is it diesel that is bubbling out? if so it could be the connector tube o-ring.
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2000 2500 QCLB AT, 4x4. Auto to manual to auto swap, Goerend Transmission,150hp sticks, 5" Exhuast, AD 150, ADR/Pulse, twins in the works.
Thanks to Coaltrain Diesel Performance, Rollin Smoke Diesel
Ohio Coal Rollers