Quote:
Originally Posted by COLVERT
Slip a large piece of cardboard under the engine. When it drips it will give you an accurate guide to where the leak is. Also try to set fire to a small piece of the wet cardboard. If it burns then it's diesel.---
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Just to point out that this may sometimes work. Usually not though, it just tells you which point on the subframe it runs down to before dripping.
I agree with Arctic, it's most likely source is the HP pump regulator or pump itself. The pump has three caps with multiple o rings to seal them. Is a pain to take off and replace (unless you've got 2 people doing it that have just done it 3 times in a row - you can get it down to 45minutes...)