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  #1  
Old 04-03-2021, 02:46 PM
TShort TShort is offline
 
Join Date: Jan 2005
Location: Indianapolis, IN (KUMP)
Posts: 1,063
Default How do my exhaust valves look?

I'd like input from those with experience.

Lycoming IO-540 D4A5 in my RV-10. 315 tach hours since new.
Compressions fine all >70/80 cold. Runs fine no issues. I run LOP when on XC flights but otherwise ROP. CHTs generally well less than 400, though they will approach 400 on takeoff on a hot day.

I'm interested to see what people think of the borescope pics from annual this year (taken today). They are presented in order, cyl 1 to 6:


The only one that looks odd to me is #1, but I am not sure what to make of it.

Thanks in advance for any input.
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__________________
Thomas Short
KUMP - Indianapolis, IN / KAEJ - Buena Vista, CO
RV-10 N410TS bought / flying
RV-8 wings / fuse in progress ... still
1948 Cessna 170 N3949V
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  #2  
Old 04-03-2021, 02:57 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 5,876
Default

The look pretty consistent, Tom. That #1 appears to have some oil on the seat that wicked into the surface deposits.
__________________
Bill

RV-7
Lord Kelvin:
I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.
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  #3  
Old 04-03-2021, 03:59 PM
TShort TShort is offline
 
Join Date: Jan 2005
Location: Indianapolis, IN (KUMP)
Posts: 1,063
Default

Thanks, Bill.

I thought 1 looked different but it didn't look like any of the "bad" valves I've seen. Oil seepage would explain that irregular appearance.

The plugs are still out, I may try and shoot a couple better pics.

Thomas
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Thomas Short
KUMP - Indianapolis, IN / KAEJ - Buena Vista, CO
RV-10 N410TS bought / flying
RV-8 wings / fuse in progress ... still
1948 Cessna 170 N3949V
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  #4  
Old 04-05-2021, 07:18 AM
ShortSnorter ShortSnorter is offline
 
Join Date: Dec 2013
Location: NOLA
Posts: 299
Default

What type of borescope did you use to capture the images?
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