Removal Procedure
- Remove the center intake manifold. Refer to
Center Intake Manifold Replacement.
- Disconnect the fuel pressure regulator electrical connector (1).
- Reposition the distribution block hose clamps.
- Remove the distribution block hoses from the distribution block.
- Clean the fuel pressure regulator and high pressure injection pump thoroughly with solvent, such as GM P/N 12377981 (Canadian P/N 10953463) or equivalent.
- Using compressed air, thoroughly blow dry the regulator and pump.
- Remove the 3 fuel pressure regulator screws (1) using a T25 TORX®.
- Remove the fuel pressure regulator (1).
- If dirt or debris is found in the bore or seating surfaces of the fuel injection pump, perform the following:
• | Place a clean rag over the bore on order to collect the excess fuel. |
• | Bump the engine over in order to flush any debris out of the regulator bore. |
Installation Procedure
Note: If the pressure regulator is being re-used, check the O-rings for damage. If the O-rings are damaged, install NEW O-rings.
- Lubricate and install NEW O-rings onto the regulator. Lubricate the O-rings with clean, NEW engine oil.
Note: If the regulator is installed at an angle the O-rings may be damaged, resulting in possible fuel leakage.
- Install the fuel pressure regulator (1).
Caution: Refer to Fastener Caution in the Preface section.
- Install the 3 fuel pressure regulator screws (1) using a T25 TORX®.
• | Tighten the screws a first pass to
4 N·m (35 lb in). |
• | Tighten the screws a final pass to
7 N·m (62 lb in). |
- Install the distribution block hoses to the distribution block.
- Position the distribution block hose clamps.
- Connect the fuel pressure regulator electrical connector (1).
- Install the air outlet duct. Refer to
Air Cleaner Outlet Duct Replacement.
- Install the center intake manifold. Refer to
Center Intake Manifold Replacement.
- Prime the fuel system. Refer to
Fuel System Priming.
- Start the engine.
If the engine stalls, repeat the above step.
- Once the engine starts, inspect for fuel leaks.