Fuel Pump Installation

Special Tools 

EN-52443  High Pressure Fuel Pump Alignment Tool

Equivalent regional tools: Special Tools 

1. Courtesy of GENERAL MOTORS COMPANY

   The EN-52443  High Pressure Fuel Pump Alignment Tool has two ends marked with Number 1 (1) and Number 2 (2).

2. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   • The camshaft MUST be at the base circle position before the fuel pump is installed.
   • At the base circle position, the EN-52443  High Pressure Fuel Pump Alignment Tool will sit flush with the cylinder head.

   Install the EN-52443  High Pressure Fuel Pump Alignment Tool (2) with the Number 1 (1) on the outside and turn the crankshaft until the camshaft lobe is at the base circle position.

3. Remove the EN-52443  High Pressure Fuel Pump Alignment Tool (2).

4. Courtesy of GENERAL MOTORS COMPANY

   Lubricate the fuel injection pump shaft lifter roller (1) with engine oil. Adhesives, Fluids, Lubricants, and Sealers 

5. Fuel Injection Pump Shaft Lifter Roller (1) - Install

6. Courtesy of GENERAL MOTORS COMPANY

   Fuel Pump Housing Seal (2) - Install NEW

NOTE:

The fuel pump flange must be fully seated to the cylinder head.

7. Fuel Pump (1) - Install
CAUTION:

Alternately hand-tighten the fuel pump bolts one turn at a time until the pump is fully seated. Trying to draw down the pump without even side-to-side tightening may result in pump plunger damage.

CAUTION:

Fastener Caution

8. Fuel Pump Bolt (3) - Install and tighten [2x] 36 N.m (27 lb ft)