Cheap boresope for Xmas - cylinder porn GM truck and Kohler v twin

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I got a $40 boresope from Amazon for Xmas, it connects to your phone over WiFi. Works pretty well, other than the mirror attachment gives pretty poor quality.
Here's some pics I just took of my 216k mile/9600 hour 2005 gm LS V8 and my 2007 Kohler 23hp v twin with 315 hours. The flat tops are the truck and the dished are the lawn tractor.
The last few pics are stuck down the oil filler on the truck. That's the passenger side valve cover (non pcv), I had pictures up of the driver's side when I replaced the sludged up valve cover/pcv on that side.
I'll post what the borescope model is if anyone is interested, jist getting ready to go donate blood.
 

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350Rocket

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835 looks like it chewed on something for a few strokes
I agree. Wish I knew which cylinder was the one with 15% leakage. The rest were all about 5% I was told.
I will eventually scope all 8. The first one was almost at TDC so I checked one more and then had to get the truck out of the garage to do an oil change on my sister's 05 Camry.
 
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I agree. Wish I knew which cylinder was the one with 15% leakage. The rest were all about 5% I was told.
I will eventually scope all 8. The first one was almost at TDC so I checked one more and then had to get the truck out of the garage to do an oil change on my sister's 05 Camry.
try a half dose of 8 cyl engine restore.
 

350Rocket

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This is the borescope. Looks like the price has gone up since I looked at it last.
 

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350Rocket

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Any comments on the vertical stripes visible in the first several pics (the Kohler tractor engine)? They show up constantly while taking video, so doesn't seem to be a trick of the light or anything.
 
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Any comments on the vertical stripes visible in the first several pics (the Kohler tractor engine)? They show up constantly while taking video, so doesn't seem to be a trick of the light or anything.
If it runs good… my comments would be, ignore it. Maybe check the air filter, but there is no way knowing if this wasn’t from initial assembly or run-in.
 

350Rocket

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Yes, and this is routine. It’s a tribute to the excellent motor oils we have now. It used to be that cylinder walls were typically so worn that a ridge reamer had to be used to to remove enough material at the top of the cylinder to remove a piston. Not required any more.
And this engine went the first 190k miles on bulk conventional. The first 120k or so was going until the olm was at zero or just beyond (which takes until about 4.5-6k miles) then after that it was 3-4k max on conventional.
When I got it I switched to full synthetic every 3-4k but by that time the pcv had been plugged since around 140k (intermittent smoke on startup from oil sucking into the throttle body).

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350Rocket

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If it runs good… my comments would be, ignore it. Maybe check the air filter, but there is no way knowing if this wasn’t from initial assembly or run-in.
I didn't plan on doing anything (already replaced the air filters), was just curious at what I was looking at. I was wondering if fuel wash could cause that (engine is carbureted with manual choke and very cold blooded the few times I started it late in the season). I try to get off the choke as soon as possible but it likes to die. Nothing like the electric choke in my Oldsmobile (the one I really want to see with the borescope but it's buried under covers for the winter).
 
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I didn't plan on doing anything (already replaced the air filters), was just curious at what I was looking at. I was wondering if fuel wash could cause that (engine is carbureted with manual choke and very cold blooded the few times I started it late in the season). I try to get off the choke as soon as possible but it likes to die. Nothing like the electric choke in my Oldsmobile (the one I really want to see with the borescope but it's buried under covers for the winter).
Now you have me shopping for one. My atv got real cold blooded after its carb rebuild, carb failed and I had a lot of gas in the oil, and now that borescope sounds like something I just gotta have…
 
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