Oil Pump Cover: Service and Repair

Removing And Installing Oil Pump Cover - Engine Removed

CAUTION: When working on the engine, absolute cleanliness is essential. An engine cover should be used on the engine assembly support. Lay removed engine parts on a clean base and cover them without fail. Even the smallest particles of dirt can block up oil bores.

Removing Oil Pump Cover
1. Place pan under the engine to collect any remaining engine oil which runs out.
2. Drain engine oil. Unscrew the oil drain plug (hexagon socket a/f 8) and drain emerging oil into an oil collection container. Insert plug with a new sealing ring and tighten.







Tightening torque 50 Nm (37 ftlb.)

3. Remove engine carrier by undoing the four hexagon-head bolts M10 x 80 (a/f 15) -arrows-.







NOTE: Undo the pressure relief valve (hexagon a/f 17) -Item 1 in figure below- before removing the oil pump cover since the cover must not be held in a clamping device to undo the valve if the oil pump is disassembled.







4. Remove oil pump cover by undoing the eight hexagon-head bolts: six M6 x 20 and two M6 x 80 -arrows-.







5. Carefully pull off oil pump cover. Do not use metal tools to lever off the cover as the sealing surface may be damaged. Remove moulded seal -arrow-.

Installing Oil Pump Cover

NOTE: Replace moulded seal for oil pump cover.







1. Carefully clean sealing surfaces on the cover and pump housing. Insert new moulded seal on pump housing -arrow-, then carefully insert the oil pump cover together with the driving pin (external hexagon) into the internal hexagon of the intermediate shaft -figure-. If necessary, turn the oil pump gear wheel by hand until the driving pin fits in the intermediate shaft and the oil pump cover can easily be pushed on.
2. Fasten oil pump cover with eight hexagon-head bolts: screw in six M6 x 20 and two M6 x 80 bolts and tighten to the specified torque -arrows-. If the oil pump has been disassembled, the pressure relief valve (hexagon a/f 17) must be fitted with a new sealing ring -1-.







Tightening torque for M6 hexagon-head bolts 10 Nm (7.5 ftlb.)

Tightening torque for pressure relief valve 25 Nm (19 ftlb.)

3. Fill in engine oil.
4. Install engine carrier by screwing in four new hexagon-head bolts M10 (self-locking, a/f 15) -arrows- and tightening.







Tightening torque for M10 bolt 45 Nm (33 ftlb.)

Tightening Torques