CORRECT BOLT LENGTH
Many older, inline engines have water pump bolt holes that go all the way through the front of the block and can easily contact the front cylinder, if the incorrect bolts are used. I have seen a few engines ruined from having the incorrect length bolts pressed against the outer cylinder wall. It’s important to verify that there is bolt to cylinder clearance or add this to the required check list if the customer is assembling the engine’s accessories.  

Dave Matton 
D and D Auto Machine 
Bloomington, MN
JULY, 2023