CAM AND MAIN BEARINGS SHOT
This is what i mean when i say 340's have an issue with the bearings.
Whether half or full groove..the oil holes are too small and are only partially exposed
Here is a pic with red dots placed as bearing sit installed. They sit over the intersection of the cam and main feed and are smaller and misaligned. The misalignment is the main reason they need to be slotted. The 318 and 360 have a counter bore/bathtub at the oil feeds..so there is no misalignment and or partial blockage.
This is what i mean when i say 340's have an issue with the bearings.
Whether half or full groove..the oil holes are too small and are only partially exposed
Here is a pic with red dots placed as bearing sit installed. They sit over the intersection of the cam and main feed and are smaller and misaligned. The misalignment is the main reason they need to be slotted. The 318 and 360 have a counter bore/bathtub at the oil feeds..so there is no misalignment and or partial blockage.