AJ16 Engine Service Manual
4.31 Oil Pump, Renew
SRO 12.60.26
Remove the oil pan, see Section 4.27.
1 Place a drain tray under the transfer housing. Remove the
housing bolts and housing
(1,2 Fig. 1).
. Remove the pick-up pipes (3 Fig. l), push back the lock
tabs (1 Fig. 2) and remove the pump sprocket bolts (2 Fig. 2).
. Remove the oil pump drive sprocket (3 Fig. 2), tab washer (4 Fig. 2) and shims.
. Remove the oil pump securing bolts and remove the
pump.
. Removethe pressure relief valve cap, spring, mandrel and
valve
(1-4 Fig. 3).
1 Clean the mating face in the cylinder block, the relief valve
assembly, sprocket and shims.
. Lubricate the relief valve assembly, assemble into new
pump, tighten the cap.
. Fitthe new oil pump tothe engine and tighten thesecuring
bolts.
1 Movethedrivechain asfar rearward aspossible,fit a shim
pack of 0.015 in. thickness to the oil pump flange (3 Fig. 4), align the bolt holes, fit the drive sprocket and two securing
bolts. Using
a straight edge (2 Fig. 41, check the alignment
of the oil pump drive sprocket (1 Fig. 4) and crankshaft
sprocket (4 Fig. 4).
1 Remove and refit the pump drive sprocket and adjust the
value of shim thickness as required in order to align the
sprockets.
. When the alignment is satisfactory, remove the pump
sprocket. Fit the chain and shims to the sprocket,fit to the
oil pump. Fit the tab washer and securing bolts. Tighten
the bolts and lock over the tabs.
. Ensure that the tension of the oil pump drive chain is cor- rect, see Service Data in the Preliminary Pages. Adjust by
slackening the tensioner securing screws, tapping the
tensioner inwards to increase the tension, and securing in
position when the tension is correct.
1 Fit new ‘0 rings to the oil pump pick-up pipes.
. Lubricate and refit the pipes to the pump.
1 Fit and seat the transfer housing. Fit and tighten the secur-
. Refit the oil pan, see Section 4.27.
ing bolts.
Fig. 3
Fig. 4
Issue 1 August 1994 51
