LeSabre V8-307 5.0L VIN Y 4-bbl (1984)
measure on flat undamaged surfaces.
B.
Using the original part measurement, order replacement parts according to the following selective charts.
CHART NUMBER 1
SELECTIVE PUMP ROTOR IDENTIFICATION
PART NUMBER
THICKNESS IN MM.
THICKNESS IN INCHES
8634091
17.948 - 17.961
0.7066 - 0.7071
8634092
17.961 - 17.974
0.7071 - 0.7076
8634093
17.974 - 17.987
0.7076 - 0.7081
8634094
17.987 - 18.000
0.7081 - 0.7086
8634095
18.000 - 18.013
0.7086 - 0.7091
CHART NUMBER 2
SELECTIVE PUMP SLIDE IDENTIFICATION
PART NUMBER
THICKNESS IN MM.
THICKNESS IN INCHES
8634081
17.948 - 17.961
0.7066 - 0.7071
8634082
17.961 - 17.974
0.7071 - 0.7076
8634083
17.974 - 17.987
0.7076 - 0.7081
8634084
17.987 - 18.000
0.7081 - 0.7086
8634085
18.000 - 18.013
0.7086 - 0.7091
NOTE:
The replacement part will provide the same clearance that the oil pump assembly was originally built with the proper end clearance
specification is 0.020 to 0.050 mm. or (.0008") to (.002").
C.
Hone both sides of the replacement rotor and slide to remove burrs, and measure the replacement parts with a micrometer to assure proper
selection.
NOTE:
Incorrect rotor selection could result in a damaged oil pump assembly and/or low oil pressure. Incorrect slide selection could result in
incorrect line pressure.
3.
Assembly:
A.
Reassemble the oil pump assembly following procedures outlined in the service manual.
B.
After assembling the oil pump onto the transmission install the converter and check for proper rotor and slide clearance by turning the
converter. The converter should turn freely. If the converter does not turn freely, recheck the pump rotor and slide selection.
C.
Install the transmission into the vehicle.
D.
Before road testing the vehicle, install an oil pressure gauge into the transmission and check oil pressure. Refer to the service for oil pressure
specifications.
