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  #1  
Old 08-04-2021, 02:15 PM
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jcarne jcarne is offline
 
Join Date: Jul 2016
Location: Worland, Wyoming
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Default Can you guys take a look at these borescope pics?

Hey guys, just did a 100 hour pmag inspection and borescoped the cylinders. The valves look superb! Can you guys tell me if the cylinder/pistons looks normal? Seems like there is a fair amount of what I'm assuming to be lead deposit on the pistons. Kind of surprised by this as I run LOP or peak anytime I cruise. Oil analysis has been dang good with virtually everything below universal averages. Oil consumption is 1-2 qt per 25 hours. Thanks in advance!

First pics are cylinder 1
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  #2  
Old 08-04-2021, 02:19 PM
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jcarne jcarne is offline
 
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Default

#2

Kind of got scared that might be a crack but looking at it for awhile seems like there is just a line where the different deposits meet.
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  #3  
Old 08-04-2021, 02:23 PM
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jcarne jcarne is offline
 
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#3

This cylinder runs well cooler than the rest if I am very much lean of peak. I usually enrichen to about peak to keep this one around 350 degrees in cruise. Looks like some of the deposits have come loose?
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  #4  
Old 08-04-2021, 02:25 PM
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#4

Here is #4 cylinder.
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  #5  
Old 08-04-2021, 02:34 PM
PilotjohnS PilotjohnS is offline
 
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Default 100 hours

You have 100 hours already? Congrats. Guess your wife wishes you were still building. Tell her the RV15 is coming out soon, that will make her happier.
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WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

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  #6  
Old 08-04-2021, 04:10 PM
gfb gfb is offline
 
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Which boroscope did you take these pics with? Pretty nice.
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  #7  
Old 08-04-2021, 04:31 PM
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jcarne jcarne is offline
 
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Quote:
Originally Posted by gfb View Post
Which boroscope did you take these pics with? Pretty nice.
Vivida VA-400. Can be had for about $210 bucks these days.
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  #8  
Old 08-04-2021, 04:45 PM
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Default Borescope

I'm no expert, but those look pretty clean to me.
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  #9  
Old 08-05-2021, 12:14 AM
KayS KayS is offline
 
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Default

here's a nice overview from AOPA of how the valves should look like...

https://www.aopa.org/-/media/Files/A...ster_Final.pdf
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  #10  
Old 08-05-2021, 04:33 AM
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Default

all good, keep on flying
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