Yes, It's another overheating/Fan clutch question - Defender Source
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  #1  
Old September 3rd, 2009, 10:46 PM
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Brian
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Yes, It's another overheating/Fan clutch question

94' is overheating with AC on at slow speeds (I'm at Texas gulf coast and it's always hot). It's fine w/o AC on. My question may be a dumb one, but can I remove the fan clutch so that the fan runs at constant speed? Why in the world would I want a clutch slowing/stopping my fan in this ridiculous heat?

Have recored the radiator to original specs and replaced Tstat and ran fine but that was before I got the AC fixed. Now, the temp creeps up in slow driving w/ ac on. I don't want to rehash all the previous overheating posts... just wanted know about the necessity of the fan clutch.

One more thing, has anyone here simply replaced the fan with positive results. When I was in HS I replaced the fan on my Oldsmobile with a Flex Fan... not because I was overheating but because it was loud and I thought it sounded cool. Might that improve cooling a bit or not enough to make a diff?

One more...one more thing, I don't have VDO temp guage, just stock. If needle is right down the middle what is the aprox. temp at that point.
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  #2  
Old September 4th, 2009, 08:11 AM
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Charles Galpin
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I once replaced my stock fan clutch with a flex fan. Worked great but was actually masking other problems I believe (in other words not solving the root problem). I went back to stock once my engine was repaired (well replaced with a rebuild) because they were too loud for my liking and were yet another electrical component to have to worry about.

I can't recall the model number but search here for flexalite to see threads on the swap. 210 iirc.

hth
charles
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  #3  
Old September 4th, 2009, 08:46 AM
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Jim Cheney
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I've got a pair of flex-a-lites I'm not going to use. If you want to switch to electric fans you can just make me an offer.
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  #4  
Old September 4th, 2009, 09:40 AM
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Jason England
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Have you checked your radiator? Mine was partially blocked and that resulted in over heating under load.

My mechanic had new cores put in and with a new thermosat everything works as it should.

I think you can check this by feeling the radiator ... the lower part would be cooler becasue it blocked?

EDIT - just re-read and see you've already done this ... should put my glasses on first!
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Old September 4th, 2009, 10:43 AM
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Doug Walker
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I've heard you can weld the fan clutch so that it is locked on. But really, if the clutch is disengaged and you are overheating, the clutch is probably bad and you should replace it and try that.

Don't go with flexalites, imho. Been there done that. The stock fan (there is a higher draw fan that's made for the Middle East, maybe call Rovers North) is the most powerful when its working right. Is your cowl seated properly?

DW
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  #6  
Old September 4th, 2009, 12:57 PM
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Ian Gregory
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What model are your fans Jim? New or used, wiring kit and thermostat included or just the fans?

Sorry for the hijack.

Ian

Quote:
Originally Posted by JimC
I've got a pair of flex-a-lites I'm not going to use. If you want to switch to electric fans you can just make me an offer.
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  #7  
Old September 4th, 2009, 03:39 PM
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Eric Lindstrom
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I was having over heating poblems a few months ago. Replaced fan clutch with one from auto zone and haven't had any problems since.(knock on wood)
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  #8  
Old September 4th, 2009, 04:53 PM
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Isaac
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Quote:
Originally Posted by Lindy
I was having over heating poblems a few months ago. Replaced fan clutch with one from auto zone and haven't had any problems since.(knock on wood)
Eric,

Did you check your fan via the newspaper method? If so what was the result?

I've checked mine and it seems fine, but I'm just a tad over middle on the temp gauge.

Thanks,
Isaac
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  #9  
Old September 4th, 2009, 06:55 PM
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Phillip
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The fan clutch Ive had from autozone never locks up. 95 plus weather and the truck at 190-200 I never hear it. I have yet to find a fan clutch for the v-belt trucks.
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  #10  
Old September 4th, 2009, 06:57 PM
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Brian
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Charles and Jim, when I said Flex Fan I wasn't talking about electric fans. That was just what they called the aftermarket fan back then. It was just a regular fan made of aluminum and I guess it was engineered in such a way that it drew more air in and created a lot more noise as a result. Also, I have recently read here that the electric fans are not the miracle cure that some claim.

Haven't tried the newspaper trick yet but will definitely try that tomorrow. When I recored the stock rad and replaced the Tstat a couple years ago I could swear that I bought a new fan clutch. If I 'mis-remembered' that & reinstalled the old one then I will surely get a new one on there ASAP. Hope thats it. Cuz I get the feeling the prob is something simple.

Could someone give me the eGuages part # for the VDO temp guage that yall have installed on the 94'. Was it electrical or mechanical?
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  #11  
Old September 5th, 2009, 07:42 PM
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Rich Campbell
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Overheating

Make sure it isn't electrical. I had an overheating problem so I thought. Someone here recommended I turn all my power items on at once....lights, ac, heater ect to see if my temp went up. It did. As soon as I turned the items off it went down. another test I did was turn the 90 off when it is hot then turn it right back on and see if the temp gauge is lower. I think I have a ground fault which I'm still trying to figure out.
Worth a look before you start replacing items
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  #12  
Old September 5th, 2009, 09:45 PM
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My VDO gauge goes up when I turn on the AC, I cut the belt off so yeah...
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