Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Oil Pump


Rotor Backlash 0.0080 [02]
Rotor To Body Clearance 0.0010-0.0035 [03]
Rotor Endplay 0.0010-0.0035 [01]
Rotor Thickness (Minimum)
Outer 0.944
Outer Rotor Diameter (Minimum) 2.469
Maximum Cover Flatness Variation 0.002
Relief Spring Free Length 1.950
Relief Spring Pressure, Lbs. @ Inches 20.0 @ 1.340

All measurements given in inches, unless otherwise specified.


[01] - Measured between pump cover mounting surface & end of gear using straightedge & feeler gauge.
[02] - Maximum inner & outer rotor tip clearance.
[03] - Maximum clearance between inner & outer rotors and body.