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Welcome to “The RV Doctor is In”

The RV Doctor, Gary Bunzer, answers RV technical questions submitted by members of the RV community.

To have RV Doctor Gary Bunzer help cure what ails your RV, post questions in the comments section. Note that he can only diagnose and offer prescriptions for a select few conditions. Although every effort is made to ensure accuracy, not all responses will apply in every instance. Some situations will require additional inspection or testing. Before following instructions or procedures covered in this video series, you must satisfy yourself that products, equipment, and your personal safety won’t be compromised or jeopardized. When in doubt, work with an RV service facility. The advice offered by the RV Doctor is solely that of Gary Bunzer and not of RM Acquisition, LLC d/b/a Rand McNally. Likewise, products and manufacturers provided as examples don’t signify endorsement by Rand McNally.

  1. Ed Allen

    Vapor lock sometimes stops us, especially on hot days up hill on my 1985 Winnebago. Engine is 454 Chevy with carburetor. Fuel pump is mechanical mounted on engine block. Gas line from tank is 1/2 inch. I have an electric pump installed in line midway between the gas tank and the fuel pump. Some times the electric pump helps. I have insulated the fuel pump and the 3/8 inch gas line between the fuel pump and carburetor. We seldom have a problem when we travel in the fall when it is cooler and we are driving at lower altitudes. How can I fix it?

  2. Donald Watkins

    I have a 2003 Fleetwood Discovery. My coach got dirty so I stopped at a one of those car washes you see along side the road in a small town. I didn’t ask what they were using in the wash , they were washing other vehicles I thought it would be ok. It looked ok but when I got home I noticed there was no wax on my coach. Also noticed some some spots that the clear coat was starting to breakdown. I got my grandson to wash it and wax it thinking that would help. So my guestion is, I know you can’t see it, but what can I do to stop it going any further. And put back the clear coat in the spots that has come off without having the whole coach repainted at a body shop? Thanks for your help and what you do for us all who love RV’ing

    Donald Watkins MSgt
    US Air Force Retired

  3. David Pelizzari

    I have the Lube thru bearings on my new 5th wheel. How do I service these and How often should I do it.