Bad injector testing

[kmk]

I would run the dye test before doing anything else, you can clean the surface of the head with gasoline. If it is an o-ring it will show easily. A small crack in the head around the injectors can be more difficult to see with the engine running. If you cant find it, use the test plate for the actuators, a plug for the fuel return and a pump to pressure test the top gallery of the head without the engine running. Sometimes it takes rather high pressure to find these suckers. I wouldnt run the engine with diluted oil more than necessary. If you dont have the adaptor plate or pump, change the orings, they are cheap, add gear oil and watch the oil level after running it. Somebody was telling me about a cracked injector causing similar issue, but have never seen it myself. I saw a high pressure gear pump causing it, but it was also leaking through the weep hole abit. That one was weird-it was leaking more towards the drive gear shaft than the weep hole. Its supposed to be the other way around when the seal goes bad, but...