The Ford Barn

Dave27 · 11-07-2013, 11:13 AM

On my dads 51 ford 8BA flathead engine there are 2 holes in the back of the block one has a line running to the oil filter which is fine the other has a fitting with a reducer then the oil pressure gauge line comes out of it and goes to the gauge. Well I want to try and find a threaded fitting that screws into the block and is the correct size for the oil pressure line on the other end.(adaptor threded on both ends but large on one side and small on the other) Right now we have 2 brass ftgs and they leak. I thought the potential for a leak would be reduced if it was 1 ftg anyone know where to buy one. Or do they make a ftg that anyone knows of just for this......Thankyou.....Dave

34PKUP · 11-07-2013, 07:31 PM

Normally the holes in the block a 1/4" pipe. There are at least 3 different possibilities for adapter fittings, flare, inverted flare or compression. (who knows what may have been installed over the years).
Only you can make the determination as to what size and type you have.

51 MERC-CT · 11-07-2013, 07:50 PM

As stated, at least 3 different possibilities.
Remove what you have to compare.
Brass fittings available at most hardware or hydraulic supply stores.

19Fordy · 11-08-2013, 10:17 AM

I found using teflon tape is a good idea.

34PKUP · 11-08-2013, 10:30 AM

Quote:

Originally Posted by 19Fordy

I found using teflon tape is a good idea.

I would not use Teflon tape.
Use non-hardening Permatex, it can be used on all seal surfaces (including the flare)

Jack E/NJ · 11-08-2013, 10:55 AM

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34pkup>>>I would not use Teflon tape>>>

Agreed. Not on fuel lines and not even on oil furnace supply lines due to possibility of pieces clogging filters, jets & nozzles.

Jack E/NJ

1 Raggedy Ride · 11-10-2013, 06:29 AM

I agree with the non users of Teflon tape, DON'T.......if you need to tighten up the threads, candle wicking into the threads with Permatex over that, is another choice........

ken ct · 11-10-2013, 06:55 AM

Teflon tape is not for petroleum products,oil,gasoline etc. etc. Its plumbers tape === WATER. ken ct.

Motorhead6 · 11-10-2013, 06:57 AM

1/8" npt

11-07-2013, 11:13 AM	#1
Dave27 Senior Member Join Date: May 2011 Location: Snohomish,Wa. Posts: 139	Thread size of the oil pressure hole in the back of the 51 8BA flathead ford block On my dads 51 ford 8BA flathead engine there are 2 holes in the back of the block one has a line running to the oil filter which is fine the other has a fitting with a reducer then the oil pressure gauge line comes out of it and goes to the gauge. Well I want to try and find a threaded fitting that screws into the block and is the correct size for the oil pressure line on the other end.(adaptor threded on both ends but large on one side and small on the other) Right now we have 2 brass ftgs and they leak. I thought the potential for a leak would be reduced if it was 1 ftg anyone know where to buy one. Or do they make a ftg that anyone knows of just for this......Thankyou.....Dave

11-07-2013, 07:31 PM	#2
34PKUP Senior Member Join Date: Feb 2011 Posts: 794	Re: Thread size of the oil pressure hole in the back of the 51 8BA flathead ford blo Normally the holes in the block a 1/4" pipe. There are at least 3 different possibilities for adapter fittings, flare, inverted flare or compression. (who knows what may have been installed over the years). Only you can make the determination as to what size and type you have.

11-07-2013, 07:50 PM	#3
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: Thread size of the oil pressure hole in the back of the 51 8BA flathead ford blo As stated, at least 3 different possibilities. Remove what you have to compare. Brass fittings available at most hardware or hydraulic supply stores. __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

11-08-2013, 10:17 AM	#4
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,933	Re: Thread size of the oil pressure hole in the back of the 51 8BA flathead ford blo I found using teflon tape is a good idea.

11-08-2013, 10:55 AM	#6
Jack E/NJ Senior Member Join Date: May 2010 Posts: 2,173	Re: Thread size of the oil pressure hole in the back of the 51 8BA flathead ford blo Sponsored Links (Register now to hide all advertisements) 34pkup>>>I would not use Teflon tape>>> Agreed. Not on fuel lines and not even on oil furnace supply lines due to possibility of pieces clogging filters, jets & nozzles. Jack E/NJ

11-10-2013, 06:29 AM	#7
1 Raggedy Ride Senior Member Join Date: Aug 2012 Location: Henrietta, New York Posts: 118	Re: Thread size of the oil pressure hole in the back of the 51 8BA flathead ford blo I agree with the non users of Teflon tape, DON'T.......if you need to tighten up the threads, candle wicking into the threads with Permatex over that, is another choice........ __________________ 1 RAGGEDY RIDE

11-10-2013, 06:55 AM	#8
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: Thread size of the oil pressure hole in the back of the 51 8BA flathead ford blo Teflon tape is not for petroleum products,oil,gasoline etc. etc. Its plumbers tape === WATER. ken ct.

11-10-2013, 06:57 AM	#9
Motorhead6 Senior Member Join Date: Jul 2012 Location: Orange Park, Fl Posts: 406	Re: Thread size of the oil pressure hole in the back of the 51 8BA flathead ford blo 1/8" npt