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Categories: all aviation bicycle gadgets misc motorcycle theater Wed, 03 Mar 2010I did several more CL175 break-in runs tonight, and it's very likely I've done something wrong in my reassembly. The engine is coated with a thin film of oil, and the exhaust is a perpetual blue haze. The crankcase breather is dripping an unhappy looking mixture of water and oil, and has been blown half off its attachment point. The best guess I've got is that I messed up installing the piston rings, and got the top two swapped. That would mean that oil is not effectively removed from the cylinder walls and is getting into the combustion chamber, and combustion pressure is not adequately sealing the top ring against the wall. That would lead to positive pressure in the crankcase, which might be responsible for, oh, I don't know, oil seeping from every gasket. I guess I'll be taking the engine apart again to check on the piston rings. Not an auspicious beginning. But maybe my new valves will come in while I've got it apart, and I can send the head off to the shop. There's a reasonable chance that the valve guides are worn out, which could lead to some smoking, but not as much as I'm seeing (and especially not considering that the engine didn't smoke before). It is highly suspicious to me that only the left side sparkplug was oiled, and the left side is where I bent that intake valve. Hopefully I don't have multiple problems cascading upon each other! Back to the workbench, I guess. At least I'm not facing anything mysterious -- tearing down the engine is almost something I can do in my sleep at this point, and either the rings are in the right order, or they aren't. Of course, one mystery does remain: that clunking in the head is still there, exactly like before, and I still have no idea what's making it. Hooray for progress? Posted at 22:22 permanent link category: /motorcycle I took this picture of the CL175 today, and thought it was pretty cool. Figured I'd share.
Posted at 16:48 permanent link category: /motorcycle Categories: all aviation gadgets misc motorcycle theater Written by Ian Johnston. Software is Blosxom. Questions? Please mail me at reaper at obairlann dot net. |
