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Old 07-15-2013, 02:45 AM   #1
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Problems on Maiden Voyage

Hello everyone.

Took our new (to us) '73 Winnebago Indian on its first road trip this weekend, from Anchorage, AK to Whittier, AK. - 115 miles. Found more than a few problems, with most of them minor annoyances, but a few more serious ones.

I have a fuel leak on the top of my 2nd tank, which I'm guessing is a dry-rotted rubber fuel line. I may have to drop the tank due to clearances.

There is an exhaust leak off the driver's side pipe, so a pipe replacement is needed. QUESTION: Is dual exhaust really needed, and if so, isn't a 'crossover' pipe mandatory for this type of setup? (V.I.N. decode says 413ci V-8, but I was told 440ci.)

Fresh water tank isn't angled correctly. Will it hurt the tank to increase the angle a few degrees to keep the pump from sucking air?

Last, the grey water is leaking between the tank and the valve. Is this PVC or a different material? If a different material, how can I fix the leak without replacing the pipe?

Steve
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Old 07-15-2013, 09:30 AM   #2
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Quote:
V.I.N. decode says 413ci V-8, but I was told 440ci.
413 - Spark plugs above the exhaust manifold
440-3 - Spark plugs below the exhaust manifold

Quote:
Is dual exhaust really needed, and if so, isn't a 'crossover' pipe mandatory for this type of setup?
Origianl had a "Y" pipe that joined together at passenger side frame rail in the area of the front of transmission. Dual exhaust is no problem as long as the pipe size is at least 2" or more. Only restriction could be is if your state inspection required a fully stock setup which could be a problem do to parts availability.

Quote:
Fresh water tank isn't angled correctly. Will it hurt the tank to increase the angle a few degrees to keep the pump from sucking air?
As long as you do not damage the piping you should be OK. You also have to make sure the tank is supported properly along it's entire length or it will crack.

Quote:
I have a fuel leak on the top of my 2nd tank
Hoses are the normal problem. They also can cause the fuel pump to suck air instead of gas. Insure you replace them with hoses that are designed to be used with ethenol in today's gas. Dropping the tank is typical. Also check the hoses at the tank selector switch for dryrot

Quote:
the grey water is leaking
Black ABS tank/piping or white polyethelene? ABS can be chemically welded and repaired using standard ABS plumbing techniques. Polyethelene is best done by plastic welding technique because the surface is to slick for epoxy based patches to adhere to it.

Dave
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1978 Winnebago Chieftain
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Old 07-16-2013, 02:13 AM   #3
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Thanks Dave.

I'll check the engine tomorrow, and take note of the plug location before I take it to the exhaust shop. Need to know whether I have a coach that has had an engine swap. BIG thanks for the info on that!

I found the leak when I switched from the main tank to the 2nd tank in the driveway while idling. After a minute or so of idling, the engine stalled. Pump probably started sucking air. Didn't want to drop the tank, but gotta do what I gotta do . . .

I'll check the hoses at the switch this weekend, when I do the tank hoses. I hadn't thought to check them, but it makes sense.

The tank pipe is black ABS. I checked it today. It is leaking by the tank dump valve, and at a 90 degree corner beneath the tank itself. Not sure where in the corner, as someone tried to cure the leak previously with duck tape.
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Old 07-16-2013, 11:25 AM   #4
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Quote:
It is leaking by the tank dump valve
There are valve repair kits (if it is the seals leaking) or you can replace the entire valve assembly. Either way is very inexpensive (< $20).

Dave
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