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Old 08-18-2017, 12:18 PM   #1
jkmhb
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Question 58 modified which radiator hoses?

On my 58 - I have a pre-LS small block V8 set back (with a small cap distributor it fits in front of an unmodified firewall). The motor also has a Holley Stealth Ram fuel injection and serpentine system off a 94 Silverado. The thermostat housing I used comes out at about a 45 degree angle towards the driver's side. I also have a Champion Aluminum Radiator.

My question - if anyone has an idea, are there molded radiator hoses that I can use for the upper and lower? I would rather avoid the accordion style universal hoses. A Gates 20505 lower was listed to fit, but was way too short!

Thank you.
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Old 08-18-2017, 01:56 PM   #2
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Re: 58 modified which radiator hoses?

I use a flexible aluminum air duct that's close in size from hardware store to mimic the radiator hose. I bend it to the shape that's required then tape outside of duct to keep shape run to auto parts store to compare correct size and diameter OD radiator hose. Funny but it works
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Old 08-18-2017, 06:03 PM   #3
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Re: 58 modified which radiator hoses?

Most "good" parts places have a decent inventory of preformed radiator hoses. Armed with a rough idea and a tape measure, the counter guys let me go through their hoses and come up with a couple that worked. The lower hose had to be cut, shortened and twisted a little to make it fit. I just cut between the bends and used a piece of stainless pipe to join the 2 halves back together.
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Old 08-18-2017, 06:07 PM   #4
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Re: 58 modified which radiator hoses?

That's a great idea, if I can find a decent real auto parts store.
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Old 08-18-2017, 07:42 PM   #5
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Re: 58 modified which radiator hoses?

Quote:
Originally Posted by Rude Dude View Post
I use a flexible aluminum air duct that's close in size from hardware store to mimic the radiator hose. I bend it to the shape that's required then tape outside of duct to keep shape run to auto parts store to compare correct size and diameter OD radiator hose. Funny but it works
Rude Dude is exactly correct, i wish I had thought of that, but I made up a mock up of various towel and toilet paper rolls, (my wife still doesn't know where all that paper had gone to), and although it wasn't smooth in shape, it worked at the local NAPA store. of course they asked about the amount of paper I had wasted, but that's for another story. Watch out for the mysterious question you'll be asked: uhhhh sir, what is the year of truck and motor size you are using? duhhhhh
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Old 08-18-2017, 11:52 PM   #6
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Re: 58 modified which radiator hoses?

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Rude Dude is exactly correct, i wish I had thought of that, but I made up a mock up of various towel and toilet paper rolls, (my wife still doesn't know where all that paper had gone to), and although it wasn't smooth in shape, it worked at the local NAPA store. of course they asked about the amount of paper I had wasted, but that's for another story. Watch out for the mysterious question you'll be asked: uhhhh sir, what is the year of truck and motor size you are using? duhhhhh
X3. I used a wire coat hanger, bent it up and headed to NAPA to find one. I had to shorten both upper and lower hoses. I am using a swivel neck housing from Summit. So far no complaints.
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Old 08-19-2017, 10:49 PM   #7
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Re: 58 modified which radiator hoses?

Rude Dude's suggestion works great. You have to have more than a little bit of vision though as the hose you want most likely is part of another hose that has the right bends where you need them.
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Old 08-20-2017, 10:18 AM   #8
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Re: 58 modified which radiator hoses?

I did same thing. with a coat hanger not as hard as I thought it was gonna be
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Old 08-20-2017, 12:02 PM   #9
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Re: 58 modified which radiator hoses?

Yep, did this for years. A good parts store will have a LOT of hoses to go through. Keep an open mind in that you may get a hose 2 feet long and cut both ends ending up with a foot long hose for your truck. The bends can be less than perfect but end up working well. So keep an open mind when you are making your template too, make a few different ones so you can have some options as to where the bends really need to be, often they can be moved quite a bit, as long as the ENDS are where they need to be.

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Old 08-22-2017, 03:44 PM   #10
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Re: 58 modified which radiator hoses?

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Originally Posted by jkmhb View Post
The thermostat housing I used comes out at about a 45 degree angle towards the driver's side. I also have a Champion Aluminum Radiator.
If the radiator inlet is on the drivers side look at a 70 Z-28 hose. That is what I used for my 64 Chevelle when I upgraded the radiator. The Z-28 t stat housing points like your. On my truck I used the coat hanger method. Here are the numbers I used, lower might work for you.

A member asked what radiator hoses I used. The upper is a Gates 20416, I had to shorten the end that goes on the radiator. The lower is a Gates 20584, I had to shorten the radiator end on it too. The applications are not GM, I took in a bent wire and diameters. I got them at OReilys.
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Old 08-23-2017, 12:59 PM   #11
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Re: 58 modified which radiator hoses?

i used a blend of rubber hose and ss tubing
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Old 08-23-2017, 03:05 PM   #12
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Re: 58 modified which radiator hoses?

what"s the radiator for originally?
If it's a 58 chevy truck, and the radiator hoses are too short, you were looking at 6 cyl. hoses.
Go back and ask for V8 hoses. Mine were too long, and had to cut about an inch and a half off of the top hose, and the bottom one fit perfectly. I used an 89 Corvette gen 1 engine with an edelbrock intake. But you have to go get a straight thermostat housing,not a 45 degree outlet. it all fits like factory.

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Old 09-10-2017, 09:29 PM   #13
jkmhb
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Re: 58 modified which radiator hoses?

can't use a straight thermostat housing - it would put the upper hose in the path of the serpentine idler I'm using (system off a '94 Silverado).It's all going to be kind of tight, also trying to run air filter on a Holley Stealth Ram.
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