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Broken88's Engine Assembly Question Thread

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  • Broken88's Engine Assembly Question Thread

    Might as well start a thread for all my questions. I am reassembling my engine after a year of taking it apart. This is the first S14, let alone BMW, I have ever worked on. Spent almost 20 years building water-cool Volkswagens and I knew them inside and out. This is a whole new world for me and I am going to have a ton of questions as I m putting everything back together.
    My first question is simple: What is this hole used for (circled in red)? This isn't a picture of my car. Found it on google images just for reference. I know the ones to the left of it are for the power steering bracket. And the oil filter housing is above it. But I can't figure out what this hole is for. I've searched online and through every resource I can think of, but can't get a clear picture of this area of the block. Are there any unused holes on the S14 block?

  • #2
    That hole sits just behind the power steering pump bracket and is unused on all of the engines I have seen. I have no idea why bmw built it into the casting.

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    • #3
      You may find this album useful for remembering how the internals go back together:
      https://www.flickr.com/photos/christ...57659294587724

      -chris
      1988 M3
      2007 Lotus Exige S

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      • #4
        Great pictures.

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        • #5
          Originally posted by christsay View Post
          You may find this album useful for remembering how the internals go back together:
          https://www.flickr.com/photos/christ...57659294587724

          -chris
          Wow! Awesome! Thank you so much!

          Comment


          • #6
            I am having the worst time finding torque specs for this engine. Wish Bentley just made a repair manual for these cars. The e-manuals just seem to be missing so much information.

            Does anyone know the torque specs for the timing chain slider bolts?

            realoem.com only shows 1 on the diagram but there is def 2. I have uploaded a pic of the bolt I am talking about as well as an arrow showing where the second one goes. I am assuming they both will have the same torque specs. But I can't find it anywhere.
            Attached Files

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            • #7
              I didn't use a torque spec but went "tight". I think they are M6 if that helps.

              The other slider is #21 in the attached. It holds the pipe that goes from the oil pump outlet up into the main oil galley.

              -chris
              Attached Files
              1988 M3
              2007 Lotus Exige S

              Comment


              • #8
                Oh ok. I was wondering why it wasn't on that other diagram. Makes sense now. I feel like that #21 would def need a specific torque since there is an o-ring in it.

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                • #9
                  The o-ring is in it's own recessed ring on the pipe, so once the pipe is fully flush against the block it won't compress anymore. I was worried about it being crushed but after taking a look at things it won't get smashed to a pancake.

                  Speaking of o-rings and timing gear, don't forget the two o-rings that go in the guide:
                  no o-ring! by chris tsay, on Flickr

                  -chris
                  1988 M3
                  2007 Lotus Exige S

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                  • #10
                    I actually just ordered those o-rings this morning. Haha.

                    Another simple question. Is the crank pulley nut reusable? Or will I need to buy a new one? On other engines I have worked on they are usually stretch bolts and have to be replaced every time they're removed.

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                    • #11
                      Iíve always reused the crank pulley nuts with no issue

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                      • #12
                        Originally posted by Broken88 View Post
                        I actually just ordered those o-rings this morning. Haha.

                        Another simple question. Is the crank pulley nut reusable? Or will I need to buy a new one? On other engines I have worked on they are usually stretch bolts and have to be replaced every time they're removed.
                        The 2.3 crank uses a nut...the 2.5 uses a bolt...not sure which you are building. At any rate, the 2.3 nut and the 2.5 bolt are both reusable.

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                        • #13
                          Awesome. Thanks guys.

                          Stupid questions. Should these o-rings (oil pump and timing chain guide) be installed dry, or have some time of dressing? Says nothing in the e-manual.

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                          • #14
                            I lubed them with some clean motor oil, seems a good idea for any o-ring.

                            -chris
                            1988 M3
                            2007 Lotus Exige S

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                            • #15
                              Great pics - many thanks!
                              sigpic

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