NOTE: Tighten relief valve guide to … 30 ± 5 lb.ft.(40 ± 7 N·m)
(1) Front housing assembly.
(2) Oil pump cover assembly.
(3) 1W1788 Spring (pump pressure relief valve):
Length under test force … 2.360 in.(59.94 mm)
Test force … 71 ± 3 lb.(314 ± 14 N)
Free length after test … 3.080 in.(78.23 mm)
Outside diameter … .875 in.(22.23 mm)
(4) Width of oil pump rotors (new) … 1.4360 ± .0003 in.(36.474 ± 0.008 mm)
Depth of counterbore in front housing (new) … 1.4400 ± .0010 in.(36.576 ± 0.025 mm)
(5) Maximum permissible end clearance of oil pump rotors when measured with oil pump installed to front cover … .006 in.(0.15 mm)
VIEW A-A OF ROTOR OIL PUMP
(6) Clearance of oil pump rotor tip … .002 to .008 in.(0.05 to 0.20 mm)
Maximum permissible clearance of oil pump rotor tip … .011 in.(0.28 mm)
VIEW A-A OF FRONT HOUSING
(7) Bearing junction.
(8) Diameter of bearing for rotor (new) … 2.8041 ± .0022 in.(71.224 ± 0.056 mm)
(9) Position of main bearing junction from vertical centerline … 75 ± 30°