Oil Pressure Regulator Valve: Service and Repair
OIL PRESSURE RELIEF VALVEREMOVAL
1. Remove the oil pan.
2. To remove the relief valve, proceed as follows:
a. Remove the cotter pin that retains the retainer cap.
b. Drill a 3.175 mm (1/8 in.) hole into the relief valve retainer cap
c. Insert a self-threading sheet metal screw into cap.
d. Using a suitable slide hammer tool, remove retainer cap. Discard retainer cap
e. Remove spring and relief valve (Fig. 107).
INSPECTION
1. Inspect oil pressure relief valve plunger for scoring and free operation in its bore. Small marks may be removed with 400-grit wet or dry sandpaper.
2. The relief valve spring has a free length of approximately 49.5 mm (1.95 in.) it should test between 101 - 110 N (23 - 25 lbs.) when compressed to 34 mm (1.34 in.). Replace spring that fails to meet specifications.
INSTALLATION
1. Lubricate relief valve with oil.
CAUTION: The pressure relief valve must be installed as shown in (Fig. 107), or engine damage may occur.
2. Install valve, spring and retainer cap (Fig. 107).
3. Install new cotter pin.
4. Install the oil pan.