For 1990-2009 cars

### Removal Procedure

1. Remove the oil pressure relief valve.

Remove the closure bolt (1).

2. Remove the spring and the piston.
3. Clean the parts.
4. Inspect the parts.
5. Clean the thread.

### Installation Procedure

1. Install the oil pressure relief valve.

Caution: Refer to Fastener Caution in the Preface section.

2. Install the spring and piston in the pump module together with the closure bolt.

Tighten
Tighten the closure bolt to 21 N·m (16 lb ft).