Evening,

I took my IP out to replace the o ring. The old ring cracked when I pulled it off. I've got the lock pin in the IP, and the engine is still at 15 degrees ATDC. I'm wondering, when I put the IP back in should I use some sort of level to make sure its straight up and down? I noticed the holes in the IP where it bolts back there is space to move it a little. Does it make a difference if IP serrated shaft doesn't go back to the same slots in the block? Boy, am I tired. I've been working on this project since Sunday night. Thanks for your help.

Hugh Sr

1984 190d (W201/601)

Yep, the pump is slotted like that so you can adjust your pump timing, which I sort of referred to before in your last question. Hopefully a diesel guy can tell yo how to set your pump timing now. There is that adjuster on the front, I wouldn't turn that fixture at all, the best you can hope for is thatthe pump will end up in the same location as before, but in a case like this, the timing should probably be set again. You want to try to at least get it in the same location as before.

Gilly

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Install it in the middle of the slots, so if it's off you'll be able to rotate it a little inward/outward to get back into adjustment.
So install it like that (the 3 IP bolts and the center bolt), pull the lock out, turn engine to 15 atdc a second time, then put the lock back in and with the 3 bolts loose rotate the IP back and forth (with the adjustment screw?) in those slots 'til the tool locks.
Or maybe it'll already be spot on, my lock tool had a slot on it that I would twist with a flathead screwdriver, if it twisted then it was not locked.