GM Service Manual Online
For 1990-2009 cars only

Size Classification

Thickness (mm)

Thickness (in)

Important: 

   • Rotor and sleeve must be chosen from the same size classification as the oil pump body.
   • Allowable rotor and sleeve to fluid pump body end play is as follows:

Specification

   • 

Sleeve to fluid Pump Body End Play -- 0.030-0.051 mm (0.0012-0.0020 in)

   • 

Rotor to fluid Pump Body End Play -- 0.030-0.051 mm (0.0012-0.0020 in)

The fluid pump assembly has a selective rotor and sleeve components. These components are chosen based on pump body dimensions. Fluid pump rotor and sleeve components are available in five size classifications (1, 2, 3, 4, and 5) with the following tolerances:

Rotor Selection

1

17.948-17.961

0.7066-0.7071

2

17.961-17.974

0.7071-0.7076

3

17.974-17.987

0.7076-0.7081

4

17.987-18.000

0.7081-0.7086

5

18.000-18.013

0.7086-0.7091

Sleeve Selection

1

17.948-17.961

0.7066-0.7071

2

17.991-17.974

0.7071-0.7076

3

17.974-17.987

0.7076-0.7081

4

17.987-18.000

0.7081-0.7086

5

18.000-18.013

0.7086-0.7091

Fluid Pump Body Depth

1

17.978-18.012

0.7077-0.7091

2

17.978-18.025

0.7083-0.7096

3

18.004-18.038

0.7088-0.7101

4

18.017-18.051

0.7093-0.7106

5

18.030-18.064

0.7098-0.7111