REMOVAL & INSTALLATION
On Types 1 and 2/1600, the pump can be removed while the engine is in the car, but it is first necessary to remove the cover plate, the crankshaft pulley, and the cover plate under the pulley. On Types 3, 4, 2/1700, 2/1800 and 2/2000, the oil pump can be taken out only after the engine is removed from the car and the air intake housing, the belt pulley fan housing, and fan are dismantled. On the Automatic Stick Shift models, the torque converter oil pump is driven by the engine oil pump.
On Type 1, 2/1600, and 3 remove the nuts from the oil pump cover and then remove the cover and its gasket. Remove the gears and take out the pump with a special extractor that pulls the body out of the crankcase. Care should be taken so as not to damage the inside of the pump housing.
On Type 4, Type 2/1700, 2/1800, and 2/2000 engines, remove the four pump securing nuts and, prying on either side of the pump, pry the pump assembly out of the crankcase. To disassemble the pump, the pump cover must be pressed apart.
Prior to assembly, check the oil pump body for wear, especially the gear seating surface. If the pump body is worn, the result will be loss of oil pressure. Check the driven gear shaft for tightness and, if necessary, peen it tightly into place or replace the pump housing. The gears should be checked for excessive wear, backlash, and end-play. Maximum end-play can be checked using a T-square and a feeler gauge. Check the mating surfaces of the pump body and the crankcase for damage and cleanliness. Install the pump into the crankcase with a new gasket. Do not use any sealing compound. Turn the camshaft several revolutions in order to center the pump body opposite the slot in the camshaft. On Type 1, 2/1600, and 3 the cover may now be installed. On Type 4, Type 2/1700, 2/1800, and 2/2000 models, the pump was installed complete. Tighten the securing nuts.