Hey all,
i have recently picked up a 2000 Blazer 4.3L automatic.
car came with broken Intake Gasket and it still ran before i picked it up.

anyways, i changed the intake gasket and finally adjusted the timing on the distributor properly so it could start (that took a day or so of troubleshooting, 1st time for me). now before i leave it running for a longer period ( of course i did put new oil) i want to do a coolant flush..
that being said the rad was missing a bottom plug so i picked one up at a parts store. the thing is that the drain plug wont go in.. no matter how hard i try.

the plug is correct, it just wont go in. ill try to see if maybe an o-ring from previous plug got stuck in there?

any suggestions are greatly appreciated.