CATEGORY:    TECHNICAL

ATTENTION:   ALL DMC DEALERS/SERVICE MANAGERS

SUBJECT:     WATER LEAKS - BODY


Water leaks into the interior of the vehicle body may be difficult to
diagnose, and the following main points must be considered when a water
leak occurs.

     Does the leak occur with the vehicle in motion or standing
     still?
     With the vehicle in motion, a water leak in the interior may
     be related to a much lower or distant entry point on the
     exterior due to the fact that a lower air pressure may exist
     in the interior rather than the exterior of the vehicle and
     equalized airflow may transport water to distant exit points
     in the interior.  Splash water from the wheels may have an
     outside entry on the underside of the vehicle.  Water leaks
     that occur with the vehicle standing still usually appear at
     a lower point in the interior.

     Tilt of Vehicle
     Some leaks may occur with the vehicle in a tilted position
     causing designed drains to back up especially if large amounts
     of water are involved.

     High Water Pressure
     During washing or windstorms high water pressure may force
     water through seals and crevices or cause drains to back up
     and overflow.

     Drains
     Certain vehicle areas have designed drains to direct water to
     the outside.  For example, drains are found on the bottom of
     the doors or around the door openings of the body to allow
     water that entered at the window lip seals, which due to their
     function cannot provide a full seal, to escape to the outside.
     Water entering through the gap of the doors is drained to the
     outside.  Due to their function, all drains must be free of
     obstruction and seals (watertight) from the rest of the body.

     Sealing
     The joints of the body panels, windows, ducts, and cable
     passages are sealed in areas where water entering at these
     points would drain to the inside.
                                                        Continued...
ST-33-12/81
Water Leaks - Body
Page 2


Owner observations and thorough knowledge of the vehicle sealing and
draining areas will greatly assist in locating a water leak.

The attachment to this bulletin identifies sealed joints of the DMC
vehicle body.

When sealing the indicated joints use Dow Silastic 732 R.T.V or
equivalent.



William A. Charles
Director, Service/Parts

WAC:ak

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