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Diesel in the oil is not an injector problem. It is more likely to be a leak in the lift pump diaphram or a leak in the leakoff pipe across the top of the injectors. The reason that specialist diesel shops are expensive is because there is more to injector servicing than setting the pressure. They have to be serviced in a dirt and dust free environment with special cleaning tools. It is possible that, like other before you who have done the job, you will now have to buy a complete new set. Hope for the best. The injector must be completely assembled and the pressure adjustment is made through the hole for the leak-off pipe. After adjustment, tighten the cap screw. 1st - set the pressure to 185 atu. 2nd - On the tester, slowly bring the pressure up to 150 atu then time how long the pressure takes to drop to 100 atu. This time should be between 6 to 45 seconds. If less than 6 secs the lapped faces of the nozzle are damaged and need to be replaced or reground. 3rd - Shut the valve to the gauge and test the spray pattern. The pattern should be from all four holes and spread out to two inches before striking the side of the spray container. If there are "lines" seen in the pattern the injector must be re worked or scrapped. Note. Do not use diesel to check the injectors, this could KILL you if any of the mist strikes any part of your skin. The spray can penertrate the skin easily as it is so fine. A special fluid is used for test purposes like Shell Fusus oil. 4th - Wipe the nozzle tips dry, hold the injector at 175 atu. Hold a piece of blotting paper on the tip for 1 minute. After that time the stain on the paper should not exceed 1/2" in diameter.If it does the nozzle seat will need to be refaced or replaced.
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