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Home >> BMW >> 1978 >> 630CSi Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 5301, 633CSI & 733I 6 Cylinder >> Crankshaft Main & Connecting Rod Bearings >> Engine Front Cover And Oil Seal >> Upper Front Engine Cover

Upper Front Engine Cover

  1. Remove distributor cap and valve cover. Remove thermostat housing and thermostat. Rotate crankshaft until number one cylinder is at TDC of compression stroke. Distributor rotor should point at notch in distributor.
  2. Disconnect vacuum lines to distributor. Loosen pinch bolt on distributor mounting and pull out distributor. Remove guard, EGR line and check valve. Remove upper timing cover bolts and take off cover with distributor drive gear.
  3. To install, thoroughly clean all mating surfaces, fill bores of timing cover with Dirco (or equivalent) sealer, replace cord seal around distributor drive gear, and replace cover with new gasket and sealer. Turn distributor rotor counterclockwise so that rotor tip is about 1 1/2" (3.5 cm) from notch in distributor housing and guide distributor into position. Note that vacuum advance unit is aligned approximately 90° to valve cover when installed properly.
  4. Lightly tighten bolts one and two (see Fig 1), then tighten remaining bolts to specification in sequence shown in illustration. Tighten bolts one and two to specification. To install remaining components, reverse removal procedure.
    Fig 1: Upper Front Cover Tightening Sequence
    G09334314Courtesy of BMW OF NORTH AMERICA, INC.
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