Quick icp air test pointed me towards drivers side valve cover I pulled all the injectors and replaced the external soft seals and copper nozzle. 6.0 powerstroke high pressure oil leak test made easy | no start when hoteverything you need to know to to test high pressure oil system for leaks on 6.0l po. First remove the oil filter housing cap and then remove the oil filter Then have someone hold down the oil filter housing drain valve, and introduce air into the high pressure oil system. If a high pressure system leak is severe, the high pressure pump may use a larger volume of oil than the base engine (gerotor) pump can produce while cranking.
This involves removing the icp sensor, installing test fittings, and pressurizing the system with shop air while commanding the ipr valve closed You can then detect leaks using a stethoscope or listening tube.
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