Oil Pressure Relief Valve

Oil Pressure Relief Valve

Disassembly

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

Inspection

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

Assembly

1. Lubricate pressure 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 0-0.25 mm (0-0.010 inch) below machined surface.