Fluorescent Oil Additive Method

When diagnosing engine oil leaks, the source and location of the leak must be identified prior to service. The following procedure is very effective and requires a minimum of equipment. Before using this procedure, it is important to clean the cylinder block cylinder heads, valve covers, oil pan and flywheel with a suitable solvent to remove all traces of oil.
For an oil leak diagnosis using Rotunda 12 Volt Master UV Diagnostic Kit 164-R0756 or equivalent, perform the following procedure.

1. Clean engine with a suitable solvent to remove all traces of oil.
2. Drain engine oil from crankcase and refill with recommended oil, premixed with Diesel Engine Oil Dye 164-R3708 or equivalent. Use a minimum 14.8 ml (1/2 ounce) to a maximum 29.6 ml (1 ounce) of fluorescent additive to all engines. If oil is not premixed, fluorescent additive must first be added to crankcase.
3. Run engine for 15 minutes. Stop engine and inspect all seal and gasket areas for leaks using Rotunda 12 Volt Master UV Diagnostic Kit 164-R0756 or equivalent. A clear bright yellow or orange area will identify leak. For extremely small leaks, several hours may be required for the leak to appear.
4. If necessary, pressurize main oil gallery system to locate leaks due to improperly sealed, loose or cocked plugs. If flywheel bolts leak oil, look for sealer on threads.
5. Service all leaks as required.