Suntzuzuki Posted June 11, 2020 Report Share Posted June 11, 2020 (edited) So I finally got my rebuild done, engine is in, everything is connected and looking beautiful! I fill the radiator up with water for the break in and it starts pouring out of the side of the block...after a mild heart attack I realized the coolant plug was missing from the block. It was in when I took it to be boiled out and just overlooked making sure it was there when I got the block back. Long story long...what do I need to put in there, I can't find the proper plug on line dang it! Edited June 11, 2020 by Suntzuzuki 1 Quote Link to comment
datzenmike Posted June 11, 2020 Report Share Posted June 11, 2020 I assume this is for a 521? L series? Well the 521 L16 has different part numbers for it's core plugs than all other L16/L18/L20Bs. Its 11023-58000 or 00933-14000 and fit the 521 L16 All other L16s like in the 510 and the early 620 and all other L18 and L20Bs are 11021-21000. 2 Quote Link to comment
banzai510(hainz) Posted June 11, 2020 Report Share Posted June 11, 2020 Aurosport took to out? and didn't put it back? 1 Quote Link to comment
Suntzuzuki Posted June 11, 2020 Author Report Share Posted June 11, 2020 1 hour ago, banzai510(hainz) said: Aurosport took to out? and didn't put it back? That's what it seems like. I am going to call them and ask, I bet they have about 657 laying around. 1 Quote Link to comment
Suntzuzuki Posted June 11, 2020 Author Report Share Posted June 11, 2020 12 hours ago, datzenmike said: I assume this is for a 521? L series? Yes it is! Thanks, Mike. 1 Quote Link to comment
Stoffregen Motorsports Posted June 11, 2020 Report Share Posted June 11, 2020 It doesn't sound like the OP is referring to the freeze plugs, but the threaded block drain plug. It is possible, easy even, to tap that to NPT and use a plug from the hardware store. 2 Quote Link to comment
datzenmike Posted June 11, 2020 Report Share Posted June 11, 2020 They are core plugs. Yes, the block drain above the starter.... 08931-30410.... used in all L Z SD and A series engines 2 Quote Link to comment
Suntzuzuki Posted June 11, 2020 Author Report Share Posted June 11, 2020 Thanks, Mike! 1 Quote Link to comment
gene knight Posted June 12, 2020 Report Share Posted June 12, 2020 anyone got have these lying around i need a few for my L16 and L18/L20 b motors sitting in my garage Quote Link to comment
Crashtd420 Posted June 12, 2020 Report Share Posted June 12, 2020 Looks like you can still get them at the dealer.... Basically a 1/4 bspt plug.... As said before the hole can be tapped as a 1/4 npt, which can be found a lot easier.... no need to redrill just run the tap in and use the npt plug as a gauge.. 1 Quote Link to comment
datzenmike Posted June 12, 2020 Report Share Posted June 12, 2020 I might be wrong but they might be brass? 1 Quote Link to comment
Stoffregen Motorsports Posted June 12, 2020 Report Share Posted June 12, 2020 I think some of them were brass, but definitely not on later engines. 1 Quote Link to comment
Stoffregen Motorsports Posted June 12, 2020 Report Share Posted June 12, 2020 21 hours ago, datzenmike said: They are core plugs. Core plugs, freeze plugs Poutine, soggy fries 1 2 Quote Link to comment
datzenmike Posted June 13, 2020 Report Share Posted June 13, 2020 I actually saw a block in a wrecking yard with a 3"" long frozen dong hanging out with a core plug on the end. I was afraid to touch it. 2 Quote Link to comment
datzenmike Posted June 14, 2020 Report Share Posted June 14, 2020 This is supposed to be an L16 620. TI think my '76 710 is brass looking. 1 Quote Link to comment
Stoffregen Motorsports Posted June 14, 2020 Report Share Posted June 14, 2020 Sure looks like brass from here, but maybe it's part of the camouflage you got on your engine. It could just be rusty. 1 Quote Link to comment
thisismatt Posted June 14, 2020 Report Share Posted June 14, 2020 Is that a Quaker State ad? 1 Quote Link to comment
datzenmike Posted June 14, 2020 Report Share Posted June 14, 2020 Not mine. I checked just now and rusty. 1 Quote Link to comment
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