Oil pump drive gear and reference sensor

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  • benz-tech
    Grease Monkey
    • Jan 2011
    • 338

    #1

    Oil pump drive gear and reference sensor

    I’m struggling to find info on this. I’m swapping my 323i over to Motronic. I have everything sorted except for two things.
    1) the oil pump drive gear that I have doesn’t have a flat bearing to sit on in the block. It seems like just spinning on cast iron will destroy everything. Realoem doesn’t show a bushing above the block, only below it for the shaft. The round bearing is in place but there is nothing for the flat surface.
    2) the timing sensor. For the cylinder sensor, does the spark plug wire go through it? Or is there something that it clips onto? Also number 1 or 6? Shouldn’t matter I suppose. I have the sensor but ii can’t un twist an ignition wire to slide it through.
    I appreciate the help. 323s are a rare bird and it does have the common piston rattle when cold. But my hopes are that with Motronic it might have a chance at passing smog. The worn out distributor I removed made up its own ignition timing with no rhyme or reason.
    You say "Where are your other two cylinders?"
    I say "Where's your other camshaft?"
    Frankenmotor: if an M42, M44, M20, S50, and S52 were to have a kid.
  • digger
    R3V Elite
    • Nov 2005
    • 5939

    #2
    Originally posted by benz-tech
    I’m struggling to find info on this. I’m swapping my 323i over to Motronic. I have everything sorted except for two things.
    1) the oil pump drive gear that I have doesn’t have a flat bearing to sit on in the block. It seems like just spinning on cast iron will destroy everything. Realoem doesn’t show a bushing above the block, only below it for the shaft. The round bearing is in place but there is nothing for the flat surface.
    2) the timing sensor. For the cylinder sensor, does the spark plug wire go through it? Or is there something that it clips onto? Also number 1 or 6? Shouldn’t matter I suppose. I have the sensor but ii can’t un twist an ignition wire to slide it through.
    I appreciate the help. 323s are a rare bird and it does have the common piston rattle when cold. But my hopes are that with Motronic it might have a chance at passing smog. The worn out distributor I removed made up its own ignition timing with no rhyme or reason.
    1) There is no separate thrust bearing. The cast iron is spot faced and the gear just sits on there supported radially by a needle bearing pressed into the block and one needle bearing at the top pressed into in the removable cap.

    2) The spark plug wires goes through it, you can buy wire sets with the sensor already installed. Or just not use it
    89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

    new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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