anyone had success with using a borescope to see Cam Marks so not have to remove Valve Cover and disturb it's famously notorious to leak Cover seal?

Yes, searched first. If this is covered in a thread you know off... please send me in the right direction.

Appreciate in advance

https://youtu.be/AyZmbXmjXio?si=_EHpXLp28lvOHs3O&t=396

__________________
"Know other lessons I need to learn? TELL me. Tired of learning'em the hard way".

Glow Plug Wait: [i} Time of silence in homage Rudolph Diesel. Longer you own a diesel. more honor you give". [/i]

Life; SNAFU Situation Normal All Fouled Up, & FUBAR: Fouled Up Beyond All Repair

-Now: Snafued Jeep TJ w/OM617 2Be daily driver & building SS M1079 w/Ambo boxed /live in Adv. Truck, Diesel KLR conversion
-Sold 62 UNIMOG Camper w/617 Turbo, 85 300SD

Highly unlikely that could be successful

What are you working on? It might be doable but if the purpose is to check valve timing precisely I don't think the angle of view would be sufficiently precise.

__________________
"Rudeness is a weak man's imitation of strength" - Eric Hoffer

ruff look to verify that all things pretty much appear to be lined up showing IP is at Baseline setting at least. AKA cam gear mark & tower ruffly aligned- while everything else is lined up (RIV Blade Centered, Harmonic Balancer Marks at 15ish, Marks on outside IP aligned w/ Front case. )

or could tell one if chain has chance of stretch. Won't tell ya how much stretch. or how many teeth off . but thinking it should offer enough input on if one should investigate deeper.

__________________
"Know other lessons I need to learn? TELL me. Tired of learning'em the hard way".

Glow Plug Wait: [i} Time of silence in homage Rudolph Diesel. Longer you own a diesel. more honor you give". [/i]

Life; SNAFU Situation Normal All Fouled Up, & FUBAR: Fouled Up Beyond All Repair

-Now: Snafued Jeep TJ w/OM617 2Be daily driver & building SS M1079 w/Ambo boxed /live in Adv. Truck, Diesel KLR conversion
-Sold 62 UNIMOG Camper w/617 Turbo, 85 300SD

What are you working on?

__________________
"Rudeness is a weak man's imitation of strength" - Eric Hoffer

617. Got a couple threads at top of this Diesel Forum that hits on my escapades. aka:

The ol "... if it twere a snake it ta'would'a bit t'ya situation.

__________________
"Know other lessons I need to learn? TELL me. Tired of learning'em the hard way".

Glow Plug Wait: [i} Time of silence in homage Rudolph Diesel. Longer you own a diesel. more honor you give". [/i]

Life; SNAFU Situation Normal All Fouled Up, & FUBAR: Fouled Up Beyond All Repair

-Now: Snafued Jeep TJ w/OM617 2Be daily driver & building SS M1079 w/Ambo boxed /live in Adv. Truck, Diesel KLR conversion
-Sold 62 UNIMOG Camper w/617 Turbo, 85 300SD

I have not used any for that purpose but I don't see why not...and it's a handy thing. You don't need a fancy one , the cheapest rifle borescope would work,they have LED lights ,plug into a smartphone or tablet...just tape/ziptie securely to a flexible/adjustable magnetic pickup tool for easier "navigation".

I tried. its a NO Go. Someday I will learn how to weld aluminum. or if I take this one off I will measure out best I can where a port in the Valve Cover would go; then have an Aluminum bung welded in and install a brass or aluminum cap there. tada. Easy check port.

__________________
"Know other lessons I need to learn? TELL me. Tired of learning'em the hard way".

Glow Plug Wait: [i} Time of silence in homage Rudolph Diesel. Longer you own a diesel. more honor you give". [/i]

Life; SNAFU Situation Normal All Fouled Up, & FUBAR: Fouled Up Beyond All Repair

-Now: Snafued Jeep TJ w/OM617 2Be daily driver & building SS M1079 w/Ambo boxed /live in Adv. Truck, Diesel KLR conversion
-Sold 62 UNIMOG Camper w/617 Turbo, 85 300SD