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GLS550 M278 borescope cylinder pictures

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Old 05-28-2024, 04:29 PM
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GLS550 M278 borescope cylinder pictures
Hey guys. Picked up a 95k GLS550 and had a friend take his borescope to it while we were doing spark plugs. I have searched for m278 scoring pictures and everything I have found has shown some severe scoring so I wanted to get your opinions on the pictures from my cylinders.





















Thanks,
Dan
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Old 05-28-2024, 10:03 PM
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Are you blowing oil or having excessive usage?
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Old 05-28-2024, 10:28 PM
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Thankfully none that i have noticed yet in the ~2k miles i have had it. Also haven't been babying it either.
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Old 05-29-2024, 07:42 AM
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I would stay on top of oil changes and either not get an ECU tune or get rid of it if you have one. Also, I would not drive overly aggressively.
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Old 05-29-2024, 07:58 AM
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This sure looks to dispell the rumor that the M278 got Iron cylinder liners in late 2015/early 2016
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Old 05-29-2024, 09:08 AM
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Do these pictures look concerning to the expert eyes here? I am going to go in with the borescope again with better position while turning the engine a bit.

it surely didn’t help to find lots of sand in crevices of the engine bay. The air filters were disgusting on top.


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Old 05-29-2024, 09:18 AM
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Photos shows signs of a poorly maintained vehicle.
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