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About this blog

As we begin 2017, it's about time for me to do a "refresh" of my 1974 Turkis BMW 2002tii.  I bought this car, my third 02, in the year 2000 from a member of the Roadfly Forum (predecessor to this forum) from the drummer for a band in Dallas called The Old 97s.  I spent a ton of time and a lot of money to do pretty much a ground up restoration, including a total engine rebuild by the late Mike Perkins in Houston and a repaint in Glasurit Turkis (the original color).  

 

Fast forward 17 years, and around 75,000 miles, and it's time to take another look.  My general plan is around these areas:

 

1. Head:  I've started to experience a bit of blue smoke on the overrun, indicating that perhaps the valve guides/seals are worn.  I also have a bit of noise from the drive train that seems troubling, along with a bit of coolant leak.  At a minimum, I will take the head off and replace the head gasket, but likely will rebuild the head entirely.

2.  Cosmetic:  I need to repair a few rust spots as well as a dent in the trunk caused by a large floor jack I rented, and allowed to move around the trunk.

3.  "While I'm in there...." stay tuned....

Entries in this blog

Andy74tii

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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.....

Andy74tii

Well, finally retrieved my head from the machine shop, Area Machine in north Denver.  They did a great job....

 

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

 

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

 

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New valve guides put in....

 

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

 

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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.....

 

Andy74tii

Head Disassembly

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....

 

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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....

 

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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....

 

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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...

 

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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....

 

 

Andy74tii

Cylinder Head off...

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

 

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

 

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Let me know what you think...?

 

So, here is the head...

 

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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...

 

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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...

Andy74tii

Top Dead Center

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...

 

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

 

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

 

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

 

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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...

 

 

Andy74tii

Intake disassembly

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....

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

 

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

 

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

 

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Here's how the valve train looks...

 

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Done for now...

 

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Andy74tii

Potential head work

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....large.image1.jpeg

 

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...

 

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

 

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

 

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