Fluorescent Oil Additive Method

When diagnosing engine oil leaks, it is important that the source and location of the leak be positively identified before service. The following procedure has been found to be very effective and requires a minimum of equipment. Prior to using this procedure, it is important to clean the cylinder block, cylinder heads, valve covers, oil pan and flywheel housing areas with a suitable solvent to remove all traces of oil.





To perform oil leak diagnosis use Rotunda Oil Leak Detector 164-R0756 or equivalent, in the following procedure.

1. Clean engine with a suitable solvent to remove all traces of oil.
2. Drain engine oil and refill with recommended oil, premixed with Rotunda Fluorescent Tracer Dye 164-R3705 or 164-R3700 or equivalent meeting Ford specification ESE-M99C103-A. Use a minimum 14.8 ml (1/2 oz) to a maximum 29.6 ml (1 oz) of fluorescent additive. If oil is not premixed, fluorescent additive must be added to crankcase first.
3. Run the engine for 15 minutes. Stop the engine and inspect all seal and gasket areas for leaks using Rotunda Oil Leak Detector 164-R0756 or equivalent. A clear bright yellow or orange area will identify the leak. For extremely small leaks, several hours of running the engine may be required for the leak to appear.
4. Service all leaks as required.