The Ford Barn

hotrodjay · 06-22-2017, 08:45 PM

37-41 lower rear main seal out of the package.

hotrodjay · 06-22-2017, 08:48 PM

Side view of the lower rear main slinger seal for 37-41 flathead.

hotrodjay · 06-22-2017, 08:49 PM

Ok so I figured out how to posts pictures finally...my error. Here they are...what do you y'all think?

hotrodjay · 06-22-2017, 08:52 PM

I did...lol, thanks for your patience.

hotrodjay · 06-22-2017, 08:53 PM

What do I have here?...lol

hotrodjay · 06-22-2017, 08:54 PM

Sponsored Links (Register now to hide all advertisements)

Late 36 early 37? Does my rear main cap differ from a 37? Do I have a 36 cap on my 37?

hotrodjay · 06-22-2017, 09:02 PM

While y'all are trying to help me I figured I'd brows some other posts and see if I can help someone else to return the favor😉

flatheadmurre · 06-23-2017, 12:06 AM

A little suprised no one mentioned you are missing a piece of pipe on the cap...
The idee is to get the oilreturn below the oillevel of the engine to prevent blowby going out the rear mainseal.
Looks like you have a mix of a single and double singer seals.

hotrodjay · 06-23-2017, 01:27 AM

I know about the drain pipe, ford canceled that in early 35 due ti the crank case ventilation system. Question is does this particular main cap have a lower seal or not? If my engine is a late 36/early 37...maybe there is no seal. Is there a seal for this cap or not? Ready to install the pan but need a definite answer. Again...there was no drain pipe from 37-41. None from 41-48. Does my main cap fit a slinger seal or not? Maybe my 37 is an earlier model where a lower slinger seal didn't exist like the 36. Guess I have an early 37...36 had no seal at the main cap. I'll put it back together the way it was.

Brian · 06-23-2017, 01:29 AM

Your rear cap certainly resembles the type found on a 36 engine. Every 37 engine I've seen has the insert that you picture elsewhere. Thing is with these old Fords, nothing is ever totally black and white....it would appear that at least one [yours] 37 engine was produced with the earlier style rear cap. No worries, use it as is in conjunction with the inserted upper die cast piece in t5he block. It'll work....and, you don't need the oil return pipe the above poster alludes to. That item was discontinued in 1935.

Brian · 06-23-2017, 01:32 AM

Mate, you're a faster typist than me! My answer is the definitive answer you seek, and you are correct! Bolt it up and run it! Good luck, Brian

hotrodjay · 06-23-2017, 01:37 AM

Drain pipe ended in early 35. Crankcase ventilation ended the need for a drain back pipe off the main cap. Also due to a better oil pump aswell. The question is does my main cap fit a lower seal or is it a 36 cap where it didn't exist yet? 37 was the 1st year for the lower seal. Maybe I have an early 37? Late 36? Does someone have a pic of a 37 main cap I can compare mine to?

Brian · 06-23-2017, 01:51 AM

The answer is your cap is the same style as in a 36 which does not have a separate insert as does a 'normal' 37 cap.

hotrodjay · 06-23-2017, 01:58 AM

Brian, do you have a picture?

hotrodjay · 06-23-2017, 02:01 AM

That's what I was thinking, need confirmation. Also you can see my 37 running realy good on fb. Look up hotridjay...at the end of the video i forgot to turn the ignition on...lol. I was excited...haha

hotrodjay · 06-23-2017, 02:07 AM

Thankyou Brian, helping me confirm my theory..lol. I know 36-38 was a compilation of parts. Henry didn't wast anything...lol. check out my fb. Look up hotrodjay to see this engine running. I deleted the video from my phone. You can see it on my fb. Putting it back together the way it was, thanks everyone!!!

Brian · 06-23-2017, 02:16 AM

37 rear cap

06-22-2017, 08:49 PM	#23
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions Ok so I figured out how to posts pictures finally...my error. Here they are...what do you y'all think?

06-22-2017, 08:52 PM	#24
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions I did...lol, thanks for your patience.

06-22-2017, 08:53 PM	#25
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions What do I have here?...lol

06-22-2017, 08:54 PM	#26
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions Sponsored Links (Register now to hide all advertisements) Late 36 early 37? Does my rear main cap differ from a 37? Do I have a 36 cap on my 37?

06-22-2017, 09:02 PM	#27
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions While y'all are trying to help me I figured I'd brows some other posts and see if I can help someone else to return the favor😉

06-23-2017, 12:06 AM	#28
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: 21 stud main bearing help and questions A little suprised no one mentioned you are missing a piece of pipe on the cap... The idee is to get the oilreturn below the oillevel of the engine to prevent blowby going out the rear mainseal. Looks like you have a mix of a single and double singer seals.

06-23-2017, 01:27 AM	#29
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions I know about the drain pipe, ford canceled that in early 35 due ti the crank case ventilation system. Question is does this particular main cap have a lower seal or not? If my engine is a late 36/early 37...maybe there is no seal. Is there a seal for this cap or not? Ready to install the pan but need a definite answer. Again...there was no drain pipe from 37-41. None from 41-48. Does my main cap fit a slinger seal or not? Maybe my 37 is an earlier model where a lower slinger seal didn't exist like the 36. Guess I have an early 37...36 had no seal at the main cap. I'll put it back together the way it was.

06-23-2017, 01:29 AM	#30
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,836	Re: 21 stud main bearing help and questions Your rear cap certainly resembles the type found on a 36 engine. Every 37 engine I've seen has the insert that you picture elsewhere. Thing is with these old Fords, nothing is ever totally black and white....it would appear that at least one [yours] 37 engine was produced with the earlier style rear cap. No worries, use it as is in conjunction with the inserted upper die cast piece in t5he block. It'll work....and, you don't need the oil return pipe the above poster alludes to. That item was discontinued in 1935. __________________ Unfortunately, two half wits don't make a whole wit!

06-23-2017, 01:32 AM	#31
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,836	Re: 21 stud main bearing help and questions Mate, you're a faster typist than me! My answer is the definitive answer you seek, and you are correct! Bolt it up and run it! Good luck, Brian __________________ Unfortunately, two half wits don't make a whole wit!

06-23-2017, 01:37 AM	#32
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions Drain pipe ended in early 35. Crankcase ventilation ended the need for a drain back pipe off the main cap. Also due to a better oil pump aswell. The question is does my main cap fit a lower seal or is it a 36 cap where it didn't exist yet? 37 was the 1st year for the lower seal. Maybe I have an early 37? Late 36? Does someone have a pic of a 37 main cap I can compare mine to?

06-23-2017, 01:51 AM	#33
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,836	Re: 21 stud main bearing help and questions The answer is your cap is the same style as in a 36 which does not have a separate insert as does a 'normal' 37 cap. __________________ Unfortunately, two half wits don't make a whole wit!

06-23-2017, 01:58 AM	#34
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions Brian, do you have a picture?

06-23-2017, 02:01 AM	#35
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions That's what I was thinking, need confirmation. Also you can see my 37 running realy good on fb. Look up hotridjay...at the end of the video i forgot to turn the ignition on...lol. I was excited...haha

06-23-2017, 02:07 AM	#36
hotrodjay Junior Member Join Date: Jun 2017 Posts: 29	Re: 21 stud main bearing help and questions Thankyou Brian, helping me confirm my theory..lol. I know 36-38 was a compilation of parts. Henry didn't wast anything...lol. check out my fb. Look up hotrodjay to see this engine running. I deleted the video from my phone. You can see it on my fb. Putting it back together the way it was, thanks everyone!!!