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Old 05-04-2021, 12:38 AM   #1
Asshat
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Water pump heater hose size? Straight six 292

The formed water pump return hose is 1” ID; and it seems to me the heater hose outlet is 7/8”. The one from the thermostat is 5/8”.
I don’t think there is 7/8” heater hose, is there?
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Old 05-04-2021, 07:40 AM   #2
The Rocknrod
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Re: Water pump heater hose size? Straight six 292

Gates makes a 7/8" heater hose but I thought the heater hoses were 3/4" and 5/8".
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Old 05-04-2021, 10:44 AM   #3
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Re: Water pump heater hose size? Straight six 292

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Originally Posted by The Rocknrod View Post
Gates makes a 7/8" heater hose but I thought the heater hoses were 3/4" and 5/8".
I thought so too. The water pump outlet for the heater is not 5/8” or 1” Is.
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Old 05-04-2021, 11:05 AM   #4
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Re: Water pump heater hose size? Straight six 292

Oh I think I see what might be the issue. If you look at a National Pipe Thread Reference Chart you'll see that a 3/4" Pipe thread is a tad over 1", they don't go by the normal nut and bolt references most of us are used to.
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Old 05-04-2021, 11:31 AM   #5
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Re: Water pump heater hose size? Straight six 292

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Originally Posted by The Rocknrod View Post
Oh I think I see what might be the issue. If you look at a National Pipe Thread Reference Chart you'll see that a 3/4" Pipe thread is a tad over 1", they don't go by the normal nut and bolt references most of us are used to.
Not sure what that has to do with National Pipe Thread sizes.
The water pump connections are cast. Just not sure why they chose a size different than the standard heater hose size. Unless it was intended to match the heater core inlet, which is also larger than 5/8”.
Is there a special hose from the factory that went from the water pump to the heater core?
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Old 05-04-2021, 11:58 AM   #6
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Re: Water pump heater hose size? Straight six 292

Maybe you can find a dual ID heater hose like this as an example - https://www.amazon.com/Gates-18083-H.../dp/B00LGPIWN0
It's hard to tell what your looking for though, no pics. is it in this pic?


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Old 05-04-2021, 05:28 PM   #7
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Re: Water pump heater hose size? Straight six 292

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Originally Posted by The Rocknrod View Post
Maybe you can find a dual ID heater hose like this as an example - https://www.amazon.com/Gates-18083-H.../dp/B00LGPIWN0
It's hard to tell what your looking for though, no pics. is it in this pic?

Yes - I it is the 63-64 292 version.
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Old 05-04-2021, 05:47 PM   #8
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Re: Water pump heater hose size? Straight six 292

Pics...
Thought I had more; I’ll have to post some later this evening.
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