The Ford Barn

Don · 10-31-2017, 05:30 PM

Drain tube didn't come on my 37 engine as original,as I have been reading but would.ike to put one there,any one know thread size in cap ?

Lawrie · 10-31-2017, 06:21 PM

Maybe 1/4 npt
Lawrie

Don · 10-31-2017, 06:29 PM

Nope,looks like 24 tpi. by 7/16, no sure tho

Talkwrench · 10-31-2017, 07:04 PM

Does anyone put that tube back on ??

Don · 10-31-2017, 07:15 PM

From what I read,it's not needed but it won't hurt to have it there,after oil pan was vented oil is not supposed to pressure out the rear seal or labrith ring,

flatheadmurre · 11-01-2017, 01:50 AM

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My thinking is that with it installed less oilfumes goes out to the clutch.
Blowby still goes out there and the vent without it, ford probably saved some money and it worked without it.
The heavy truck engines seems to have used it longer looking at the engines i break apart and some have a S shaped version with a checkvalve to prevent oil going out climbing steep hills.
I use them as i like the engineering idee of it.

scooder · 11-01-2017, 08:52 AM

I like um to, I believe the idea was to keep some of the Crankcase windage blowing oil in the slinger area out into the clutch housing.
Martin.

David J · 11-01-2017, 09:49 AM

This has been REALLY BEAT TO DEATH in the past here .

That said has anyone watched a V8 [ or whatever ] with a clear oil pan run as a demo ?

Why would you not want even a short one to keep some of that splashing oil OUT of the rear seal area ?

I only use actual 33-34 non-vented motors and it is definitely a help with those .

Brian · 11-01-2017, 10:28 PM

Don, just measured one up as best I could and believe it to be 1/2"x 32 TPI

David J · 11-02-2017, 09:08 AM

Pipe is for sure 1/2" with a wall thickness of .042" .

The pics blow up pretty good . [

QUOTE=Brian;1546909]Don, just measured one up as best I could and believe it to be 1/2"x 32 TPI[/QUOTE]

Mac VP · 11-04-2017, 06:20 PM

We have some that are essentially straight but with a slight bend at one end. The threads are confirmed as 32 tpi. The odd thing is that the bend is at the unthreaded end......opposite of the ones pictured above.

Don · 11-04-2017, 07:18 PM

Got one in mail today,your correct,32 tpi by about 1/2 but only 1 1/2 in long,would like to put a 45 on it and extend it below oil level.

David J · 11-04-2017, 07:34 PM

Solder a copper pipe onto it . The ones above are NOS

Jb corn · 11-04-2017, 09:04 PM

Don bring the one you have over to the shop ,we will make one any length.

10-31-2017, 05:30 PM	#1
Don Senior Member Join Date: May 2010 Location: Ashland KY Posts: 1,159	Rear main drain on 37 thread size Drain tube didn't come on my 37 engine as original,as I have been reading but would.ike to put one there,any one know thread size in cap ? __________________ DON P

10-31-2017, 06:21 PM	#2
Lawrie Senior Member Join Date: May 2010 Location: Qld, Australia Posts: 4,218	Re: Rear main drain on 37 thread size Maybe 1/4 npt Lawrie

10-31-2017, 06:29 PM	#3
Don Senior Member Join Date: May 2010 Location: Ashland KY Posts: 1,159	Re: Rear main drain on 37 thread size Nope,looks like 24 tpi. by 7/16, no sure tho __________________ DON P

10-31-2017, 07:04 PM	#4
Talkwrench Senior Member Join Date: Aug 2012 Location: Perth, Western Australia Posts: 2,687	Re: Rear main drain on 37 thread size Does anyone put that tube back on ?? __________________ *"Came too close to dying to stop living now!"*

10-31-2017, 07:15 PM	#5
Don Senior Member Join Date: May 2010 Location: Ashland KY Posts: 1,159	Re: Rear main drain on 37 thread size From what I read,it's not needed but it won't hurt to have it there,after oil pan was vented oil is not supposed to pressure out the rear seal or labrith ring, __________________ DON P

11-01-2017, 01:50 AM	#6
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Rear main drain on 37 thread size Sponsored Links (Register now to hide all advertisements) My thinking is that with it installed less oilfumes goes out to the clutch. Blowby still goes out there and the vent without it, ford probably saved some money and it worked without it. The heavy truck engines seems to have used it longer looking at the engines i break apart and some have a S shaped version with a checkvalve to prevent oil going out climbing steep hills. I use them as i like the engineering idee of it.

11-01-2017, 08:52 AM	#7
scooder Senior Member Join Date: Jul 2010 Posts: 2,593	Re: Rear main drain on 37 thread size I like um to, I believe the idea was to keep some of the Crankcase windage blowing oil in the slinger area out into the clutch housing. Martin.

11-01-2017, 09:49 AM	#8
David J Senior Member Join Date: Jun 2010 Location: St Croix Falls WI Posts: 2,080	Re: Rear main drain on 37 thread size This has been REALLY BEAT TO DEATH in the past here . That said has anyone watched a V8 [ or whatever ] with a clear oil pan run as a demo ? Why would you not want even a short one to keep some of that splashing oil OUT of the rear seal area ? I only use actual 33-34 non-vented motors and it is definitely a help with those .

11-01-2017, 10:28 PM	#9
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,834	Re: Rear main drain on 37 thread size Don, just measured one up as best I could and believe it to be 1/2"x 32 TPI __________________ Unfortunately, two half wits don't make a whole wit!

11-04-2017, 06:20 PM	#11
Mac VP Senior Member Join Date: May 2010 Location: Cincinnati, OH Posts: 1,361	Re: Rear main drain on 37 thread size We have some that are essentially straight but with a slight bend at one end. The threads are confirmed as 32 tpi. The odd thing is that the bend is at the unthreaded end......opposite of the ones pictured above. __________________ VANPELT SALES LLC Cincinnati, Ohio Office: 513-724-9486 www.vanpeltsales.com www.classictransmission.com

11-04-2017, 07:18 PM	#12
Don Senior Member Join Date: May 2010 Location: Ashland KY Posts: 1,159	Re: Rear main drain on 37 thread size Got one in mail today,your correct,32 tpi by about 1/2 but only 1 1/2 in long,would like to put a 45 on it and extend it below oil level. __________________ DON P

11-04-2017, 07:34 PM	#13
David J Senior Member Join Date: Jun 2010 Location: St Croix Falls WI Posts: 2,080	Re: Rear main drain on 37 thread size Solder a copper pipe onto it . The ones above are NOS

11-04-2017, 09:04 PM	#14
Jb corn Junior Member Join Date: Jun 2012 Location: St.rt. 141 Ironton Ohio Posts: 4	Re: Rear main drain on 37 thread size Don bring the one you have over to the shop ,we will make one any length.