Water heater engine hose

T

tom geiger

New member
Dec 31, 2006
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I’m looking at replacing the hose that runs from my engine back to the water heater. Part of me thinks plugging this on the engine and water heater
is the more sensible approach because of the potential danger to the engine. I mean, do I really need immediate hot water when I’m traveling?
Anyway, I have the hose to replace it. Replacing at engine, no problem, but how do you guys get it routed up from under the coach to the water
heater? Do you tape it off to the old hose and pull the old hose out from the bathroom to pull the new hose in? The old hose has been on there for
20+ years, so thought it is time to replace.

Thanks,
TG
--
Tom Geiger
76 Eleganza II
KCMO
 
Yes! In a typical GMC 26 foot with right side wet bath, you must use your old hose to pull the new hose through. Use a piece of tubing on the ID and
tape the hose ends together, then pull. You can go either way but if you pull the old hose completely out you’ll never thread the new stuff in by
itself without some major disassembly.
--
Chris Geils - Twin Cities / W Wa
1978 26' Kingsley w/ very few mods; PD9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, Alcoas, 54k mi
 
Tom
I disconnected it from the water heater in the bathroom and then drilled a small hole through the hose about 1/2” from the end. I drilled the holes into the new hose. I put a piece of wire through the holes and attached the two hoses together with the wire. I then wrapped it with duct tape and then pulled the hose through the wall by pulling the old hose from below while feeding in the new hose in the bathroom. If you just tape it without using the wire it will probably pull apart inside the wall.

Emery Stora
emerystora

>
> I’m looking at replacing the hose that runs from my engine back to the water heater. Part of me thinks plugging this on the engine and water heater
> is the more sensible approach because of the potential danger to the engine. I mean, do I really need immediate hot water when I’m traveling?
> Anyway, I have the hose to replace it. Replacing at engine, no problem, but how do you guys get it routed up from under the coach to the water
> heater? Do you tape it off to the old hose and pull the old hose out from the bathroom to pull the new hose in? The old hose has been on there for
> 20+ years, so thought it is time to replace.
>
> Thanks,
> TG
> --
> Tom Geiger
> 76 Eleganza II
> KCMO
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
 
I pulled the hose and the hot water heater out of my 78 Royale and now use
an "on demand" water heater I installed behind the fridge. No use having
all that hose that might leak in the future.
JR Wheeler 78 Royale 73 Painted Desert
Now living in Charleston, Oregon.........

On Sat, Aug 7, 2021 at 6:49 PM Emery Stora via Gmclist <

> Tom
> I disconnected it from the water heater in the bathroom and then drilled a
> small hole through the hose about 1/2” from the end. I drilled the holes
> into the new hose. I put a piece of wire through the holes and attached
> the two hoses together with the wire. I then wrapped it with duct tape and
> then pulled the hose through the wall by pulling the old hose from below
> while feeding in the new hose in the bathroom. If you just tape it without
> using the wire it will probably pull apart inside the wall.
>
> Emery Stora
> emerystora
>
>
>

> >
> > I’m looking at replacing the hose that runs from my engine back to the
> water heater. Part of me thinks plugging this on the engine and water
> heater
> > is the more sensible approach because of the potential danger to the
> engine. I mean, do I really need immediate hot water when I’m traveling?
> > Anyway, I have the hose to replace it. Replacing at engine, no problem,
> but how do you guys get it routed up from under the coach to the water
> > heater? Do you tape it off to the old hose and pull the old hose out
> from the bathroom to pull the new hose in? The old hose has been on there
> for
> > 20+ years, so thought it is time to replace.
> >
> > Thanks,
> > TG
> > --
> > Tom Geiger
> > 76 Eleganza II
> > KCMO
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
 
Good to hear that you are finally home.
Jim Hupy
Salem, Oregon

> I pulled the hose and the hot water heater out of my 78 Royale and now use
> an "on demand" water heater I installed behind the fridge. No use having
> all that hose that might leak in the future.
> JR Wheeler 78 Royale 73 Painted Desert
> Now living in Charleston, Oregon.........
>
> On Sat, Aug 7, 2021 at 6:49 PM Emery Stora via Gmclist <

