The Ford Barn

modelamodela · 11-14-2012, 11:56 AM

I have a Offy tricarb manifold on this 47 flathead, when I pour oil into the filler neck at the front of the manifold, it comes out of the top front of the oil pan, what's going on ?

Seth Swoboda · 11-14-2012, 11:58 AM

Remove the breather cap on the REAR of the engine. Pour the oil in, check oil level and replace breather cap when you are finished.

ken ct · 11-14-2012, 12:08 PM

Boy,the oil filler is at the rear of the engine NOT the front.Sounds like you have a later intake on an early engine. EXPLAIN. ken ct.

modelamodela · 11-14-2012, 12:12 PM

Maybe the intake is later, the filler is at the front of the intake, there is a plate with two bolts in the rear of the intake, behind the third Stromberg 97, close to the firewall, is that where the filler should have been?

Bruce Lancaster · 11-14-2012, 12:16 PM

Inside the engine valley there is a vertical pipe (at right front) that is a major vent; this vent exits at the bottom via a little structure on the pan on a pre-1949 engine and on a late engine vent and inlet for ventilation system are at the top of the pipe...so you are dumping oil straight down into the vent system exit!

ken ct · 11-14-2012, 12:35 PM

Sponsored Links (Register now to hide all advertisements)

Put a pre49 oil fill at the back,close off opening with a plate and pour oil there. Stick a breather on it and your set to go. ken ct. Is there an opening at the rear of manifold thats blocked off ??

flatjack9 · 11-14-2012, 01:07 PM

Check the manifold gasket to see that there is a hole that corresponds with that filler location.

ken ct · 11-14-2012, 01:54 PM

Hes trying to use a 49-53 intake on a 47 motor???????????????? ken ct. There totaly different /

Ol' Ron · 11-14-2012, 07:54 PM

This should work just fine if he uses the late intake gasket. No need to use the rear filler.

Walt Dupont--Me. · 11-14-2012, 09:47 PM

Ok, lets start over. everdently you have a an 8BA, 49=53 intake on 59Ab 48 and older engine. On the front of the 8BA intake there is 2 holes about 1-1/4 in dia. The rear one is where the oil filler pipe belongs. The front hole suppose to have a breather pipe that curves down around the front cover and along the left side of the oil pan. NOW under the front of the intake there is a breather pipe. On the 8BA engine the pipe stick up about 1/8in. above the block gasket surface and sticks into the intake manifold where the front breathe pipe goes. On the 48 and older engine like yours the pipe is shorter and does not stick into the maifold and breathes out of that vent in the oil, pan. SO, you may be pouring oil in the front hole and it's going right down the pipe. At this stage of the game you probably better off plugging the 2 front holes and pour oil in the rear of the intake. Everdentaly your running an electric fuel pump. Walt

Ol' Ron · 11-14-2012, 11:25 PM

Atta boy Walt.

modelamodela · 11-15-2012, 12:23 PM

Thanks to Walt and everyone who helped me get this straightened out. Oil goes in the back of the manifold, no room for a filler pipe, too close to the firewall in this old rod, but just removed the plate there and filled the crankcase without problem. The "oil filler tube" of front is just for breathing. Life is good.

18tillidie · 06-26-2021, 08:59 PM

New to the forum… I know I’m resurrecting a very old post, but I came across it when researching exactly the same issue with an Offenhauser 3x2 intake on a 50 Flathead, so thought I’d update with some more info, since it was the only post I could find anywhere.
After a lot of similar discussion on the HAMB forum, I decided to remove the intake to figure out exactly what was happening…
There are three versions of the Offenhauser 3x2 covering the various Flathead series, and two different gaskets. The photos below show the intake I have, with the oil filler in the center front and the breather vent on the front right. (Looking from the front)
The gasket is the one listed for a 49-53 Flathead, but this gasket blocks the front filler/vent!
You can see the indentation of the filler vent on the gasket on the block with the intake removed, and a better idea from the photo of the gasket sitting on intake, offset showing the two vents.
The internal vent tube to the crankcase had been removed, since the outlet breather in the intake casting runs from the right, around the back of the inlet breather to the left (where the internal tube would have been).
The net result was that there was no air coming in to the engine whatsoever, only the outlet breather that runs down the front of the engine and discharges beside the oil pan on the left. Since it has an electric fuel pump, the fuel pump flange at the rear had a blanking cover on it.
I ordered the other gasket, which should fix the issue, as well as a breather tube for the fuel pump flange.
The whole thing was driving me crazy, so happy now I figured out what was going on!

Desoto291Hemi · 06-26-2021, 10:34 PM

Hi 18 ,
You have a very clean looking engine inside .
I’m sure it is in excellent condition,,,,the intake ports look great as well .
The valves should be sealing perfectly .
That large hole in the front of the block in the tappet chamber,,,,,you said the pipe is missing.
Im Sure some guys here can help you with that ,,,,,they have extra parts that they will turn loose for a reasonable offer .
Just ask,,,,they can help you .

