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Rebuilt b25 has no oil pressure

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    #1

    Rebuilt b25 has no oil pressure

    I just put together a whole internal bottom end and head from my previous running 325is into an oringed eta block. All new crank and rod bearings were used and plasti gauged within spec. Everything was torqued correctly and new rod bolts were put in. I used a good working oil pump.

    I just threw on the turbo and feed lines, basically everything but the cooling system is connected. I had hooked up a sunpro electrical oil pressure gauge which was reading randomly 20ish psi.

    I hooked up the sender to the gauge, power from distribution block, and ground at pass strut. When cranking I am seeing zero psi. There is no oil at the feed line and nothing comes out if I crank quickly with it disconnexted.

    I am at a loss because the pump and bearings are all within spec. I can only imagine maybe a mechanical failure such as the intermediate shaft or the rod from the pump to the shaft. Even then I doubt it because I've installed a pump on my back before so I am pretty sure I did it correctly with the engine on a stand. Any input please let me know thanks.
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    #2
    You haven't spun the engine long enough to push oil all through the engine, or something is wrong with the oil pump.

    Remove the cover on the right side of the engine where a conventional distributor would mount, pick out the gear to expose the oil pump drive shaft, and spin that with an electric drill to prime the engine. A 3/8" corded drill has enough speed/power to get 20-30psi of oil pressure.

    A 1/4" drive 6mm six point socket and a long extension with the socket end cut off is what I use.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

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      #3
      Originally posted by jlevie View Post
      You haven't spun the engine long enough to push oil all through the engine, or something is wrong with the oil pump.

      Remove the cover on the right side of the engine where a conventional distributor would mount, pick out the gear to expose the oil pump drive shaft, and spin that with an electric drill to prime the engine. A 3/8" corded drill has enough speed/power to get 20-30psi of oil pressure.

      A 1/4" drive 6mm six point socket and a long extension with the socket end cut off is what I use.
      couldn't of made it any easier.. I just pulled the timing belt off and spun the intermediate shaft with an air wrachet

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