[AT] 430V update

Spencer Yost yostsw at atis.net
Sun Jun 18 09:35:46 PDT 2017


I used Father's Day as an excuse to spend the morning working on the 430 instead of other things. I sucked out the penetrating fluid from the number one cylinder (with my mighty vac vacuum, another handy use for it).  And then got my inspection camera in the bore and found what appeared to be typical water infiltration. Wasn't any signs of damage, debris or anything like that.

But I was a little mystified. The muffler was on tight, no signs of rust in the muffler or piping and no signs there could be infiltration anywhere else.  No water in the oil or oil in the coolant.  There didn't appear to be any reason for the water at all. And then I found this.   Any water that ran down the muffler or ran off the hood into the exhaust pipe hole would have gotten through this rusted out spot in the manifold flange.

Mystery solved but the bore looked pretty rough.   The camera isn't perfect but I could see enough to see it wasn't just a little surface rust. 

I'm going to pull the manifold and head and pan.   I don't think force is the right thing for this situation.  Rings are bound to be stuck bad.

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Spencer Yost


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