Procedure for adjusting valves on M?

Thanks,
Bobg

Both valves should now be closed on No1 cylinder
and you should set them at .020" cold with a feeler gauge. Remove distributor cap and crank the engine over one full turn, your rotor should be at No3 plug wire and both vavles closed, then one more full turn to No4, then No2. After the engine is hot you can reset to .017".

You can do this another way with the engine near operating temp, you can adjust them to .017" with
the engine idling. Be sure to set the brakes or chock the wheels. Hal

Thanks. I checked compression while I had the hood off and They were all real close to 100, put a little oil in the cylinder cranked her a couple of times and retested. They raised about 2 pounds. What is a compression? It works good and uses very little oil, but just checking a few things.

Bobg

Another reference to compression is the compression ratio. This is the difference between the volume of the cylinder when the piston is at the bottom of its travel and the volume of the chamber when the piston is at the top of its travel. For a close example in a 282 Diesel engine each cylinder has approximately 70.5 cubic inches of volume with the piston at the bottom of the stroke. If memory serves me correctly, the compression ratio on the engine is 16:1 which would mean that at the top of pistons travel there is only about 4.4 cubic inches of volume. Of course it takes a lot of energy to squeeze air because the pressure inside the cylinder increases dramatically which is necessary in a Diesel engine as this heat is the ignition source for the fuel.

This might be more than you wanted to know, or might raise other questions. Holler on the board if it did and someone here will answer.