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Just need confirmation on heater hose sizes [message #348493]

Tue, 24 September 2019 14:16

Green machine

Messages: 184
Registered: July 2019
Location: North Vancouver BC

Karma: 5

Senior Member

Hello again gang!

I am replacing all rubber hoses on my coach. Fuel, vacuum, upper and lower rad, and heater hoses.

On the heater hoses I am going to bypass the rear heater for now and just want to confirm the sizes going to/from the heater core.

My belief is the one coming from the top rear of the intake manifold is 3/4" and the one going from the front of the engine to the inlet of the heater core is 5/8".

Can you fine folks confirm or correct my thoughts please.

TIA

Shawn Harris North Vancouver, Canada 1977 Palm Beach 403

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Re: Just need confirmation on heater hose sizes [message #348494 is a reply to message #348493]

Tue, 24 September 2019 14:41

lqqkatjon

Messages: 2324
Registered: October 2010
Location: St. Cloud, MN

Karma: 5

Senior Member

for sure 5/8" and 3/4"!

had to bypass the heater core a week ago when it let go. I only had a 5/8 or a 3/4" barbed splice. Had to jam the 3/4" splice into the 5/8" hose to connect the two hoses together.

Jon Roche 75 palm beach EBL EFI, manny headers, Micro Level, rebuilt most of coach now. St. Cloud, MN http://lqqkatjon.blogspot.com/

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Re: Just need confirmation on heater hose sizes [message #348496 is a reply to message #348493]

Tue, 24 September 2019 15:35

pjburt

Messages: 437
Registered: February 2016
Location: Fresno, California

Karma: 1

Senior Member

Shawn, if you're asking about the long heater hoses going back to the "heater core", they are 5/8" and actually go to the water heater.

Green machine wrote on Tue, 24 September 2019 12:16

Hello again gan that is actually the water-heater.g!

I am replacing all rubber hoses on my coach. Fuel, vacuum, upper and lower rad, and heater hoses.

On the heater hoses I am going to bypass the rear heater for now and just want to confirm the sizes going to/from the heater core.

My belief is the one coming from the top rear of the intake manifold is 3/4" and the one going from the front of the engine to the inlet of the heater core is 5/8".

Can you fine folks confirm or correct my thoughts please.

TIA

Jerry Burt Fresno, CA.
73 Gmc 26' Canyon Lands
Members: FMCA - GMCMI - GMCWS
A truly happy person is one who can enjoy the scenery on a detour.

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Re: Just need confirmation on heater hose sizes [message #348497 is a reply to message #348496]

Tue, 24 September 2019 15:39

pjburt

Messages: 437
Registered: February 2016
Location: Fresno, California

Karma: 1

Senior Member

I need to make that a little more coherent.

Shawn, if you're asking about the long heater hoses going to the back of the coach, they are 5/8" and actually go to the water heater. (Unless your PO has added an aux heater.)

Jerry Burt Fresno, CA.
73 Gmc 26' Canyon Lands
Members: FMCA - GMCMI - GMCWS
A truly happy person is one who can enjoy the scenery on a detour.

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Re: Just need confirmation on heater hose sizes [message #348499 is a reply to message #348497]

Tue, 24 September 2019 16:18

Green machine

Messages: 184
Registered: July 2019
Location: North Vancouver BC

Karma: 5

Senior Member

pjburt wrote on Tue, 24 September 2019 15:39

I need to make that a little more coherent.

Shawn, if you're asking about the long heater hoses going to the back of the coach, they are 5/8" and actually go to the water heater. (Unless your PO has added an aux heater.)

Im bypassing (not using) the ones to the rear of the coach for now. Only concerned was with the 2 hoses from the heater core to the engine and I think i got my answer above.

Thanks

Shawn Harris North Vancouver, Canada 1977 Palm Beach 403

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