The Ford Barn

CatMan1 · 08-24-2021, 01:52 PM

What is the Oil Drain Tube Length supposed to be? I'm overthinking this, but while I have it apart I'm checking everything! My car is a '28.

katy · 08-25-2021, 12:12 PM

Does this help? Source unknown.

CatMan1 · 08-25-2021, 12:29 PM

Quote:

Originally Posted by katy

Does this help? Source unknown.

Perfect! Thanks!

Benson · 08-25-2021, 03:29 PM

Maybe it is just the camera angle BUT

1. A new repro drain tube measures 4 inches end to end with 1/4 inch of threads.

2. I measured 10 or 12 used main caps with drain tubes.

They measure between 3 3/4 to 3 7/8 when installed and measured as in photo in post #2.

Early '28 cars had 5/16ths tubes later cars used 3/8ths tubes

aermotor · 08-25-2021, 03:56 PM

Quote:

Originally Posted by katy

Does this help? Source unknown.

It sorta appears that tube is spot welded in place. Maybe threads were stripped, pushed in more and spot welded?

John

chrs1961815 · 08-25-2021, 06:22 PM

Sponsored Links (Register now to hide all advertisements)

The original style is threaded in - some new caps and rebuilders like antique engine rebuilding weld/braze their tubes in place as they are a pressfit I believe.

Dan McEachern · 08-27-2021, 05:35 PM

More important than the length is to make sure the tube is not screwed so far into the cap as to block or partially block the tube . I ALWAYS notch the threaded tube end on the side opposite the dogleg to make sure its as open as possible. The tube is not a press fit- it is threaded into the cap. Nothing wrong with a dab of braze to keep it from unscrewing.

Gold Digger · 08-27-2021, 06:39 PM

The thing is, don't try and braze it on a good running bearing, it will melt the Babbitt.

katy · 08-28-2021, 09:14 AM

Quote:

Originally Posted by Dan McEachern

I ALWAYS notch the threaded tube end on the side opposite the dogleg to make sure its as open as possible.

Good idea!

08-24-2021, 01:52 PM	#1
CatMan1 Senior Member Join Date: Jun 2021 Location: Pella, IA Posts: 334	Drain Tube Length What is the Oil Drain Tube Length supposed to be? I'm overthinking this, but while I have it apart I'm checking everything! My car is a '28.

08-25-2021, 03:29 PM	#4
Benson Senior Member Join Date: May 2010 Posts: 2,594	Re: Drain Tube Length Maybe it is just the camera angle BUT 1. A new repro drain tube measures 4 inches end to end with 1/4 inch of threads. 2. I measured 10 or 12 used main caps with drain tubes. They measure between 3 3/4 to 3 7/8 when installed and measured as in photo in post #2. Early '28 cars had 5/16ths tubes later cars used 3/8ths tubes Last edited by Benson; 08-25-2021 at 03:52 PM.

08-25-2021, 06:22 PM	#6
chrs1961815 Senior Member Join Date: Jul 2018 Location: Spring Grove, Illinois Posts: 1,371	Re: Drain Tube Length Sponsored Links (Register now to hide all advertisements) The original style is threaded in - some new caps and rebuilders like antique engine rebuilding weld/braze their tubes in place as they are a pressfit I believe. __________________ "The more things change, the more they stay the same."

08-27-2021, 05:35 PM	#7
Dan McEachern Senior Member Join Date: Aug 2010 Location: SF Bay Area Posts: 193	Re: Drain Tube Length More important than the length is to make sure the tube is not screwed so far into the cap as to block or partially block the tube . I ALWAYS notch the threaded tube end on the side opposite the dogleg to make sure its as open as possible. The tube is not a press fit- it is threaded into the cap. Nothing wrong with a dab of braze to keep it from unscrewing.

08-27-2021, 06:39 PM	#8
Gold Digger Senior Member Join Date: Nov 2011 Location: Arkansas & Alaska Posts: 643	Re: Drain Tube Length The thing is, don't try and braze it on a good running bearing, it will melt the Babbitt.

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