17th, 2014, 03:20 PM
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Mine is an aftermarket replacement that was on the truck when I got it. I tested it with my pressure tester and it holds pressure. I also just yesterday swapped mine with a low mileage factory known good Genuine cap that I also pressure tested.
how to you pressure test a cap?

I can test the system but the cap is taken off to do the test????
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  #46  
Old June 17th, 2014, 03:30 PM
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Quote:
Originally Posted by leastonce View Post
how to you pressure test a cap? I can test the system but the cap is taken off to do the test????
STS pressure tested my truck and they had a cap that screws on with an air hose coming out.
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  #47  
Old June 17th, 2014, 04:39 PM
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Quote:
Originally Posted by leastonce View Post
how to you pressure test a cap?

I can test the system but the cap is taken off to do the test????


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  #48  
Old June 17th, 2014, 05:08 PM
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We noticed that the other day. Its pretty trashed and going to be replaced.
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  #49  
Old June 17th, 2014, 05:31 PM
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Originally Posted by Jymmiejamz View Post

Snap-on literally sold you one of everything, didn't they.
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I am talking purely from an aesthetics standpoint.
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  #50  
Old June 17th, 2014, 05:40 PM
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Snap-on literally sold you one of everything, didn't they.
Pretty much... I actually bought my tool box full of tools. I've since bought many other tools, but it was pretty complete to begin with. The pressure tester is from 1991. I was was born in '88.
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  #51  
Old June 17th, 2014, 05:49 PM
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I can't wait for all of your tools to be up here...
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  #52  
Old May 29th, 2015, 10:02 AM
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TTT does anyone have a photo comparison of the stock NAS 3.9 fan vs the RRC V-belt fan?
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  #53  
Old May 29th, 2015, 07:43 PM
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Originally Posted by rover4x4 View Post
TTT does anyone have a photo comparison of the stock NAS 3.9 fan vs the RRC V-belt fan?
No, but FYI I know of two Atlantic British RRC fans that have exploded when fitted to a Defender. One took out a hood, shroud, and radiator. The other one just took out the shroud. I'm still running mine.
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  #54  
Old May 29th, 2015, 08:04 PM
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Two different designs depending on whether you have a multi belt v serpentine. Serpentine is further on to the drivers side than the multi belt set up.
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  #55  
Old August 16th, 2015, 07:33 PM
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My RRC fan exploded last night in Manhattan. Luckily it only took out the shroud and bent a few fins in the radiator. The fan came from Atlantic British, but I can't really put the blame on them with it being the wrong application.
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  #56  
Old August 16th, 2015, 07:53 PM
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Wrong application??

How so?

Is your 90 motor turning @ 9000 rpm?

How is the application that wrong?

FWIW, my original 1991 3.9 RRC fan exploded in 2008. Luckily it only took out a small section of a radiator row and ate the shrowd going out the bottom.



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  #57  
Old August 16th, 2015, 08:52 PM
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i need to check both of my fans i ordered a fan from AB once years ago and it was so shitty i sent it back i hate to think how many miles are on the fan sitting in front of my new radiator shhh....
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  #58  
Old August 16th, 2015, 09:16 PM
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Quote:
Originally Posted by Nomar View Post
Wrong application??

How so?

Is your 90 motor turning @ 9000 rpm?

How is the application that wrong?

FWIW, my original 1991 3.9 RRC fan exploded in 2008. Luckily it only took out a small section of a radiator row and ate the shrowd going out the bottom.



.
They don't fit perfectly with the Defender fan shroud. You have to space up the shroud and under certain instances the fan can rub the shroud which, in my opinion, will lead to premature failure.
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  #59  
Old August 17th, 2015, 02:55 PM
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Originally Posted by Jymmiejamz View Post
They don't fit perfectly with the Defender fan shroud. You have to space up the shroud and under certain instances the fan can rub the shroud which, in my opinion, will lead to premature failure.
Personally I think they are shit quality and am looking for a metal replacement. Numerous ones have failed and apparently not all in defenders.
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  #60  
Old August 17th, 2015, 02:58 PM
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Quote:
Originally Posted by Jymmiejamz View Post
They don't fit perfectly with the Defender fan shroud. You have to space up the shroud and under certain instances the fan can rub the shroud which, in my opinion, will lead to premature failure.
I put those springy washers under the shroud and dont have any issues with the fit now. I agree it is a tight fit but it is a huge improvement over the stock fan. Someone over on Discoweb found a metal fan at NAPA for his RRC. There are a zillion fans at Summit or Jegs take your pick and let us know which one works
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