Engine Notes

1972-73 TOYOTA W/8R-C & 18R-C - OIL PUMP REVISIONS  - From June, 1972, a new oil pump and pump drive shaft bushing (Part Nos. 15100-33011 & 11022-33010) have been introduced. This change was made to combat reports of hard starting which occurred suddenly on known well-tuned engines. This hard starting condition may be caused by wear of the distributor gear and oil pump drive shaft gear. The new pump ensures oil is pressure-fed directly to the meshing point of the distributor gear and oil pump drive shaft gear. If the pump drive shaft requires replacement, it is recommended that the oil pump and pump drive shaft bearing also be replaced to prevent recurrence of this problem.