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Benson · 11-14-2021, 12:10 PM

Berts has both sizes of drain tubes...

https://modelastore.com/index.php?ro...&category_id=0

NOTE: Most main caps I see have a SMALL tack weld so it will not fall off.

You have to be sure when gas welding or brazing not to melt the babbit in the main cap.

Maybe an engine builder will comment on whether Mig or Tig is better.

11-14-2021, 12:10 PM	#3
Benson Senior Member Join Date: May 2010 Location: Central Highlands, Cen~Col Posts: 2,896	Re: Oil Drain Tube Thread Size Berts has both sizes of drain tubes... https://modelastore.com/index.php?ro...&category_id=0 NOTE: Most main caps I see have a SMALL tack weld so it will not fall off. You have to be sure when gas welding or brazing not to melt the babbit in the main cap. Maybe an engine builder will comment on whether Mig or Tig is better. Last edited by Benson; 11-14-2021 at 12:31 PM.