Just developed an intermittent oil leak that has got me puzzled. It only happens every few weeks and it seems to come only at highway speeds. After I clean the motor and drive it around town it doesn't leak but if I get up to 70+, oil pours out the left side of the motor around the injector pump area. The problem is that I can't find the leak because once it starts, oil is everywhere and when I stop and pop the hood, the leak stops.

Any suggestions?

Mav

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'91 350SDL 165K miles
Lovin' her until she blows...
'01 Dodge Ram Cummins 4X4 DWR
Stump pullin' beast...