>
> > Tom
> > I disconnected it from the water heater in the bathroom and then drilled
> a
> > small hole through the hose about 1/2” from the end. I drilled the holes
> > into the new hose. I put a piece of wire through the holes and attached
> > the two hoses together with the wire. I then wrapped it with duct tape
> and
> > then pulled the hose through the wall by pulling the old hose from below
> > while feeding in the new hose in the bathroom. If you just tape it
> without
> > using the wire it will probably pull apart inside the wall.
> >
> > Emery Stora
> > emerystora
> >
> >
> >

> > >
> > > I’m looking at replacing the hose that runs from my engine back to the
> > water heater. Part of me thinks plugging this on the engine and water
> > heater
> > > is the more sensible approach because of the potential danger to the
> > engine. I mean, do I really need immediate hot water when I’m traveling?
> > > Anyway, I have the hose to replace it. Replacing at engine, no
> problem,
> > but how do you guys get it routed up from under the coach to the water
> > > heater? Do you tape it off to the old hose and pull the old hose out
> > from the bathroom to pull the new hose in? The old hose has been on
> there
> > for
> > > 20+ years, so thought it is time to replace.
> > >
> > > Thanks,
> > > TG
> > > --
> > > Tom Geiger
> > > 76 Eleganza II
> > > KCMO
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
 
> I pulled the hose and the hot water heater out of my 78 Royale and now use an "on demand" water heater I installed behind the fridge. No use
> having all that hose that might leak in the future.
> JR Wheeler 78 Royale 73 Painted Desert
> Now living in Charleston, Oregon........

That is dandy with a 26, but with a 23 that has no gas to the reefer and it is on the opposite side from the galley and the head, the plan is not so
charming. When I found that the hose was missing, I just bought a box and took the day to reeve it thought the remaining holes and clamps. The only
other thing I had to buy is "Unicoils" to make the short radius bend where the hoses came up to the heater. It has been a wonderful system for 16
years.

Matt
--
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
 
In 2008 when I first got my 78 Royale, I parked my coach 1/2 way in the
shop. To facilitate jacking up the coach and having lots of room to handle
floor jacks, creepers, etc. As I was "only going to replace the brake pads"
it SHOULD HAVE only taken a couple of hours. RIGHT!
Let's see, upper and lower ball joints and control arm bushings, front
brake rotors, wheel bearings both sides, inner and outer CV joints and
boots, tie rod ends, drag link ends, anti sway bar links and bushings,
steering damper, and brake calipers and pads.
Then I found out about the tools needed to change the front wheel
bearings, big bucks. Two months later, it finally sat on it's new 10 ply
radial tires and freshly refinished 16" steel wheels, and fancy center hub
covers along with beauty rings.
Oh yes, I also replaced all the rubber vacuum hoses, fuel lines, and
heater hoses with the best stuff available at the time. Big time GMC
DOLLARS before I was through "just changing the front brake pads"
Probably $4000.00 before I was done. Heck, what else was I going to do
with that money, anyway?
Learned a whole bunch of stuff along the way, too. And a big bonus, I
knew exactly what I had up front when I was through.
The rear drum brakes was a whole nuther story. Oh I almost forgot. All
new KYB shock absorbers and all the bushings.
So, tain't nothing simple about working on these 40+ year old vehicles.
Just what it is. I bought the coach for about $8500.00 dollars. Probably
have waaayyy over $30,000.00 in it by now. Drove by an airstream trailer
dealer last week. Sale, only $98000.00 and some change. Oh yes, you need a
50 or 60 grand tow vehicle for it. GMC's are cheap things compared to that.
Jim Hupy
Salem, Oregon

> > I pulled the hose and the hot water heater out of my 78 Royale and now
> use an "on demand" water heater I installed behind the fridge. No use
> > having all that hose that might leak in the future.
> > JR Wheeler 78 Royale 73 Painted Desert
> > Now living in Charleston, Oregon........
>
> That is dandy with a 26, but with a 23 that has no gas to the reefer and
> it is on the opposite side from the galley and the head, the plan is not so
> charming. When I found that the hose was missing, I just bought a box and
> took the day to reeve it thought the remaining holes and clamps. The only
> other thing I had to buy is "Unicoils" to make the short radius bend where
> the hoses came up to the heater. It has been a wonderful system for 16
> years.
>
> Matt
> --
> Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL,
> GMCES
> Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum
> Brakes with Applied Control Arms
> SE Michigan - Near DTW - Twixt A2 and Detroit
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
 
Ok, looks like I’m in for a hose replacement. Does the manual have the coolant capacity amount that includes this hose run? Just seeing how many
jugs of coolant I need to get.

