Quote:
Originally Posted by 50MercMetalHead
So, I’m looking at my block trying to understand and plan for the 95% mod and I noticed an interesting hole behind the oil pump drive gear. From what I can see, it just dumps straight back into the crankcase. I did some googling to try to see if other blocks had this hole and the one picture I saw showed one in that spot, but it was much different, like a drilled hole instead of the hole in my block which looks like it’s a chunk missing. If it matters, this is a 49-53 8CM. Thanks in advance.
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Although a little different shape, the two I looked at are the same.
Gives a place for residual oil in the valve chamber to drain back to the pan while providing a little lubrication to the gears.