[AT] 430V

[Spencer Yost]

Here are the borescope pictures I promised. The first is the top of the cylinder, the second is the bottom. As you can tell neither show a condition that is ideal; but the cylinder clearly is not a total wreck. In fact the pictures make it look much worse than it is to the naked eye. I highlighted the galvanic corrosion at the bottom of the piston skirt. It's not very visible but is obvious to the naked eye. At the top I highlighted what is fresh metal that showed up after the refrigerant trick and a small "pop" that sounded like a movement to me.

But look at the pics and I will let you be the judge.

PS: I think I have decided that pop was expansion/contraction and the fresh metal is the refrigerant boiling away rust flakes.

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Spencer Yost



Spencer Yost
> On Sep 11, 2017, at 1:57 PM, Steve W. <swilliams268 at frontier.com> wrote:
> 
> Spencer Yost wrote:
>> Sorry to reply to my own post, but I forgot to ask:  what is the oil
>> in the refrigerant? I'd like to know what that is. I think that would
>> make a very good penetrant. That stuff is _slick_.
>> 
>> 
>> 
>> Spencer Yost
> 
> 
> 
> Most automotive use is PAG 46 AKA Polyalkylene Glycol Viscosity 46
> SLIPPERY stuff.
> 
> It's available in a few viscosities.
> 
> -- 
> Steve W.
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