Detroit Diesel — Remove Oil Pump
Repair & overhaul · Lubricating oil pump
From a Detroit Diesel service manual — check it applies to your exact model before use.
Procedure
- Remove the oil drain plug from the lower oil pan and drain the oil from the engine.
- Remove the lower oil pan, gasket and as many upper oil pan inspection hole covers as necessary.
- 8V-149: remove the six bolts and lock washers securing the oil pump outlet adaptor to the pump and cylinder block; remove adaptor and pressure relief valve as an assembly.
- Remove the four bolts and lock washers attaching the oil pump inlet elbow to the pump; remove the elbow and screen assembly.
- Remove the two bolts and two stud nuts securing the oil pump to the main bearing caps; remove the oil pump. Save the shims used between the pump mounting flange and the rear main bearing cap.
- 12V and 16V: remove scavenging pump inlet pipe supports, inlet pipe, outlet pipe support brackets and clips, oil pump outlet pipe, outlet adaptor, scavenging pump outlet pipe, and inlet elbow.
- Remove the four bolts and two stud nuts (six bolts on former engines) securing the oil pump to the main bearing caps; remove the oil pump and save the shims.
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.