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B 18 oil pump 444-544

posted by  gabbiano on  Thu Mar 14 10:34 CST 2013
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last visit: Mon Sep 29 20:18 CST 2014
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It appears that my engine will need lots work (bore, align bore, new cam and lifters, etc.) and I don't want to reinstall the old oil pump if there is ANY doubt about it. Specs call for "radial clearance of 0.08 to 0.14 mm", and is this the clearance between a gear tip and the interior wall of the pump? "Flank clearance of 0.15 to 0.35 mm", and I assume this means that this is the allowable spacing between the closest point of approach of the two adjacent gears. Anyone care to confirm or refute? Feasible to rebuild a pump or better to replace?

Many thanks!

Al








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    B 18 oil pump 444-544

    posted by  walrus3 on  Thu Mar 14 19:21 CST 2013
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    last visit: Mon Dec 2 14:20 CST 2013
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    For clarification the radial clearance is the clearance between the ends of the teeth of the gears and the housing and the clearance should be 0.003" - 0.0055", aka three to five and a half thou.

    Flank clearance is measured between the teeth with a very narrow feeler gauge and they say 0.006" - 0.014" or six to fourteen thou.

    Since oil is fairly viscous the pump doesn't need to be too tight.
    --
    George Downs Bartlesville, Oklahoma








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      B 18 oil pump 444-544

      posted by  derek uk on  Fri Mar 15 15:19 CST 2013
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      last visit: Fri Oct 24 12:33 CST 2014
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      Pumps available now are B20 spec and these require a bit of cutting to the sump baffle plate on B18 engines. If not done it fouls the pump and can push it sideways. This can/will cause the oil to leak past the O ring and give low oil pressure.

      http://volvo1800pictures.com/wb/2/2_htm/22-05%20November%201969%20Oil%20pump%20B18%20engine.htm







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    B 18 oil pump 444-544

    uid 779's pic
    posted by  matt b on  Thu Mar 14 10:52 CST 2013
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    last visit: Tue Oct 14 16:33 CST 2014
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    I'd say just get a new one. Compared to the work and parts you'll be spending money on, a new high quality oil pump is cheap.

    --
    -Matt I ♥ my ♂








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      B 18 oil pump 444-544

      posted by  planetman on  Thu Mar 14 21:28 CST 2013
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      last visit: Fri Oct 24 09:29 CST 2014
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      Hello,

      Unless we have no choice, we ALWAYS install a new oil pump in rebuilt or overhauled engines.

      The only time we have not used a new oil pump is when we rebuilt a B16 Volvo engine as we have not been able to find any new oil pumps.
      --
      Eric
      Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
      Torrance, CA 90502








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        B 18 oil pump 444-544

        posted by  walrus3 on  Fri Mar 15 09:53 CST 2013
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        last visit: Mon Dec 2 14:20 CST 2013
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        Wow! If YOU can't find'em they must be REALLY well hidden!
        --
        George Downs Bartlesville, Oklahoma








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          B 18 oil pump 444-544

          posted by  planetman on  Fri Mar 15 21:00 CST 2013
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          last visit: Fri Oct 24 09:29 CST 2014
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          Hello George,

          I actually found 3 new B16 oil pumps, but the owner won't sell.

          He has 3 brand new B16 blocks and crankshafts and probably more, but he does not want to sell for some reason.

          The only thing I was able to buy from him were NOS B16 cam plugs.



          --
          Eric
          Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
          Torrance, CA 90502







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