In the last "episode" of this buildthread I had disassembled the top end of the Evo motor to find out why the front cylinder was smoking and to fix an oilleak on the rear valvecover.
I found the bores of both cylinders were in pretty bad shape so had them honed to .010" oversize. The outsides of the cylinders also needed some love so I blasted them to bare metal,
painted them with Motip heatproof black and baked the painted cylinders for 1 hour at 160 degrees in my casting oven (as per the instructions) Much better!
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I mounted the cylinders on Cometic base gaskets by the way.
After inspecting the heads there was nothing wrong there so I just gave them the same paint treatment as the cylinders.
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I cleaned the valves, gave them a light grind and installed new valveseals. The headgaskets I used were multi-layer ones also by Cometic.
I set the torques on the headbolts according to the instructions from Cometic, which are different than the factory torque settings
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The valvecovers were cleaned and reassembled with
once again Cometic gaskets, changed the oilfilter for a fresh
one and now the engine is ready to go back in the frame! In the
next part I will replace the kickstarter crank for a one-piece
version and see if there is anything else that needs to be done. |
I also had the front drumbrake upgraded at Mascotte-Zuid
in Eindhoven and it is now working much better and no longer squeaking!
At Mascotte-Zuid they remachine the inside of the brakedrum, re-line
the brakeshoes and then grind them in the exact inner diameter
of the brakedrum, highly recommended! |
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