Thread: 383 oil issues

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In my opinion, Jerry nailed it. The motor is running itself out of oil.
Sling the HV pump over the fence and install a standard M55 pump. It's all the pump the motor will need. Set the pickup at 3/8" to 1/2" off the floor of the pan, using modeling clay to find the clearance. Make an ice-cream-shaped lump of clay and smush it onto the bottom of the pickup, then trial fit the pan, observing the length of the clay. Any closer than 3/8" to 1/2" may allow the pump pickup to suck down against the bottom of the pan and shut off supply to the pump. Any farther away than that will leave oil in the bottom of the pan that should be moving around the motor.

Some fellows will use Play-Dough for finding the clearance. I like to use oil-based modeling clay from the crafts store.