Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power

Engine Marine/Industrial 4.3L 6-65
11. Remove the front oil gallery plugs or balls from the front of
the engine block and discard.
12. Insert a 3/8 x 26 in. rod into the rear oil gallery holes in order
to drive out the front oil gallery plugs or balls.
13. Remove the engine block core hole plugs.
13.1. Use a suitable tool in order to drive the engine block
core hole plugs into the coolant jacket.
13.2. Use a suitable tool in order to pull the engine block
core hole plugs from the coolant jacket.
13.3. Discard the engine block core hole plugs.
5270
14. Remove the oil filter bypass valve and discard.
480550
188026
2000 Marine/Industrial