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tricks to bending up home made cooling lines

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Old Mar 12, 2007 | 09:41 PM
  #1  
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
tricks to bending up home made cooling lines

wasnt too bad of a deal, i just re-formed the good used ones i had around, need to shorten them up

thanks

Last edited by Randy82WS7; Mar 26, 2007 at 10:02 AM.
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Old Mar 12, 2007 | 09:54 PM
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7.0 camaro's Avatar
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From: knoxville tn
Car: camaro
Engine: 383
Transmission: 350 turbo
Axle/Gears: 3.42
i always get the longest advance auto or autozone has. get a tubing bender and a flaring set and make them the shape and length you need them.
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Old Mar 13, 2007 | 03:16 AM
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ede's Avatar
ede
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agreed start with the longest piece of tube you can get. use a quality bender, like one from ridgid or imperial and flare or reflare the line when you have the correct length. i always mark a bend on the inside of the radius with a sharpie, it'll help to always do things like that the same.
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Old Mar 13, 2007 | 11:56 AM
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
hi thanks well i have a bender and flaring kit thats no big deal thts the easy part but what im having a hard time with is that im used to bending these up on vehicles(such as the full size trucks) where there is some actual real room to do it and that are simple, but on these cars there is virtually none and i dont see how im going to be able to place and remove during test fittings between bends

also what is the max pressure that these lines probably will ever see, just curious, i have always wanted to have an idea what kinds of pressure the cooler lines have in them

or is it too variable to answer

thanks again
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Old Mar 13, 2007 | 02:35 PM
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From: Forest Grove Oregon
Car: 1989 Camaro RS, 355, holley 650dp
Engine: flow master headers, 3" exhaust
Transmission: 700r4
Axle/Gears: stock
this maybe a silly question, but I'd kinda like to know the answer...could a person use some braided steel hose? I think it would look cool...just a thought I had.
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Old Mar 13, 2007 | 02:47 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
You can use braided hose, if you don't mind the cost. Rubber hose would be cheaper, but not as "bling".
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Old Mar 13, 2007 | 10:24 PM
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From: Huntsville Alabama
Car: 89 IROC convert.
Engine: tpi 305
Transmission: T-5
Axle/Gears: 3.42 10 bolt
Bending up lines is not hard work, but there's definitely a learning curve on getting them to fit like you want. A little error in bend location here and there, and they won't fit anything. Make sure you have a good flairing tool as mentioned above, and of course don't use aluminum or copper tubing. The little 10 buck clamp-on flairing tools don't work so good on steel.
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Old Mar 13, 2007 | 11:11 PM
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
ive been told that these are too high of pressure to be using hose clamps and regular rubber hose

thats why i was wanting to at least get an idea of what kind of pressure is put throguh these on a stock tranny to see if there was any concern regarding using something other than steel and threaded or compressed connections, etc

im not sure what to do here, maybe ill try and re-bend these stock ones that somehow got bent out of shape

dunno.,

thanks

Last edited by Randy82WS7; Mar 13, 2007 at 11:31 PM.
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Old Mar 13, 2007 | 11:19 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Reinforced nylon hose, like bulk power steering return hose, and hose clamps work fine. The install kits for most auxiliary transmission coolers use something similar.
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Old Mar 14, 2007 | 07:28 AM
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From: NY
Car: 86 Iroc
Engine: 383
Transmission: TH350
Axle/Gears: 3:73s!
3/8s line is kinda tricky to bend. You cant make a suddle 90* bend, or it will kink, at least in my experiances.

On my Camaro, I used stainless steel braided line, Looks good, cost about 160 bucks for both.

Using rubber hose IMO is a way of rigging it up. Its not a permininate solution. It gets dry rotted, or worse, touchs the exhaust, melts, trans fluid everywere and then you have a fire before you know it.

Rubber hose is a "get off the highway" fix. Do it if your stranded, dont do it you can fix it right.

I beleave the presures going to the cooler is somewheres around 60PSI
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Old Mar 14, 2007 | 08:35 AM
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
60 psi is all ?

you sure ?


theres no 3/8" tubing involved with transmissions, theyre 5/16"


thanks
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Old Mar 14, 2007 | 08:38 AM
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bending tubing is a bit of an art, but totally do-able. here's some tricks:

use a piece of wire initially to bend into shape, and then you can copy the bends into the real thing. this way, you can even guage the total length you need. No points taken away if you need to put a union in the middle, if the length works out.

use a cam follower tubing bender (the one with 2 handles) very cheap, can buy it practically anywhere (pep boys, autozone, etc).

for very tight bends, you can stick the bender in a vice and work the tubing gently. one of the small cheapo single roll tubing benders works nicely here also.

rubber hose should always be less than 6" or so. not a good idea to run anymore, due to heat and abrasion. make sure the hose can handle OIL and has braided reinforcement (internally, as mentioned, power steering hose).

the more you bend, the better you get. get a good flare tool, and you'll have it all covered.
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Old Mar 14, 2007 | 10:50 AM
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
god point i could just use some solid copper wire and bend up what i want the tubes to be like

thats probably the best best, compared to anything else


thanks
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Old Mar 14, 2007 | 11:06 AM
  #14  
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Originally Posted by 86camaro383
Using rubber hose IMO is a way of rigging it up. Its not a permininate solution. It gets dry rotted, or worse, touchs the exhaust, melts, trans fluid everywere and then you have a fire before you know it.
Apart from the stainless braid, your hose is made of the same stuff. It needs periodic inspection and replacement like any other hose.
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Old Mar 14, 2007 | 03:42 PM
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From: NY
Car: 86 Iroc
Engine: 383
Transmission: TH350
Axle/Gears: 3:73s!
Yes, But its 10X better then plain jain rubber hhose thats .80 cents a foot.
----------
Originally Posted by Randy82WS7
60 psi is all ?

you sure ?


theres no 3/8" tubing involved with transmissions, theyre 5/16"


thanks

Yes but when using steel braided line, its only -4an and -6an.

Last edited by 86camaro383; Mar 14, 2007 at 03:43 PM. Reason: Automerged Doublepost
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