<VV> Tear-down III (was Rebuild II)

[Kirby Smith]

I neglected to mention: Chrysilic acid eats organic 
material, including you.  Use extreme eye and skin caution 
and wash exposed rubber gloves as quickly as possible.

A metal container is required.  A water seal is needed on 
the top to keep the vapor under control.  Aluminum parts 
should be below the acid/water interface to minimize 
discoloration.

kirby


Kirby Smith wrote:
> Paint thinner will not disolve baked on carbonized residue.  I suggest 
> soaking the oil cooler in carburator cold parts cleaner (chrysilic [sp] 
> acid) for a while and then washing it out with water.  More than one 
> soak may be needed if there is significant passage blockage.
> 
> kirby
> 
> 
> Stephen Upham wrote:
> 
>> Last night, I began tear-down III.
>>
>>     I finally got the broken rocker cover bolt issue solved.  After 
>> carefully drilling out all of the old bolt, I was able to use a 
>> standard sized bolt (no re-threading or over sizing was necessary).  I 
>> attached a series of six super magnets in the deep oil pan and put 
>> another 65 lb. rated shop magnet on the end of the filter.  I put the 
>> oil in and used a drill attached to an old distributor shaft and 
>> placed hair driers (two) on the oil cooler and a curling iron between 
>> the cooler and the oil filter in order to heat the oil as much as 
>> possible in order to loosen as much of any hidden debris as possible.  
>> I ran this setup for two hours. The oil cooler adaptor became hot to 
>> the touch. I was hoping to find that all was well, but that's not what 
>> happened.
>>     After I drained the oil, I ran a magnet through the oil.  It came 
>> up negative.  I then took off the oil pan and that's when I realized 
>> that all was not well.  I found flakes (very few, but then how many 
>> would you want?) on the magnets.  It was when I used carb cleaner to 
>> clean the oil pan and then ran the magnet through the collected runoff 
>> that I really knew I was going to take the engine apart for a third 
>> time.  The iron debris were extremely fine, but it clumped around the 
>> end of the magnet like a ball. Most likely the debris came from the 
>> replacement oil cooler that I bought.  I thought I had throughly 
>> cleaned it by having a radiator shop put engine cleaner in it and then 
>> blow it out with a pressure hose, and then I put paint thinner in it 
>> and immersed it in hot water which caused it to spit the thinner back 
>> out.  I did this probably six or seven times alternating putting 
>> thinner in the cooler and shaking it back and forth until there were 
>> no more debris coming out; about fifteen times.  I also hand cleaned 
>> the front case cover and all of the oil passages.  Perhaps it came 
>> from the top case cover.         Regardless, I going to tear it down 
>> again and leave no stone unturned in removing every last bit of debris.
>>
>> On the positive side, I am getting pretty good at a tear down and 
>> reassemble.  I've almost got the torque ratings memorized. ggg
>>
>> Stephen Upham
>> Corvairium II
>