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The rear main bearing has a threaded 1/2 in diameter hole where an oil return flow tube is screwed in. This tube channels oil back to the pan rather than allowing it to flow back into the flywheel, creating an oil leak. What is the thread type for this..seems very fin threaded, possibly size 32 threads?
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Vince’s site and the suppliers list the pipe as 3/8th....ck this link for more info
http://www.fordgarage.com/pages/rearmainbearingcaps.htm -
Isn't that for Model A and Model B. I have a 1933 early v8, and the thread into the main cap is 1/2, and the tube is 1/2 diameter S shaped with an end ball?Comment
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It's 1/2" - 32 tpi.. for the V-8
You assumption on the first post is correct.png "smile")
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I am in the process of cleaning any sludge and old oil from my A’s little motor. Dropped the oil pan and I guess I am missing the rear main cap drain tube. Yikes...02-07-2019, 10:23 AM -
AFTER PUTTING ABOUT 50 MILES ON MY 29 MODEL A . THE NEXT MORNING I NOTICED A A FAIRLEY LARGE OIL SPOT UNDER THE REAR MAIN . I AM PLANNING ON DROPING THE PAN SOON , ANY THOUGHTS TO WHAT I MIGHT FIND ARE APPRECIATED08-05-2018, 03:56 PM -
I have heard the story that over-filling the pan on an A engine will cause the rear main to leak. I have no reason to NOT believe this, but I would sure like to understand WHY it is so.
Anybody with the answer?
Thanks.
Bill02-19-2019, 09:54 PM -
I have an oil fill tube that does not have a removable cap. It does have a flexible vent pipe going down the side. What is this thing?05-31-2017, 07:50 AM -
I have been seeing folk getting all over MMO and questioning the reason for using it. Well, I think it is time to clear a bit of air within these airheads and explain why MMO or Seafoam, or these top end lubricants are almost a must.
If you will take a look at this picture of the valve chamber, you will see to the right a copper tube protruding from the bottom of the valve valley. Well,...09-05-2017, 10:30 PM -
Several threads have popped up here about various oil leaks.
Well, on vintage stuff, ya gonna have'em.
But we try to keep them small.
If you think you have a rear main leak, Rich Fallucca has a good read on this:
http://antiqueenginerebuilding.com/REARMAINLEAK.html
BUT there is one more thing to check, and it might be worth it to check this first:
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Just dropped the sump (looking for the source of an oil leak around the rear main bearing) and found some metal under the baffle at the front that I can’t identify. A couple of the pieces are fairly substantial - the biggest one is around 20mm Long and 5mm thick. Any clues on where to go looking? The engine has been running OK with no odd noises. It has an engine reconditioner label on the side,...You do not have permission to view this gallery.
This gallery has 2 photos.05-26-2018, 12:12 AM -
The Model T does not have an oil pump. The engine and transmission share an oil pan, they are both bathed in the same oil. That oil is picked up by dippers under the connecting rods and slung around the engine. The magneto is attached to the flywheel and the bottom of it spins through the sump throwing oil everywhere. Ford had a funnel and tube system to catch some of that oil slung by the magneto...You do not have permission to view this gallery.
This gallery has 2 photos.09-24-2018, 09:38 AM -
Well, after some, in depth, diagnosis, it seems my "oil leak" is, mostly coolant. I can't tell precisely where its coming from. The car has a pressurized system and an overflow added so I'll have to get it up to temp and have a look see. It is leaking oil from the rear main, as well. I think I'll drop the pan and Plastigauge it. I have a rather steep, long driveway here at The Fongderosa...01-15-2018, 03:06 PM -
Sludge in the bottom of the pan is common due to non-detergent oil. If 10 years of non-detergent and 10+ modern detergent oil and engine build; then it seems like the sludge would be cleaned out. I still had a good layer of about 3/8 inch.
I did not check when the pan was off, but suspect a good amount of oil is in the pan below the drain hole. With the engine tilt it seems like there...03-23-2019, 01:58 AM
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