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 MANUALSJEEP1991CHEROKEE 2WD L4-150 2.5L VIN P MFIREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIROIL LEVEL CHECKSANKYO COMPRESSOR
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFI
Sankyo Compressor
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFISECTION Sankyo Compressor
1. Operate air conditioning system for 10 minutes.
2. Stop engine, then disconnect A.C. compressor clutch connector.
3. Front-seat the discharge and suction service valves.
4. Determine mounting angle as follows:
a. Using suitable angle gauge across the flat surfaces of the front mounting ears.
b. Read the mounting angle to the closest degree.
c. All models except Grand Wagoneer, have 0 ° mounting angle.
d. Grand Wagoneer models, have 65 ° mounting angle.
5. On models with SD 508 compressor, look through oil filler plug hole and rotate clutch front plate to position internal parts.
6. On models with SD 709 compressor, rotate clutch front plate counterweight to 30 °.
7. On all models, insert dipstick tool No. J29642-12 to its stop position. The stop is the angle near the top of dipstick. The bottom surface of the angle must be flush with surface of oil filler hole.
8. Remove dipstick, then compare to chart.
9. Add or subtract oil until mid-range value is reached. For example if mounting angle is 10 ° and dipstick increment is 3, add oil until 7 is attained.
10. Ensure seat and oil ring are secure and clean.
11. Install oil filler plug, torque to 6-9 ft. lbs.
2. Stop engine, then disconnect A.C. compressor clutch connector.
3. Front-seat the discharge and suction service valves.
4. Determine mounting angle as follows:
a. Using suitable angle gauge across the flat surfaces of the front mounting ears.
b. Read the mounting angle to the closest degree.
c. All models except Grand Wagoneer, have 0 ° mounting angle.
d. Grand Wagoneer models, have 65 ° mounting angle.
Fig. 2 Compressor Oil Level Check. Sankyo 508 Compressor:
5. On models with SD 508 compressor, look through oil filler plug hole and rotate clutch front plate to position internal parts.
Fig. 3 Compressor Oil Level Check. Sankyo 709 Compressor:
6. On models with SD 709 compressor, rotate clutch front plate counterweight to 30 °.
Fig. 4 Mounting Angle Degree & Oil Level. Sankyo Compressors:
7. On all models, insert dipstick tool No. J29642-12 to its stop position. The stop is the angle near the top of dipstick. The bottom surface of the angle must be flush with surface of oil filler hole.
8. Remove dipstick, then compare to chart.
9. Add or subtract oil until mid-range value is reached. For example if mounting angle is 10 ° and dipstick increment is 3, add oil until 7 is attained.
10. Ensure seat and oil ring are secure and clean.
11. Install oil filler plug, torque to 6-9 ft. lbs.
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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.