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1 Introduction / 1.8 Water Leakage | PDF pages 27-28
1.8 Water Leakage
1.8 Water Leakage
1.8.1 Description and Operation
1.8.1.1 Diagnostic Information and Procedures
Diagnosis of Water Leakage
2. Carry out detection beginning from the bottom of the
window.
caution
3. Slowly move the hose upwards until it passes through the
Repair cannot proceed until all positions with water
entire roof.
leakage are detected. Random repair can only
temporarily plug the leakage position, possibly
Breather Pipe Test
increasing the difficulty in future repairs. Continue to
Note
carry out local tests within overall range to detect all
Breather hose test is only applicable to fully cured
positions with water leakage.
adhesives. The adhesive layer may be damaged,
The repair of body water leakage should be performed
increasing leakage points when applying this method.
through proper tests and diagnosis. Repair water leakage by
1. Dilute the liquid cleaner in a certain percentage and fill it in
adjusting incorrectly positioned parts and using appropriate
a spray bottle to spray it onto the edge of the window. Spray
repair materials. In the first place, determine the
at the bottom in the first place, and then gradually spray the
circumstances in which the water leakage may occur. For
entire roof in a bottom-up manner.
example, water leakage only occurs when the vehicle is
Note
parked on a slope. Second, if an approximate leakage
position is found, use a water hose or breather hose to
The pressure of compressed air should not exceed
determine the exact leakage point. If the leakage position is
205 kPa (29.75 psi).
not obvious, use a rain test bench to determine the exact
2. Let an assistant enter the vehicle while carrying an air
leakage position. This may involve the removal of partial
hose.
interior trim panels or partial parts.
Preparation for Water Leakage Test
3. Ask the assistant to aim the compressed air at the
suspicious leakage position. If leakage is detected at a
– The vehicle is designed to operate under normal
position, the liquid cleaner will turn to bubbles at the
environmental conditions.
leakage position.
– The design criteria for the sealing materials and parts
have taken into account the sealing strength required for
1.8.1.2 Repair Guidance
natural environmental factors. However, these specifications
cannot take into account all human conditions.
Repair of Water Leakage in Body
– The water leakage test procedures are related to natural
The repair of leakage may involve the removal of certain trim
environment and can determine the driving performance of
panels or parts depending on the leakage position.
the vehicle under normal conditions.
– The first step of diagnosing leakage is to determine the
1. Cut the adhesive applied to the seam in the leakage
conditions under which leakage occurs. If the approximate
position from inside or outside the vehicle.
leakage position can be identified, isolate the exact water
inlet using a water hose or breather hose. The repair of
2. Clear and remove all old adhesive residues from the
leakage may involve the removal of partial trim panels or
leakage position.
parts.
3. Apply sealant to the body and seams at the leakage
– Leakage in doors or windows may not be necessarily
attributable to poor sealing of the sealing strip. Perhaps the
position that have been cleaned.
water leakage in these positions can be repaired through
4. Wait a few hours for the seam adhesive to fully cure.
adjustment at these positions.
Water Hose Test
5. Detect if the leakage persists.
Note
6. Install the removed trim parts.
Do not use a water hose with a nozzle.
Repair of Water Leakage in Fixed Windows
1. Arrange an assistant and let it enter the vehicle to
The repair of leakage may involve the removal of certain trim
determine the exact leakage position.
panels or parts depending on the leakage position.
1. Determine the exact position of water leakage
2. If leakage is found on the edge of the front windshield,
apply special seam adhesive to repair the leakage or
replace the front windshield with new one that has been
sealed.
3. If leakage is found on the side of a fixed window, apply
special adhesive or replace the window with a new one that
has been sealed.