New rebuild borescope has me shook
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
(couldn't find the edit button)
Synthetics are too slippery, and if used for break-in, have a very very high chance of glazing your cylinder walls instead of letting the rings seat... in this case, the seating of rings does remove metal... because neither the rings nor the cylinder walls are perfectly matched.. so .. some metal has to be removed.. and if the oil is too slick... it doesn't happen.. so the micro gaps in the ring/wall interface allow the oil to ride up the wall and be burned during ignition.
Synthetics are too slippery, and if used for break-in, have a very very high chance of glazing your cylinder walls instead of letting the rings seat... in this case, the seating of rings does remove metal... because neither the rings nor the cylinder walls are perfectly matched.. so .. some metal has to be removed.. and if the oil is too slick... it doesn't happen.. so the micro gaps in the ring/wall interface allow the oil to ride up the wall and be burned during ignition.
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Intermediate
Joined: Apr 2017
Posts: 37
Likes: 6
From: Michigan
(couldn't find the edit button)
Synthetics are too slippery, and if used for break-in, have a very very high chance of glazing your cylinder walls instead of letting the rings seat... in this case, the seating of rings does remove metal... because neither the rings nor the cylinder walls are perfectly matched.. so .. some metal has to be removed.. and if the oil is too slick... it doesn't happen.. so the micro gaps in the ring/wall interface allow the oil to ride up the wall and be burned during ignition.
Synthetics are too slippery, and if used for break-in, have a very very high chance of glazing your cylinder walls instead of letting the rings seat... in this case, the seating of rings does remove metal... because neither the rings nor the cylinder walls are perfectly matched.. so .. some metal has to be removed.. and if the oil is too slick... it doesn't happen.. so the micro gaps in the ring/wall interface allow the oil to ride up the wall and be burned during ignition.
ok. I just figured since cvo comes with syn it was fine. So what you think 300 miles just drain everything I can and go dyno for awhile?
Stellar HDF Member
Joined: Feb 2016
Posts: 2,066
Likes: 259
From: Northstreet, michigan
i I thought the same way with my lrs. Ran syn3 for original break in, and 117 upgrade
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Intermediate
Joined: Apr 2017
Posts: 37
Likes: 6
From: Michigan
after reading and reading I think was he's saying is the big difference is the factory engines are all assembled and engineered by one designer but with a build I'm using wiseco pistons on bored out jugs so while the tolerance is negligible that's probably what it is. I'll change to dyno for now and after a min mist some water in the intake to try to take out that carbon
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Intermediate
Joined: Apr 2017
Posts: 37
Likes: 6
From: Michigan
either way Scott from hillside looked at all of it so did my local harley tech. Nothing to worry about was both their opinions
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