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Fluorescent Oil Additive Method

  1. Clean the engine with a suitable cleaning fluid (brake cleaner).
  2. Drain the engine oil and refill with the recommended oil, premixed with Diesel Engine Oil Dye (164-R3705) or equivalent. Use a minimum 14.8 ml (0.5 ounce) to a maximum 29.6 ml (1 ounce) of fluorescent additive to all engines. If the oil is not premixed, fluorescent additive must first be added to the crankcase.
  3. Run the engine for 15 minutes. Stop the engine and inspect all seal and gasket areas for leaks using a 12 Volt Master UV Diagnostic Inspection Kit or equivalent. A clear bright yellow or orange area will identify a leak. For extremely small leaks, several hours may be required for the leak to appear.
  4. Road test the vehicle as necessary under various loads and check the engine for leaks again.
  5. As necessary regarding the specification, pressurize the main oil gallery system to locate leaks due incorrectly sealed, loose or cocked plugs. If the flywheel bolts leak oil, look for sealer on the threads.
  6. Repair all leaks as necessary.
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