paulj1x
Member
I’ve been searching trying to find the coolant drain plugs in the block of my 99 LS1 without any luck. There are a series of equally spaced fully recessed bolts needing a 10 mm socket just above the oil pan, 4 on each side, the driver side one which is furthest back is just above the oil filter, then there’s one maybe 4 to 6 inches in front of this which is easy to get to, then another in front of this just behind the engine mount, then one in the front. I tried the easy one but it had a drop of oil on the end so it looks like this is for the oil galleys. There’s also a brass plug about the size of a quarter in the front which looks promising and another about an inch in diameter, this may be a freeze plug. I didn’t see anything else on the driver’s side, did I miss something?
paul
paul
