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Andy74tii

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Blog Entries posted by Andy74tii

  1. Andy74tii
    Well, top end rebuild done now, thanks to Mark Hutto, my great mechanic.  Running very well now, but we detected still a rattle potentially in the bottom end... but that is the next chapter.  Will drive for a bit to see how it goes, then determine next steps and whether a bottom end rebuild may be in my future.....
  2. Andy74tii

    Top Dead Center

    By Andy74tii,

    I wrestled with the exhaust side yesterday, removing the downpipe, but I could not quite get to two of the nuts under the manifold.  So, I'm going to take that off with the head, we'll see if that works....
     
    Moving on, I started to work on getting the engine to Top Dead Center.... I think I succeeded.  That is, after my bonehead move wherein I forgot to take the car out of gear and wondered why it was so hard to turn the engine..... ha
     
    Anyway, here is where I ended up with the marks:
     
    Here is the line on the timing chain sprocket against the oil bar...
     

     
    Here is the Kugelfischer pulley line with the timing cover mark....
     

     
    Here is the crank pulley notch lining up with the mark on the lower timing cover ....
     

     
    And here is the rotor pointing roughly in the direction of the notch on the distributor body....
     

     
    It does appear that both valves on #1 are closed when all these marks are aligned...
     
    Next step....take off the distributor, remove the tensioner, and deal with the crank pulley...
     
     
  3. Andy74tii
    Well, finally retrieved my head from the machine shop, Area Machine in north Denver.  They did a great job....
     

     
    My valves were getting worn and a little pitted on the top, so new valves were put in...
     

     
    New rocker arms, shafts, springs, washers, thrust washers, etc...
     

     
    New valve guides put in....
     

     
    They machined the upper timing cover to match....
     

     
    Now back to Mark (my mechanic) to put it all back together properly.  He is currently working on a 74 tii that has an S14 in it, but I'm right after that one.....
     
  4. Andy74tii

    Cylinder Head off...

    By Andy74tii,

    Well today I finally took the last steps to remove the cylinder head.... Here is what I found....
     

     
    To me, the head gasket actually looks pretty good... I really do not see any breaks in it....
     

     
    Let me know what you think...?
     
    So, here is the head...
     

     
    Thus far, I do not see any corrosion in the passages on the head, but will have it checked out... you might recall I found some of what looked like coolant drips on the exhaust manifold flange, which I suspected was either the head gasket break, or perhaps a cracked head.  Here is what it looks like it really was...
     

     
    Yes, a pretty nasty crack in the manifold... my question - can this be welded, or are tii manifolds available, barring repair?  
     
    More to come, comments are gratefully accepted...
  5. Andy74tii

    Head Disassembly

    By Andy74tii,

    I took a trip to my mechanic to talk about next steps in the process, and he gave me the option to disassemble the head, then take it directly to the machinist.  Since I don't have the "special BMW tool" to get all the rockers just right to slide out the shafts, I had to improvise....
     

     
    I used various size 3/8 extensions, a hex head to fit into the plugs on the front ends of the rocker shafts, and a medium sized hammer.  The one thing my mechanic said to be careful about was mushrooming the end of the shaft, which would then distort the rocker shaft journals.... I think I was careful enough to avoid that....
     

     
    This was my homemade tool to rotate the camshaft to get  the rockers to clear as I pounded the shafts out.  Worked pretty  well I think....
     

     
    This is the shaft plug that has a hex head on it.  I used a hex head socket to fit in that, so as to minimize the possibility of mushrooming...
     

     

     
    And there you have it.... I will leave the valves in and hopefully surface them and reuse with new guides and seals.  New rocker arms, shafts, hardware, head gasket, and I should be in business....
     
     
  6. Andy74tii

    Potential head work

    By Andy74tii,

    I'm going to be disassembling the head first... I think I may have a bad head gasket, based on the fact that I do see some greenish deposits on the exhaust manifold, coupled with some coolant loss in general....
     
    The engine compartment looks pretty good in general and the car is running well, but I do need to get that head off to take a look...
     

     
    The paint in general has held up pretty well over 17 years...
     

     
    Well, except for the ding I caused by hauling around a large transmission jack in the trunk....
     

  7. Andy74tii

    Intake disassembly

    By Andy74tii,

    Well, I started disassembling the intake side today.... I did this a few years ago when I had the intake pieces powder coated, and I also refreshed 3 of the 4 fuel lines.... I suspect the #1 line is still NLA, which is crazy....


     
    First I removed the airbox and disconnected the battery....
     

     
    Now, remove the intake pipes, leaving the part that holds the injectors (note, these were pure white a couple years ago...
     

     
    This is a clip that often goes missing on these cars...
     

     
    Here's how the valve train looks...
     

     
    Done for now...
     

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