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radiator relocation?

Old Mar 16, 2004 | 08:08 AM
  #1  
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radiator relocation?

I am building up a 78 f 250 and we are planning on relocting the radiator behind the cab with an electric fan.

Have any of you ever done this? What is involved other than plumping? Does it require an auxilary water pump to go the distance?

Truck is a regular cab and has a 400.

Thanks
 
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Old Mar 16, 2004 | 08:24 AM
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why are you relocating the radiator?
 
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Old Mar 16, 2004 | 08:36 AM
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a number of reasons the first was an initial plan to swap steering boxs and move it forward to get a better geometry. i think for now I am doing a cross overwith the stock box and flipping the tie rod. Also I am going to flush mount a winch in the grill and trim up the front to get the best approach angle. The winch will be where the rad is.
 
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Old Mar 16, 2004 | 10:45 AM
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you need to talk to Pro b/c he has done this. all i can think of is the plumbing and even with an electric fan i believe Pro said he was still having overheating problems so try to put it up in the air a lil so that air can flow all around it!

i wish i had the ***** to put mine in the bed!

-Jason-
 
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Old Mar 16, 2004 | 11:46 AM
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check out pro's gallery for a pic of his. it snot a good idea if you still drive the truck on the road much, because at speed the radiator missees most of the air cuse the cab pushes it over. if this truck is mostly off highway then get some good elec fans and ride. i think pro used copper pipe of sumthin. alot of people get exhaust shops to run aluminized exahsut tubing
 
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Old Mar 16, 2004 | 12:57 PM
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imo, many problems with it in the bed is because it is mounted too close to the front, without a shroud (front and back), and too close to the floor. With electric fans, a shroud on the fan(s) side, and two feet of space in front of the radiator and two feet behind, I think it would be good to go. I would use pullers, not pushers.

You can buy a 2" pipe bender for $80 that will be good enough to put mild bends in stainless steel exhaust tubing. Put rubber insulation at least 1 inch around the tube where it enters the bed because off-road that bed will flex alot.
 
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Old Mar 16, 2004 | 02:34 PM
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FYI It is not going to be in the stock bed. That will be off permanantly this weekend. The rear is going to be a custom bent tube flat bed. I don't think i will be able to give up 4 feet of the bed though. I will have to measure up the final size for the bed and see how it would lay out. I was also thinking about using a pusher and a puller both flex-a-lite double fans. It will not be on the road alot but will need to be able to be streetable on occasion.
 
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Old Mar 16, 2004 | 02:48 PM
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you could do a search in here, proeliator has covered this subject extensively. Make sure to look farther back than 30 days when doing your search.
 
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Old Mar 17, 2004 | 07:30 AM
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The radiator's in the back of my Bronco, and it never gets above 180. On my othe project, the radiator is also in the back. The factory water pump is all I use, and it does the job very well. The only problem I had was priming the pump, but that was pretty easy once I knew what to do. I installed an auxilary electric water pump in my new project with a bypass, so that I could use the electric pump to prime the system, then once the mechanical water pump is doing it's job, I can shut the electric pump off. The most important thing to do is reduce the coolant line size down to 3/4 back to radiator, then expand it back up to 1 1/2 to go into the radiator, then reduce it again from the radiator back up to the block. I can take pix of my setup if you'd like.
 
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Old Mar 17, 2004 | 08:14 AM
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any picture you can get would be great.
 
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Old Mar 17, 2004 | 09:37 AM
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what kind of line did you use momudder?
 
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Old Mar 17, 2004 | 09:56 AM
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3/4 heater hose. Got the reduction parts from Lowes. I'll take appropriate pix t'night and try and get them posted in the next coupla days.
 
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Old Mar 17, 2004 | 10:24 AM
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heater hose all the way?? wow
 
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Old Mar 17, 2004 | 01:59 PM
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Yup. 3/4 (inside diameter) heater hose the whole 12 feet, both to and from the radiator. My neighbor tried running 1 1/2 " hose when he had his radiator mounted in the bed, but his motor kept overheating. The same reduced diameter **** increases the speed that the hot water gets back to the radiator to get cooled, and vice versa, whereas the same size HH all the way to the front and back moves at a slower rate. I think...but yea, either 1" of 3/4". 3/4" was cheaper, so I went with that and haven't had any problems.
 
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Old Mar 17, 2004 | 04:15 PM
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did you run it inside the framerail or what?
 
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