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2. Apply an aerosol type powder, such as foot powder, to the suspected leak area. 3. Operate the vehicle for 24 km (15 mi) or until normal operating temperatures are reached. 4. Shut OFF the engine. 5. Inspect the suspected leak area. 6. Trace the leak path through the powder in order to find the source of the leak. 7. Make the necessary repairs. Dye and Black Light Method A fluid dye and black light kit is available from various tool manufacturers. 1. Follow the manufacturer's instructions in order to determine the amount of dye to use. 2. Detect the leak with the black light. 3. Make the necessary repairs. Find the Cause of the Leak Pinpoint the leak and trace the leak back to the source. You must determine the cause of the leak Gaskets Fluid level/pressure is too high Plugged vent or drain-back holes Improperly tightened fasteners Dirty or damaged threads Warped flanges or sealing surface Scratches, burrs or other damage to the sealing surface Damaged or worn gasket Cracking or porosity of the component Improper sealant used, where applicable Incorrect gasket Seals Fluid level/pressure is too high
2007 Hummer H3 2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3
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