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Old 01-01-2008, 12:45 PM   #1
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1998 31' Land Yacht
spokane valley , Washington
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Cool Antifreeze leakage

We have a 1998 airstream motorhome with 454 vortec eng. that consumes approx. one pint of antifreeze per 150 miles, have had it pressure tested twice and fassed the test okay, changed out the rad. cap twice, still consuming antifreeze.
Any insights out there ??

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Old 01-01-2008, 01:05 PM   #2
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2006 25' Safari FB SE
St. Cloud , Minnesota
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Heater core?

Do you ever smell any inside or outside?


5 meter Langford Nahanni

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Old 01-01-2008, 01:21 PM   #3
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2000 35' Land Yacht XL w/2 slides
Greenville , Ohio
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If it has similiar features as the Classic Motorhomes there are radiator hoses going to a stand alone heater, that in our 1984 motorhome is located under the couch and also to the waterheater. These hoses could have leaks anywhere along its length including at the connections or shut off valves. The heater also has a small heater core that could have a leak.
2000 Land Yacht XL 355
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Old 01-01-2008, 01:26 PM   #4
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1993 21' Sovereign
Colfax , North Carolina
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A 98 will have the plastic intake, and plastic intake gaskets. It could be seeping into the "combustion chamber area" of the intake, and burning it.
If you perform this repair yourself (if that's what's leaking), there is a pot metal fitting that has a heater hose quick-connected to it. That fitting tends to snap off when you mess with it, so be careful.
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