Oil Pump Assembly: Disassembly

1990 Plymouth Sundance Base, 2D Hatchback, 2.5 J, AutomaticSECTION Disassembly

Remove attaching bolts and separate reaction shaft support from oil pump body. Mark inner and outer pump gears for reassembly reference. Remove gears from pump body.

OIL PUMP SPECIFICATIONS

Measurement In. (mm)
Outer Gear-to-Pocket .002-006(.045-141)
Outer Gear I.D.-to-Crescent .006-006(.045-.141)
Outer Gear Side Clearance .001-.002(.025-.050)
Inner Gear O.D.-to-Crescent .006-.012(.150-.306)
Inner Gear Side Clearance .001-.002(.025-.050)
  1. Install the inner and outer gears into the pump body. Using a feeler gauge, measure oil pump clearances as indicated in OIL PUMP SPECIFICATIONSΒ  .
  2. If oil pump clearances are not within specifications, oil pump assembly should be replaced. After clearances have been measured, install reaction shaft support-to-pump body and install attaching bolts.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.