Cylinder Head Removed

Valve gear, to remove
(Cylinder head removed)

IMPORTANT: The cylindrical surfaces round the valve springs constitute sealing surfaces for the tappets. These surfaces must not be scratches.
The camshafts must come away from the bearing seats evenly.





1 Remove the camshaft bearing caps by undoing the bolts in steps of 1/2 to 1 turn. It is important to conclude removal at the bearing cap where the tappets are under load. Lift out the camshafts and remove the stuffing boxes. Note the marking.
2 Remove the tappets and keep them in the valve rack, part No. 83 93 7874 so that they do not get mixed up.
3 Insert protective sleeves, part No. 83 95 022.





4 Depress the valve heads using valve spring compressor 83 95 246 and remove the tappets.
5 Lift out the spring caps and valve springs. Also lift out the washers with valve guide seals using pliers 83 94 15.
6 Remove the valves and keep them in the valve rack, part No. 83 93 787 that they do not get mixed up.

Valve gear, to fit
(Cylinder head removed)

IMPORTANT: Make sure that the cylinder head is positioned so that the valves will not get bent when the camshafts are tightened down.





1 Fit the valves, washers and valve springs.
2 Use valve spring compressor 83 95 246 to fit the spring caps and tappets.
3 Remove the protective sleeves and refit the tappets.
Coat the cylinder head contact surfaces of the front bearing caps sparingly with part No. (10) 74 96 268, see illustration. Fit the camshafts, stuffing boxes and bearing caps, starting where the cams point downwards and press on the tappets.





4 Cylinders 1-3-5 (rear)
The locating pins for the camshafts should point to the inside bolts for the camshaft bearing caps. Cylinders 2-4-6 (front) The locating pins for the intake camshaft should be in line (downwards) with the inside bolts for the camshaft bearing caps. The guide pin for the exhaust camshaft should point straight up from the plane of the cylinder head.
Tightening torque: 8 Nm (6 ft. lbs.)

IMPORTANT: Tighten the bolts in steps of 1/2 to 1 turn at a time. The markings on the camshaft bearing caps and cylinder head must match. The bearing caps marked All -1-8 are for cylinders 1-3-5 and those marked R1 -R8 are for cylinders 2-4-6. The camshaft bearing seats in each cylinder head d are numbered 1-8.