door seals will allow water to enter the passenger compartment during high pressure washing or hard driving rain
(severe) conditions. Overcompensating on door or glass adjustments to stop a water leak that occurs under severe
conditions can cause premature seal wear and excessive closing or latching effort. After completing a repair, water
test vehicle to verify leak has stopped before returning vehicle to use.
VISUAL INSPECTION BEFORE WATER LEAK TESTS
Verify that floor and body plugs are in place, body drains are clear, and body components are properly aligned and
sealed. If component alignment or sealing is necessary, refer to the appropriate section of this group for proper
procedures.
WATER LEAK TESTS
WARNING: Do not use electric shop lights or tools in water test area. Personal injury can result.
When the conditions causing a water leak have been determined, simulate the conditions as closely as possible.
•
If a leak occurs with the vehicle parked in a steady light rain, flood the leak area with an open-ended garden
hose.
•
If a leak occurs while driving at highway speeds in a steady rain, test the leak area with a reasonable velocity
stream or fan spray of water. Direct the spray in a direction comparable to actual conditions.
•
If a leak occurs when the vehicle is parked on an incline, hoist the end or side of the vehicle to simulate this
condition. This method can be used when the leak occurs when the vehicle accelerates, stops or turns. If the
leak occurs on acceleration, hoist the front of the vehicle. If the leak occurs when braking, hoist the back of the
vehicle. If the leak occurs on left turns, hoist the left side of the vehicle. If the leak occurs on right turns, hoist
the right side of the vehicle. For hoisting recommendations (Refer to LUBRICATION & MAINTENANCE/HOIST-
ING - STANDARD PROCEDURE).
WATER LEAK DETECTION
To detect a water leak point-of-entry, do a water test and watch for water tracks or droplets forming on the inside of
the vehicle. If necessary, remove interior trim covers or panels to gain visual access to the leak area. If the hose
cannot be positioned without being held, have someone help do the water test.
Some water leaks must be tested for a considerable length of time to become apparent. When a leak appears, find
the highest point of the water track or drop. The highest point usually will show the point of entry. After leak point
has been found, repair the leak and water test to verify that the leak has stopped.
Locating the entry point of water that is leaking into a cavity between panels can be difficult. The trapped water may
splash or run from the cavity, often at a distance from the entry point. Most water leaks of this type become appar-
ent after accelerating, stopping, turning, or when on an incline.
MIRROR INSPECTION METHOD
When a leak point area is visually obstructed, use a suitable mirror to gain visual access. A mirror can also be used
to deflect light to a limited-access area to assist in locating a leak point.
BRIGHT LIGHT LEAK TEST METHOD
Some water leaks in the luggage compartment can be detected without water testing. Position the vehicle in a
brightly lit area. From inside the darkened luggage compartment inspect around seals and body seams. If neces-
sary, have a helper direct a drop light over the suspected leak areas around the luggage compartment. If light is
visible through a normally sealed location, water could enter through the opening.
PRESSURIZED LEAK TEST METHOD
When a water leak into the passenger compartment cannot be detected by water testing, pressurize the passenger
compartment and soap test exterior of the vehicle. To pressurize the passenger compartment, close all doors and
windows, start engine, and set heater control to high blower in HEAT position. If engine can not be started, connect
a charger to the battery to ensure adequate voltage to the blower. With interior pressurized, apply dish detergent
solution to suspected leak area on the exterior of the vehicle. Apply detergent solution with spray device or soft
bristle brush. If soap bubbles occur at a body seam, joint, seal or gasket, the leak entry point could be at that
location.
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BODY
WK