Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE
Oil Pump: Inspection
- Check that there is no deformation, cracks or other damages.
- Check the oil pump shaft for looseness.
- Rotate the oil pump shaft by hand, and check for noise.
- Rotate the oil pump shaft by hand, and check for smooth rotation.
- Check oil strainer for clogging.
- Measure the secondary pressure (line pressure). Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Secondary Pressure (Line Pressure) Test>INSPECTION .
- Remove the oil pan and oil strainer. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>Oil Pan>REMOVAL .
- Check oil strainer for clogging.NOTE: When oil strainer has no clogging, replace the oil pump.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.