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accessing front cylinder
In order to be able to turn the crank shaft the central lid
needs to be unsrewed. Rumours are this will never turn. In my case
I needed a chisel to remove the piece. Now, I will have to order a
new one for replacement :-(
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The cover over the valves comes off easily. Same for the outer sparkplug. These are
still the first sparks after almost 60 000 miles. The gap at the eletrodes
is about 1.5 mm. Time to check the valve adjustment. This was never checked
during operation. It is 0.2 and 0.1 at the inflow and 0.2 at the outflow.
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This is also an oportunity to check the tensioner of the cam shaft chain.
The blocking wedge extends 3 mm above the top (should be less than 6).
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I removed the second spark only after the valve cover came off because
it is now easier to be accessed.
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The crank shaft should be on the FT mark by now since we checked
the valve adjustment. The cam shaft should have the top mark showing
upright (to be seen between the chain wheel and the cam shaft bearing).
The marks on the chain wheel are in line with the top edge of the cylinder
head.
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Even the chain has a color mark but I don't think it is important to have
the chain in the same position.
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The position of the cam shaft chain before dismantling.
The valves are already gone. 5 screws! This should better be done
later after loosening the chain wheel, but I didn't know better.
Note the position of sleeves when removing valves!
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Watch how to fix the tensioner by poking a 2mm nail through the little hole.
Watch the position of the sleeve when taking off the cam shaft bearing.
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I found it not
possible to get the chain off without removing the chain wheel.
The two screws of the chain wheel were very tight. I will need new ones
because the head got a little damage. The cam shaft is blocked with a
screw driver to prevent it from turning
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Cam shaft is gone. The chain is secured from falling into the engine.
Before opening the cylinder watch the small screw (Allen screw)
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The nuts on the cylinder bolts need a big wrench! And they will be
replaced because of damage from the wrench.
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Valves from underneath look good.
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The same procedure for the aft cylinder. Measured valve play is
0.2 at outflow and 0.15 at inflow.
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