I have an 1982 300SD and had to rebuild the engine after it seized. I'm having trouble figuring out how to time the injection pump because after the engine seized, I was unable to rotate the engine to TDC to mark the injection pump and I therefore have no marks to go by. I would appreciate any help on the matter.

Is the engine still apart? if so then it won't be hard. If the engine is together then the injection pump will have to be removed & re-installed at 24deg BTDC then you can do drip timing.

The engine is still out of the car. It has been completely rebuilt and all that's holding me up now is the injection timing. Could you explain the "drip method" for me? Thanks

brightem,

You will need a drip spout which is inexpensive and available from the parts shop here.

The best way to convey this procedure is for you to go to your nearest foreign car parts store and buy a Haynes manual. The procedure is quite clear, and the manual is inexpensive.

If for whatever reason you can't get a Haynes manual, let us know and we will go through the explanation here.

The basic steps are:

Put engine at top dead center on the compression stroke. You can do this by simply turning to TDC, if the cam timing mark does not line up, turn it one more turn to TDC and ensure that the cam timing mark lines up.

Align the notch in the injection pump splines with the mark next to the gear on the pump.

Install the pump in place with the bolts slightly snug such that the pump is in place but can be turned with a little pressure.

Remove the check valve from number one fitting and replace fitting.

Connect spout. And pump vigorously with hand pump to build pressure.

Turn engine slowly to 24 degrees BTDC. Turn the pump until you are getting one drop per second from the spout. You may have to pump the hand pump some more.

Tighten the pump bolts and recheck for one drip per second, readjust if necessary.

Don't forget to replace the check valve under the number one fitting.



Where you really need the manual is for the picture of the injection pump timing marks.

Good luck,