Oil Drain Tube Thread Size
- Thread starter dmaxweb
- Start date
Glenn Thoreson
Senior Member
Ford used two different sizes of these tubes. The one the vendors have is the later version meant to cure a problem with clogging, etc. You may have to search for a used one or drill and tap the cap for the larger tube.
Berts has both sizes of drain tubes...
https://modelastore.com/index.php?route=product/search&search=drain tube&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.
https://modelastore.com/index.php?route=product/search&search=drain tube&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:
dmaxweb
Well-known member
I checked with Steve and the 3/8" tube has 3/8-32 thread not pipe thread.
Ora at Schwalms recommended red loctite.
The most important is still the gas welding stage, right?
BRENT in 10-uh-C
Well-known member
Steve is correct. Just for clarity, the early A-6325-AR Cap's hole was threaded 5/16-32.
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