newtoboat101
Chief Petty Officer
- Joined
- Jul 9, 2015
- Messages
- 407
swapping merc 5.0lx 1988 /alpha 1 gen 1 to a new gm 5.7 base engine ,my question is there are several holes near oil filter ,one hole, directly above oil filter , is factory plugged, why? then i have two holes with threads on them ,one is above factory plugged, then the other is near the 5 spark plug hole, now on my old motor i did not have all these holes ,only hole i had is where low pressure alarm system went into ,do i plug these extra holes, or plug open holes and use factory plugged hole for alarm pressure switch ,any help appreciated ,at work so no pics till later,if you need to see