15016AA300 Subaru ROTOR-OIL PUMP, Price: 14.33$, Weight: 0.202kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
15016AA300 |
ROTOR-OIL PUMP |
0 |
0.202 |
2-3 |
14.33$ |
| Not Available | ||||||
Compatibility
Precision Oil Pump Rotor for Subaru Engines ?️?
Why this part is needed
This rotor is the heart of the lubrication system. It builds the oil pressure that feeds crank and rod bearings, camshafts, timing chains, and VVT units. A fresh rotor restores hot-idle pressure, quiets lifter noise, protects during cold starts, and extends engine life. It’s a smart choice during rebuilds or when pressure drops appear on the dash.
How it works
The pump uses a gerotor pair: an inner rotor driven by the crank/shaft and an outer rotor that turns inside the housing. As they rotate, cavities expand to draw oil in, then shrink to push oil out under pressure. Tight clearances, true faces, and correct endplay create stable PSI and prevent aeration. The rotor works with the relief valve to control maximum pressure and reduce cavitation at high RPM.
What happens if it’s broken
Worn or scored rotors cause low oil pressure, ticking valvetrain, VVT faults, and rising bearing temperatures. You may see the oil light flicker, metal glitter in oil, or sluggish pressure on cold starts. Continued use risks bearing wipe, spun rods, and engine seizure. Replace at the first signs of wear, sludge scoring, or housing grooves.
Tech tips ✅
- Measure rotor-to-housing clearance and endplay; resurface cover if needed.
- Prime with assembly lube and pre-fill the filter before first start.
- Inspect relief valve, O-rings, pickup tube, and screen for cracks or clogging.
- Use correct oil grade and torque specs to maintain stable pressure.
Compatibility
- Legacy
- Tribeca