bore scopes and inspection cameras come at various price points and quality..
gives a peek at internal damage without removing head.
sometimes piston damage can be seen peering through plug hole using bright light.
Remove rocker cover, observe valve stem/train operation while rotating engine counter clockwise by hand.
are all stems rising the same amount? are any stuck?
Good time to spread a table spoon or two of engine oil on cylinder walls by adding it through plug hole.
gives a peek at internal damage without removing head.
sometimes piston damage can be seen peering through plug hole using bright light.
Remove rocker cover, observe valve stem/train operation while rotating engine counter clockwise by hand.
are all stems rising the same amount? are any stuck?
Good time to spread a table spoon or two of engine oil on cylinder walls by adding it through plug hole.
