The Ford Barn

JayJay · 01-30-2024, 12:47 PM

The two sealing surfaces on the oil return pipe have an offset because the sealing surface on the valve cover is farther away from the cylinder centerline than the sealing surface on the block. Does anyone know, or have a print that shows, what that offset is? I need to rebraze a leaking tube and would like to build a jig to hold it while I do so.

I'm concerned about the later (longer) oil return pipe. I've seen three numbers for this - A6645, A6647 and A6648.

Thanks a million.

JayJay

J Franklin · 01-30-2024, 12:57 PM

It can be cleaned, prepped and the joint soldered in place using the engine as the jig.

Randall · 01-30-2024, 01:07 PM

Jay here's one I made to check for leaks and a jig to solder ,I show it in video, will measure the off set later this afternoon
https://youtu.be/W9TvsqfyFl8?si=D7_lMIYo7sktTLws

JayJay · 01-30-2024, 01:11 PM

Quote:

Originally Posted by Randall

Jay here's one I made to check for leaks and a jig to solder ,I show it in video, will measure the off set later this afternoon
https://youtu.be/W9TvsqfyFl8?si=D7_lMIYo7sktTLws

Sweet! Thanks a million.

Brentwood Bob · 01-30-2024, 01:24 PM

Good one Randall. What was the distance off set you used?

Randall · 01-30-2024, 02:06 PM

Sponsored Links (Register now to hide all advertisements)

5/8”. Thanks

Big hammer · 01-30-2024, 03:19 PM

Don’t forget about the distance, bolt hole to bolt hole !

Flathead · 01-30-2024, 04:45 PM

How about using a junk block and side cover for a jig?

Brentwood Bob · 01-30-2024, 05:25 PM

5/8". Thanks.

JayJay · 01-30-2024, 06:12 PM

Quote:

Originally Posted by Flathead

How about using a junk block and side cover for a jig?

Yeah, could do that if I had a junk block, other than the one that's in the car

. But I'll check 5/8" and if it seems close that's what I'll go with.

Flathead · 01-31-2024, 11:21 AM

We have plenty of junk blocks here in Maine.

katy · 02-01-2024, 02:10 PM

Put a straight edge on the side cover opening down to the block opening and measure it. Simples.

JayJay · 02-03-2024, 11:47 AM

Quote:

Originally Posted by katy

Put a straight edge on the side cover opening down to the block opening and measure it. Simples.

Katy - that certainly is one way to do it, but I was hoping to get the intended offset so my measurement wasn’t affected by whatever cover gasket is in place. I got sidetracked and have not done this yet, but thanks to all for responding.

01-30-2024, 12:47 PM	#1
JayJay Senior Member Join Date: Jan 2020 Location: SF Bay Area Posts: 1,077	Oil return pipe offset? The two sealing surfaces on the oil return pipe have an offset because the sealing surface on the valve cover is farther away from the cylinder centerline than the sealing surface on the block. Does anyone know, or have a print that shows, what that offset is? I need to rebraze a leaking tube and would like to build a jig to hold it while I do so. I'm concerned about the later (longer) oil return pipe. I've seen three numbers for this - A6645, A6647 and A6648. Thanks a million. JayJay __________________ JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan

01-30-2024, 12:57 PM	#2
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 5,963	Re: Oil return pipe offset? It can be cleaned, prepped and the joint soldered in place using the engine as the jig.

01-30-2024, 01:07 PM	#3
Randall Senior Member Join Date: Nov 2010 Location: Lambsburg Va Posts: 296	Re: Oil return pipe offset? Jay here's one I made to check for leaks and a jig to solder ,I show it in video, will measure the off set later this afternoon https://youtu.be/W9TvsqfyFl8?si=D7_lMIYo7sktTLws

01-30-2024, 01:24 PM	#5
Brentwood Bob Senior Member Join Date: May 2010 Location: brentwood, ca Posts: 4,246	Re: Oil return pipe offset? Good one Randall. What was the distance off set you used? Last edited by Brentwood Bob; 01-30-2024 at 01:46 PM.

01-30-2024, 02:06 PM	#6
Randall Senior Member Join Date: Nov 2010 Location: Lambsburg Va Posts: 296	Re: Oil return pipe offset? Sponsored Links (Register now to hide all advertisements) 5/8”. Thanks

01-30-2024, 03:19 PM	#7
Big hammer Senior Member Join Date: Jun 2014 Location: Land of Lincoln Posts: 3,131	Re: Oil return pipe offset? Don’t forget about the distance, bolt hole to bolt hole ! __________________ Don't force it with a little hammer tap, tap, tap get a bigger hammer tap done

01-30-2024, 04:45 PM	#8
Flathead Senior Member Join Date: May 2010 Location: Southern Maine Posts: 1,499	Re: Oil return pipe offset? How about using a junk block and side cover for a jig?

01-30-2024, 05:25 PM	#9
Brentwood Bob Senior Member Join Date: May 2010 Location: brentwood, ca Posts: 4,246	Re: Oil return pipe offset? 5/8". Thanks.

01-31-2024, 11:21 AM	#11
Flathead Senior Member Join Date: May 2010 Location: Southern Maine Posts: 1,499	Re: Oil return pipe offset? We have plenty of junk blocks here in Maine.

02-01-2024, 02:10 PM	#12
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,046	Re: Oil return pipe offset? Put a straight edge on the side cover opening down to the block opening and measure it. Simples. __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!