Thanks all,
TG
--
Tom Geiger
76 Eleganza II
KCMO
 
> Ok, looks like I’m in for a hose replacement. Does the manual have the coolant capacity amount that includes this hose run? Just seeing how
> many jugs of coolant I need to get.
>
> Thanks all,
> TG

TG,

When I plumbed mine back in, I didn't need to add a whole gallon to the system, and that is even with the spill that happened.

Matt
--
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
 
After properly joining the old and new hoses, may I suggest slathering the exterior of the hose with Ideal, GB or Klein electrician’s wire pulling
lube. This will allow easy sliding without a fight or chaffing the new hose.
Where an electrician’s tool works great for plumbing too!
--
John Lebetski
Woodstock, IL
77 Eleganza II
 
Oh good Matt, was thinking I would drain the whole system when I replace. Awesome, was wondering how I was going to pull this off in my driveway.
Looked up full cooling capacity and it’s 21 quarts.

Thanks,
Tom
--
Tom Geiger
76 Eleganza II
KCMO
 
If you have a Coachman model, it is easy and no need pull new hose as you
extract the old.

> Oh good Matt, was thinking I would drain the whole system when I
> replace. Awesome, was wondering how I was going to pull this off in my
> driveway.
> Looked up full cooling capacity and it’s 21 quarts.
>
> Thanks,
> Tom
> --
> Tom Geiger
> 76 Eleganza II
> KCMO
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>

--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
 
To me, having the heat exchanger system is one of the major plusses of GMC ownbership.

It's a total bonus having hot water for hours after you get parked up - I pulled into dry camping spot @11.30 thurs morning and still had good hot
shower and shave at 9am the following day. Just great. Can't imagine anyone disconnecting this feature!

Larry
--
Larry - Victoria BC -

1977 Palm Beach 40,000 miles, PO said everything working but forgot the word NOT. New Atwood fridge, water heater & furnace. New SS exhaust system,
6000w Onan, Iota Converter, R134A A/C, New fuel lines & heat exchange hoses
 
My water heater heat exchanger is not connected. I considered hooking it
up some time ago, but decided against adding all that hose, mainly to
avoid the risk of a leak...

In my case - I can heat water either with AC (fairly slowly) or with
propane (quickly!), so we've never really missed it.

Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath

> To me, having the heat exchanger system is one of the major plusses of GMC ownbership.
>
> It's a total bonus having hot water for hours after you get parked up - I pulled into dry camping spot @11.30 thurs morning and still had good hot
> shower and shave at 9am the following day. Just great. Can't imagine anyone disconnecting this feature!
>
> Larry
 
To my way of coach use, I wouldn't like to be without the engine heated
water. Judy and I really appreciate having hot water on the road, and when
we arrive at our destination. But, we cook a great deal in our coach, while
many other owners even take out the stove tops and ovens so they won't have
to cook. To each, his own, I guess.
Jim Hupy
Salem,Oregon

> My water heater heat exchanger is not connected. I considered hooking it
> up some time ago, but decided against adding all that hose, mainly to
> avoid the risk of a leak...
>
> In my case - I can heat water either with AC (fairly slowly) or with
> propane (quickly!), so we've never really missed it.
>
> Rob
> Victoria, BC
> 76 Royale - Rear Twins/Dry Bath
>

> > To me, having the heat exchanger system is one of the major plusses of
> GMC ownbership.
> >
> > It's a total bonus having hot water for hours after you get parked up -
> I pulled into dry camping spot @11.30 thurs morning and still had good hot
> > shower and shave at 9am the following day. Just great. Can't imagine
> anyone disconnecting this feature!
> >
> > Larry
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
 
I was shocked how easy it was by using the suggestions in this forum by connecting the old to the new and pulling them through. We just went through
this a couple years back and it's just peace of mind.

We also put in two shutoffs up in the engine box, for the run back to the water heater, just to have the option to shut it off if ever needed, for a
leak, or whatever.
--
Chris S. -
77 Kingsley, 3.70 FD, mostly OEM -
S.E. Michigan
 
I like that idea Chris! Will do the same when I get into this.

Thanks all,
TG
--
Tom Geiger
76 Eleganza II
KCMO
 
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