Thursday, November 22, 2012

Partially baffled?

My '47 Chief engine is totally disassembled now. Before I start to reassemble the bottom end, I might
need to do some case repair...

The baffles under the front cylinder flange are about 1/4 missing on the left case half, and about 2/3 missing on the right case half:

The baffles in the rear cylinder are umdamaged, except that they appear to have minor manufacturing defects (rough edged holes) on either side:


The engine was previously rebuilt, and has run without the baffles. In other words, no sign of the broken off pieces.

Anybody know how important is it to restore these baffles? Now would be the time, and I can try to find somebody local who can do it, but it it makes no difference, I would just as soon let it slide...

2 comments:

  1. Interesting. I suppose it might cause oil to sling into that cylinder and foul plugs or smoke.

    I wounder how it happened. Connecting rods slapping around when the top end was a part sometime in it's past life maybe?

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  2. Over on the Virtual Indian Blog, this question has generated a plethora of responses. Seems kinda like a majority opinion might be that modern oil rings will compensate for any extra oil slung up onto the cylinder walls, and may help cool the front cylinder. For reasons I have yet to understand, the front cylinder on an Indian tends to run significantly hotter than the rear.
    I'm gonna try it without the baffles, because I am more comfortable avoiding any unnecessary welding on the cases.

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