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Old 02-17-2020, 04:42 PM   #1
M2M
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Question Radiator hose diameters

I had a brand new black with red stripe top radiator hose split wide open and was lucky not to destroy the engine.

I want to buy a new hose set and want to avoid the hoses the suppliers sell. Does anyone know the diameter of the top and bottom hoses so I can try maybe NAPA or elsewhere? Thanks.
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Old 02-17-2020, 05:07 PM   #2
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Default Re: Radiator hose diameters

I just replaced my top hose with a replacement from Bratton’s. It seems to be 2” inner diameter. The bottom hose seems to be 1 3/4” inner diameter.


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Old 02-17-2020, 05:08 PM   #3
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Default Re: Radiator hose diameters

For whatever reason, the black with red stripe hoses are pricey.


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Old 02-17-2020, 05:22 PM   #4
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Default Re: Radiator hose diameters

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Originally Posted by shew01 View Post
For whatever reason, the black with red stripe hoses are pricey.


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The black with red stripes were used on most cars while the completely red ones were rare on original ones. You would think that the red ones would be more expensive? Maybe it is the fact that the black hoses have to have a red stripe added, more work?
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Old 04-23-2020, 05:19 PM   #5
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Default Re: Radiator hose diameters

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Originally Posted by M2M View Post
I had a brand new black with red stripe top radiator hose split wide open and was lucky not to destroy the engine.

I want to buy a new hose set and want to avoid the hoses the suppliers sell. Does anyone know the diameter of the top and bottom hoses so I can try maybe NAPA or elsewhere? Thanks.

Follow up post.

I went to Napa and to an other auto parts store; both sold hose by the ft that was very similar to the supplier's hose but had a white or green stripe rather than a red. Seemed to me slightly thicker and better made.

In the end though, it decided I wanted the best available hose on the market so purchased black silicone hose which is 4ply for the 2" ID hose (supplier's is 2 ply), and 3ply for the 1 3/4" hose.
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Old 04-23-2020, 05:26 PM   #6
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Default Re: Radiator hose diameters

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I went to NAPA and told the guy I needed Model A hoses and he ordered them so they must have them already figured out. Of course I wasn't getting them for a show car but they fit fine.
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Old 04-23-2020, 05:48 PM   #7
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Default Re: Radiator hose diameters

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Originally Posted by M2M View Post
I had a brand new black with red stripe top radiator hose split wide open and was lucky not to destroy the engine.

I want to buy a new hose set and want to avoid the hoses the suppliers sell. Does anyone know the diameter of the top and bottom hoses so I can try maybe NAPA or elsewhere? Thanks.

OK, understand there are at least two different suppliers of Radiator Hoses. As I understand it, one set is made off-shore and very susceptible to issues as you are describing. The other set are US manufactured. Ask your supplier where the origin of manufacture is, and go from there. I only use the US made ones and have never had an issue. FWIW, there is not any value in using the silicone hoses as there should not be any pressure on the system.
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Old 04-23-2020, 07:36 PM   #8
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Default Re: Radiator hose diameters

Are the red striped ones made overseas? Why avoid suppliers?
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Old 04-23-2020, 08:04 PM   #9
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Default Re: Radiator hose diameters

I bought the red striped ones last year and they physically fell apart in six months. I don't remember who I purchased them from, I will check my records for the supplier.
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Old 04-23-2020, 08:13 PM   #10
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Default Re: Radiator hose diameters

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Are the red striped ones made overseas? Why avoid suppliers?

This is why. A new hose with under 200 miles.

thumbnail_20190722_175639.jpg
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Old 04-23-2020, 08:19 PM   #11
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Default Re: Radiator hose diameters

Looks pretty beat up for 200 miles. Did you contact the supplier and ask about a replacement ?
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Old 04-23-2020, 08:23 PM   #12
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Default Re: Radiator hose diameters

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I bought the red striped ones last year and they physically fell apart in six months. I don't remember who I purchased them from, I will check my records for the supplier.

I didn't think I was the only victim. I wonder how many guys have suffered engine damage because of these fake hoses.
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Old 04-23-2020, 08:26 PM   #13
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Default Re: Radiator hose diameters

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I didn't think I was the only victim. I wonder how many guys have suffered engine damage because of these fake hoses.
What did the supplier say when you brought it to their attention ?
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Old 04-23-2020, 08:34 PM   #14
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Default Re: Radiator hose diameters

I've got hoses on order currently. I got the black/red stripe because they said "American made", plus they look better than the Orange hoses IMO.
I hope I don't get junk like described here..
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Old 04-23-2020, 09:04 PM   #15
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Default Re: Radiator hose diameters

I purchased my black silicone hoses from Pegasus Auto Racing Supplies, New Berlin WI.

"This hose is built for endurance and performance in custom coolant plumbing and intake systems. Silicone rubber with 4-ply reinforcement makes this hose tough, reliable, and flexible to temperatures from -50°C to +200°C (-58°F to +356°F)."

https://www.pegasusautoracing.com/gr...pID=COOLSHORTK

Could not find any other suppliers of 2" ID silicone straight hose.

Also purchased some hi-temp glue spray which is on special:

https://www.pegasusautoracing.com/pr...asp?RecID=6854

And they didn't charge me tax.
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Old 04-23-2020, 11:11 PM   #16
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Default Re: Radiator hose diameters

You never did answer whether you contacted the company that sold you the faulty hose and what their response was. Who was it purchased from ?
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