Radiator Cooling Trouble - Defender Source
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  #1  
Old December 6th, 2003, 12:15 PM
mgrgpg
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Mark
1989 D110
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Radiator Trouble???

Yesterday we had the beginning of a snow storm here on Long Island, and my normal 15 minute commute turned into a 1.5 hour trip. Pretty much idled all the way home, and my water temp gauge was right on the edge of the red zone, for normal travel the needle points straight up. Being that it was about 35 degrees out, I am making an assumption that the radiator is on its way out. Any other opinions?...thanks!
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  #2  
Old December 6th, 2003, 02:33 PM
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Rich Campbell
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I had some overheating issues related to my heater core leaking. I replaced the core and all is well. If your core is leaking you would smell coolant inside and would see some coolant leaking from the box. I don't know if this is your problem but I thought I would mention it.
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  #3  
Old December 6th, 2003, 04:56 PM
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mark another option is your fan clutch isnt kicking in.
when the truck is hot check to see if the fan is spinning freely if it is it may not be doing its job.
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  #4  
Old December 6th, 2003, 05:04 PM
slowpoke496
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mgrgpg,
As Ron said check the fan clutch. I had the same problem this summer. Replaced the viscious fan clutch and fan with a flex-a-lite electric fan and that seemed to do the trick. And yes even in the long commute home yesterday in the snow!

Slowpoke496
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  #5  
Old December 8th, 2003, 11:58 AM
mgrgpg
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Mark
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Thanks for the info...one more item I did not mention, when the car sits in my driveway warming up in the morning, it never seems to get past the normal straight up needle position. What makes driving at 5mph different from standing still, I would guess that driving at any speed would be better.
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  #6  
Old December 10th, 2003, 01:09 PM
mgrgpg
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Mark
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How do you check to see if the fan clutch is operating properly?....With the engine hot, should there be resistance when I try to more the blades?
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  #7  
Old December 10th, 2003, 05:06 PM
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Mark when the truck is hot the fan will have resistence if no resistence then the fan clutch may need to be replaced .
$180 at British Atlantic
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  #8  
Old December 10th, 2003, 07:41 PM
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Bryan
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mark,
I would check it when the engine is totally cold before starting it. then run engine and check it again this way you have something to compare it with. And like Ron said cold little resistance. Hot greater reisitance.

one other thing. do a search in the old BBS area for some good info on this. i will post a the recommendations that i got from Mike H when i started having trouble as soon as i can located them.

Slowpoke496
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  #9  
Old December 11th, 2003, 09:59 AM
mgrgpg
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Mark
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Looks like you guys are right, when the engine is hot I can easily spin the blades, maybe 2 revolutions with a good push. It also seems like when the engine is cool there is a little more resistance.
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  #10  
Old December 13th, 2003, 04:37 PM
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Mike Hammond
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You'll be needing a new Viscous fan unit then!
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  #11  
Old December 13th, 2003, 05:59 PM
slowpoke496
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mark,
Its not a difficult repair. one note the thread on the fan nut is reverse thread.
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  #12  
Old May 11th, 2004, 03:01 PM
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Z
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RADIATOR options

Has anyone had any experience with replacing their D90's radiator with something other than the factory one? I think I'm in need of a new one and was looking for advice.

thanks

Z
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  #13  
Old May 11th, 2004, 03:45 PM
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We went with a 4 core option in ours to help with our overheating issue. Helped greatly.
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  #14  
Old May 11th, 2004, 06:06 PM
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http://www.defendersource.com/mod/cool.html
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  #15  
Old May 11th, 2004, 08:51 PM
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You can ditch the clutch fan for everyday driving?
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  #16  
Old May 11th, 2004, 11:46 PM
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Get the African or MOD spec radiator! It's BIG.
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  #17  
Old May 12th, 2004, 05:57 PM
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Bearmach offers a "4 ROW radiator" is this what you guys are talking about?

http://www.bearmach.com/acatalog/Onl...ooling_13.html
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  #18  
Old May 12th, 2004, 06:26 PM
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Quote:
Get the African or MOD spec radiator! It's BIG.
Uh, not the one that came in my truck. I think you might be a little confused on this one since the MOD's are made for diesels and are smaller than normal for the intercooler. Just go to NAPA, they will custom make you a radiator to YOUR spects for a good price, and..... done.
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  #19  
Old May 12th, 2004, 09:04 PM
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Yousef Hamzeh
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Great topic, just in time. I'm pulling a radiator out of a friend's D90 to have it re cored to a 4 core but they are charging him $500 to do it. Now for that much money is there a better choice or is that great deal?
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  #20  
Old May 12th, 2004, 09:21 PM
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Dave Souza
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I'm getting a 4 row core replaced in my radiator right now, as in, I'm picking it up Friday, and it's costing me $350 complete. That includes the flat-fins option, which adds strength over the standard VT design (see the nice writeup by Q in the FAQ). It also adds $50, so I don't think $500 is a very good deal at all Yousef!

Have your friend get another estimate!
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