BMW E28 valve clearance adjustment
Is the E28 valve clearance adjusted cold or warm?
Cold. A clearance that is too small when warm can stop the valve from closing properly. The correct value varies by engine and source, so check it against your own engine's specifications before adjusting.
How do you adjust the valve clearance on the M20 engine?
1. Remove the valve cover. 2. Turn the engine so that the cam of the valve being adjusted is at its dead point. 3. Loosen the 10 mm nut at the valve end of the rocker arm. 4. Turn the eccentric ball until a feeler gauge fits in the gap: 0.20–0.25 mm on a cold engine. 5. Tighten the nut and check the gap. The valve cover gasket can be reused if it is in good condition.
What tools are needed to adjust the M30 engine?
You need a 10 mm ring spanner, a feeler gauge and a flat-blade screwdriver for turning the eccentric. The crankshaft bolt can be reached with a 30 mm socket, a short extension and a ratchet. The engine can be turned by pushing the car in gear or from the crankshaft.