Oil Pressure Regulator Valve: Service and Repair

Pressure Relief Valve

Removal

1. After drilling a hole through valve plug, remove plug with a slide hammer or by prying.
2. Remove spring and valve from bore.

Inspection

1. Thoroughly clean valve bore and valve to remove any metal chips which may have entered bore as a result of drilling operation.
2. Inspect valve and valve bore for wear, scoring or galling.
If inspection determines part(s) to be unserviceable replace valve and/or cover.
3. Check clearance between valve and bore.
The valve should slip into bore without side play or binding.
4. Check spring for signs of fatigue or collapse.

Installation

1. Lubricate relief valve with engine oil and install in bore.
The end with smaller diameter goes in first.
2. Position spring in bore.
3. Install a new plug.
The plug can be tapped into bore using a plastic tipped hammer.
Ensure plug is O-O.25mm (O-O.O1O inch) below machined surface.