Leaks in a tyre rim most likely result from the type of alloy material used on most cars. Previously, steel rims leaked air through the rim and the tyre. Alloy rims cause a leak through porous holes found in cast-aluminium alloy. The holes can be repaired, but you may wind up replacing the rims or tyres if the leak persists.
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Inflate the tyre with the rim leak up to 2.75 BAR (39 PSI).
Remove the rim and place it in a large bucket of water. Note areas in which bubbles form. This indicates the origin of the leak.
Mark the areas with a grease pencil and take the rim out of the water.
Demount the tyre from the rim.
Sand the area with 80-grit sandpaper and brush off any debris or remnants.
Dab the area lightly with a towel and clean the leak area with carburettor cleaner or white spirit.
Cover the area thoroughly with a silicone gasket sealant, which should close the leak.
Let the rim dry for a few hours before remounting it on the tyre.
Tips and warnings
- Refrain from using silicone tub caulking -- it may cause the metal wheel to become corroded.
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