An ounce of prevention is a good rule of thumb on replacing core plugs. If you're not 100% sure, it's cheap insurance and they're much easier to replace before you stick the engine back in the truck. smile


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)