Tommy

18tillidie · 06-27-2021, 12:18 AM

Thanks. From my research (but I’m new to flatheads, so I could be way off…) the inlet breather on the original inlet was directly over the internal tube on the left, and the outlet was on the right.
On this version of the Offenhauser, for some wired reason, the outlet crosses over and is above the internal tube receiver, and the inlet is in the center and a smaller diameter. It almost seems like they intended to reverse the air circulation so it comes in through the top end, then down though the crankcase and then up through the breather tube and out the outlet? If that makes sense to anyone, maybe putting the tube back in would work, otherwise, I would need to make one up with two 45 bends and then reduce to the smaller diameter.
Prior to this, there was no air coming in at all, once I replace the gasket, there will be air coming in and out the top end, but nothing getting to the crankcase. But at least it will breath!
Keen for anyone with better knowledge than me to chime in.
Apart from motorcycles, I haven’t wrenched on anything like this for 30 years… forgot how much I enjoyed it!

18tillidie · 06-27-2021, 12:25 AM

Quote:

Originally Posted by Desoto291Hemi

Hi 18 ,
You have a very clean looking engine inside .
I’m sure it is in excellent condition,,,,the intake ports look great as well .
The valves should be sealing perfectly .
That large hole in the front of the block in the tappet chamber,,,,,you said the pipe is missing.
Im Sure some guys here can help you with that ,,,,,they have extra parts that they will turn loose for a reasonable offer .
Just ask,,,,they can help you .

Tommy

If anyone here does have a spare, please let me know.
I have a related discussion going on HAMB as well, so hopefully one will turn up!
Thanks!

Tinker · 06-27-2021, 12:26 AM

If you are talking about the cross over heat riser for the carb. Some guys block those with a pennies to limit heat to the carbs. But you have 3x2 setup and are asking about oil input. Why not make up a cap on where the fuel pump was and just pour it in there. Or get the right gasket? I would guess offy can help.

18tillidie · 06-27-2021, 12:58 AM

Quote:

Originally Posted by Tinker

If you are talking about the cross over heat riser for the carb. Some guys block those with a pennies to limit heat to the carbs. But you have 3x2 setup and are asking about oil input. Why not make up a cap on where the fuel pump was and just pour it in there. Or get the right gasket? I would guess offy can help.

Thanks. Yes this all started with an oil change… I had just finish rebuilding the carbs getting it running. I got the oil in through the fuel pump flange, but realized the engine was not getting any ventilation. I have ordered the correct gasket, and need to reinstall the internal breather tube to the crankcase once I track one down. I also ordered a breather for the fuel pump flange as well.

Tinker · 06-27-2021, 01:02 AM

Sounds like you are narrowing it down. If you are taking crank case venting you can add a baffle on the oil pan. Please share what you find. Cheers.

18tillidie · 06-27-2021, 01:22 AM

I found an air circulation diagram, and it appears the air does come in through the top end, down through the crankcase, then up through the internal vent tube to the discharge vent, so that makes sense with the alignment of the vents on the intake. It cleared up one point that was baffling me!

11-14-2012, 11:56 AM	#1
modelamodela Member Join Date: May 2010 Posts: 76	How to fill crankcse with oil in 47 flathead I have a Offy tricarb manifold on this 47 flathead, when I pour oil into the filler neck at the front of the manifold, it comes out of the top front of the oil pan, what's going on ?

11-14-2012, 11:58 AM	#2
Seth Swoboda Senior Member Join Date: May 2010 Location: Southern Illinois Posts: 4,079	Re: How to fill crankcse with oil in 47 flathead Remove the breather cap on the REAR of the engine. Pour the oil in, check oil level and replace breather cap when you are finished.

11-14-2012, 12:08 PM	#3
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: How to fill crankcse with oil in 47 flathead Boy,the oil filler is at the rear of the engine NOT the front.Sounds like you have a later intake on an early engine. EXPLAIN. ken ct.

11-14-2012, 12:12 PM	#4
modelamodela Member Join Date: May 2010 Posts: 76	Re: How to fill crankcse with oil in 47 flathead Maybe the intake is later, the filler is at the front of the intake, there is a plate with two bolts in the rear of the intake, behind the third Stromberg 97, close to the firewall, is that where the filler should have been?

11-14-2012, 12:16 PM	#5
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: How to fill crankcse with oil in 47 flathead Inside the engine valley there is a vertical pipe (at right front) that is a major vent; this vent exits at the bottom via a little structure on the pan on a pre-1949 engine and on a late engine vent and inlet for ventilation system are at the top of the pipe...so you are dumping oil straight down into the vent system exit!

11-14-2012, 12:35 PM	#6
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: How to fill crankcse with oil in 47 flathead Sponsored Links (Register now to hide all advertisements) Put a pre49 oil fill at the back,close off opening with a plate and pour oil there. Stick a breather on it and your set to go. ken ct. Is there an opening at the rear of manifold thats blocked off ??

