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Old 01-09-2011, 06:37 PM   #29
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Quote:
Originally Posted by Keyair
To clarify..
The Aux heater under the rear third of the sofa has a pull knob under the sofa(see my first pic right side of pic). This controls flow of coolant from the engine to the heater core. The dash switch then controls the fan speed. The heated air comes out of the vent in the toe board under the rear edge of the sofa!
The water heater function is actually in the water heater...
Did I get this right now???
Got it! Thank you.
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Old 01-09-2011, 06:39 PM   #30
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1995 28' Excella
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Quote:
Originally Posted by Keyair
Ok, back to the AUX heater...

The replacement valve arrived today!
Got it off Ebay, for under $18 shipped.
Its identical to the original... and you can see how bad shape it was... siezed solid!
Is that the part the hooks to the pull cable to allow the coolant flow?
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Old 01-10-2011, 12:00 AM   #31
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Is that the part the hooks to the pull cable to allow the coolant flow?
Yes, the cable has a loop on the end, and that pulls on the pin you can see sticking up/out.
More photos coming...
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Old 01-20-2011, 12:42 PM   #32
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I did a pressure test on the heater core.... its not leaking!
I am thinking to clean it up, back flush reuse it now!
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Old 02-12-2011, 01:06 PM   #33
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I spent some time pressure flushing the core with the hose, back and forth untill it ran clear, then I filled it with some radiator flush solution and left it for a few days.
More junk came out, so another power flush and it seems to be clean inside now.
I retested the pressure, just in case.

Here is my pressure test rig!
Two Short lengths of 3/8" hose, 4 hose clips, one old tire valve, and one bolt with a round caphead, that was about 3/8" dia.




Looks like this assembled...



I know that the radiator system cap can be 12 or 16psi, and my Craftsman coolant pressure test kit says 25psi is the maximum safe pressure, so thats what I tested it too.
I pressurized the tire valve to 25psi via my tire inflator, from my compressor.

I tried it in a bucket of water... but there is so much air trapped in the core vanes, it was still releasing bubbles forever after!



In the end, I left it out of water for a couple of hours, and then rechecked the pressure, and it was within 1psi, which allowing for the small volume of air and the slight loss every time you attach and detach the inflator.

I think I will call it good!
Time to reassembel the unit!
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Old 02-13-2011, 02:37 PM   #34
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Keyair,
I didnt read through the whole thread, but just asking...were you not able to find a new replacement? I'd hate to see that old one fail and flood your interior with fluid..
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Old 02-13-2011, 02:42 PM   #35
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Hi,
Yes, I found several that fitted, but I am fairly comfortable that its ok, based on the pressure test.
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Old 02-16-2011, 08:06 PM   #36
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So almost a week later, I go to take off the "test fittings, and I get a loud powerful hiss!
I guess it really is holding the air pressure!

Today, I treated the surface rust on the main body and gave it a coat of paint!
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Old 02-21-2011, 08:40 PM   #37
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Here is the final assembly.
I could not get the Manufacturers sticker off, so masked around it.
Decided to do the motor bracket, and grilles silver for fun!


Motor assembled and fan in place with the clip.




I added foam sealing tape all around to seal the air path and prevent the core moving around, and reassembled.


Core securing brackets in place.


Done!
Still have to give the screws a dust of paint before I tighten them, and add the wiring grommet.

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Old 02-25-2011, 06:16 AM   #38
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Talking

Looks great. Now you should get another 25 years of service from the heater
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Old 02-26-2011, 10:35 AM   #39
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Lets hope Rob!
I am still puzzled by the taped off vent here...
Should it be like this?
Anyone?

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Old 03-28-2011, 12:25 PM   #40
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I removed my couch to get the bottom cushions re-stuffed today, while it was out I took the opportunity to replace the heater control valve and remembered this thread. Anyhow, here is a picture of mine, as you can see mine is covered with a sheet of metal that appears to be factory so I am guessing yours came blocked off as well...
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Old 03-28-2011, 04:58 PM   #41
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Originally Posted by MEANlowGREEN View Post
I removed my couch to get the bottom cushions re-stuffed today, while it was out I took the opportunity to replace the heater control valve and remembered this thread. Anyhow, here is a picture of mine, as you can see mine is covered with a sheet of metal that appears to be factory so I am guessing yours came blocked off as well...

Awesome!
I will make an aluminium plate then.... tape just does not do it for me!
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Old 03-28-2011, 07:31 PM   #42
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Agreed, mine appears to be covered by a scrap of the factory vinyl clad interior aluminum. At least the duct tape was used on a duct... Something it is rarely used on, although I still don't think you are supposed to cover large vent holes with it. Glad I was able to help you out a little bit.
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