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.
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HOMESERVICE MANUALSSUBARU1989XT 2WD F4-1781CC 1.8L SOHCREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINEENGINE LUBRICATIONOIL PUMPSPECIFICATIONS
1989 Subaru XT 2WD F4-1781cc 1.8L SOHC
Oil Pump: Specifications
1989 Subaru XT 2WD F4-1781cc 1.8L SOHCSECTION Specifications
Oil Pump Dimensions
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| Relief Valve Spring Free Length | 1.854 Inch (in) | |
| Relief Valve Spring Installed Length | 1.319 Inch (in) | |
| Relief Valve Spring Load When Installed | 8.56-9.44 Pound-Force (lbf) | |
| Relief Valve Spring Height | Stamp Making A | 0.7437-0.7445 Inch (in) |
| Stamp Making B | 0.7441-0.7449 Inch (in) | |
| Stamp Making C | 0.7445-0.7453 Inch (in) | |
| Inner Rotor Outer Diameter | 1.4035-1.4055 Inch (in) | |
| Outer Rotor Outer Diameter | 1.9665-1.9685 Inch (in) | |
| Housing Depth | 0.8646-0.8677 Inch (in) | |
| Height Of Oil Pump Case Protrusion | 0.3138-0.3150 Inch (in) | |
| Side Clearance Between Rotor & Crankcase | 0.0020-0.0063 Inch (in) | |
| Case Clearance Between Rotor & Crankcase | 0.0039-0.0071 Inch (in) |
RENDER: 1.0x
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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.