11-14-2012, 01:07 PM	#7
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,600	Re: How to fill crankcse with oil in 47 flathead Check the manifold gasket to see that there is a hole that corresponds with that filler location.

11-14-2012, 01:54 PM	#8
ken ct BANNED Join Date: May 2010 Location: stratford,ct Posts: 5,971	Re: How to fill crankcse with oil in 47 flathead Hes trying to use a 49-53 intake on a 47 motor???????????????? ken ct. There totaly different /

11-14-2012, 07:54 PM	#9
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: How to fill crankcse with oil in 47 flathead This should work just fine if he uses the late intake gasket. No need to use the rear filler.

11-14-2012, 09:47 PM	#10
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: How to fill crankcse with oil in 47 flathead Ok, lets start over. everdently you have a an 8BA, 49=53 intake on 59Ab 48 and older engine. On the front of the 8BA intake there is 2 holes about 1-1/4 in dia. The rear one is where the oil filler pipe belongs. The front hole suppose to have a breather pipe that curves down around the front cover and along the left side of the oil pan. NOW under the front of the intake there is a breather pipe. On the 8BA engine the pipe stick up about 1/8in. above the block gasket surface and sticks into the intake manifold where the front breathe pipe goes. On the 48 and older engine like yours the pipe is shorter and does not stick into the maifold and breathes out of that vent in the oil, pan. SO, you may be pouring oil in the front hole and it's going right down the pipe. At this stage of the game you probably better off plugging the 2 front holes and pour oil in the rear of the intake. Everdentaly your running an electric fuel pump. Walt

11-14-2012, 11:25 PM	#11
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: How to fill crankcse with oil in 47 flathead Atta boy Walt.

11-15-2012, 12:23 PM	#12
modelamodela Member Join Date: May 2010 Posts: 76	Re: How to fill crankcse with oil in 47 flathead Thanks to Walt and everyone who helped me get this straightened out. Oil goes in the back of the manifold, no room for a filler pipe, too close to the firewall in this old rod, but just removed the plate there and filled the crankcase without problem. The "oil filler tube" of front is just for breathing. Life is good.

06-26-2021, 10:34 PM	#14
Desoto291Hemi Senior Member Join Date: Oct 2019 Location: Carthage , Tennessee Posts: 199	Re: How to fill crankcse with oil in 47 flathead Hi 18 , You have a very clean looking engine inside . I’m sure it is in excellent condition,,,,the intake ports look great as well . The valves should be sealing perfectly . That large hole in the front of the block in the tappet chamber,,,,,you said the pipe is missing. Im Sure some guys here can help you with that ,,,,,they have extra parts that they will turn loose for a reasonable offer . Just ask,,,,they can help you . Tommy

06-27-2021, 12:18 AM	#15
18tillidie Junior Member Join Date: Jun 2021 Posts: 24	Re: How to fill crankcse with oil in 47 flathead Thanks. From my research (but I’m new to flatheads, so I could be way off…) the inlet breather on the original inlet was directly over the internal tube on the left, and the outlet was on the right. On this version of the Offenhauser, for some wired reason, the outlet crosses over and is above the internal tube receiver, and the inlet is in the center and a smaller diameter. It almost seems like they intended to reverse the air circulation so it comes in through the top end, then down though the crankcase and then up through the breather tube and out the outlet? If that makes sense to anyone, maybe putting the tube back in would work, otherwise, I would need to make one up with two 45 bends and then reduce to the smaller diameter. Prior to this, there was no air coming in at all, once I replace the gasket, there will be air coming in and out the top end, but nothing getting to the crankcase. But at least it will breath! Keen for anyone with better knowledge than me to chime in. Apart from motorcycles, I haven’t wrenched on anything like this for 30 years… forgot how much I enjoyed it! Last edited by 18tillidie; 06-27-2021 at 12:19 AM. Reason: Correction

06-27-2021, 12:26 AM	#17
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,063	Re: How to fill crankcse with oil in 47 flathead If you are talking about the cross over heat riser for the carb. Some guys block those with a pennies to limit heat to the carbs. But you have 3x2 setup and are asking about oil input. Why not make up a cap on where the fuel pump was and just pour it in there. Or get the right gasket? I would guess offy can help.

06-27-2021, 01:02 AM	#19
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,063	Re: How to fill crankcse with oil in 47 flathead Sounds like you are narrowing it down. If you are taking crank case venting you can add a baffle on the oil pan. Please share what you find. Cheers.

06-27-2021, 01:22 AM	#20
18tillidie Junior Member Join Date: Jun 2021 Posts: 24	Re: How to fill crankcse with oil in 47 flathead I found an air circulation diagram, and it appears the air does come in through the top end, down through the crankcase, then up through the internal vent tube to the discharge vent, so that makes sense with the alignment of the vents on the intake. It cleared up one point that was baffling me!