Repairing the Leak

Once the origin of the leak has been pinpointed and traced back to its source, the cause of the leak must be determined in order for it to be repaired properly. If a gasket is replaced, but the sealing flange is bent, the new gasket will not repair the leak. The bent flange must be repaired also. Before attempting to repair a leak, check for the following conditions and correct them as they may cause a leak.

Gaskets

• The fluid level/pressure is too high.
• The crankcase ventilation system is malfunctioning.
• The fasteners are improperly tightened.
• The threads are dirty or damaged.
• The flanges or the sealing surface is warped.
• There are scratches, burrs or other damage to the sealing surface.
• The gasket is damaged or worn.
• There is cracking or porosity of the component.
• An improper seal was used, if applicable.

Seals

• The fluid level/pressure is too high.
• The crankcase ventilation system is malfunctioning.
• The seal bore is damaged, scratched, burred or nicked.
• The seal is damaged or worn.
• Improper installation is evident.
• There are cracks in the component.
• The shaft surface is scratched, nicked or damaged.
• A loose or worn bearing is causing excess seal wear.