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34 standard 8 oil leak at rear main area
#1
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Barry Lowe
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I have just finished rebuilding this motor and every time we drive the car we have oil running out of the drain hole in the bell housing, we have taken the pan off 5 times and looked at everything we can think of, every thing seems to be correct....
Does anyone have any feed back regarding what could be wrong?
Thanks
Barry Lowe
336-516-7009

Posted on: 5/6 19:24
1925 333 Phaeton
1926 Phantom 1 Rolls Royce
1926 Hudon super six Coupe
1927 Peerless Roadster
1927 433 7 passenger limo
1928 Peerless coupe
1929 Peerless Boatail coupe
1929 Phantom I Rolls Royce
1930 Springfield Phantom 1 regent
1931 L-29 Cord
1931 833 Convertible
1931 833 Opera coupe
1934 1101 Roadster
1934 1101 Coupe
1934 V12 Opera coupe
1936 120
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Re: 34 standard 8 oil leak at rear main area
#2
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Owen_Dyneto
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As you no doubt know that engine does not use a conventional rear seal but rather uses a slinger, intergral with the crankshaft. So the very first thing I'd check is that the slinger itself is intact, and to insure that the drain passage is open that allows the oil captured by the slinger to return to the crankcase.

The second thing to check is the closure at the rear camshaft bearing, its a triangular plate up inside the bellhousing area so the leakage would be discharging into the clutch area. I've seen or heard of this failure several times.

Third thing, a very remote possibility, is that the Bijur chassis oiler hose to the throwout bearing has come loose from the drip plug and Bijur oil is discharging into the clutch area. Note that this would be a very small volume oil loss. If you have replaced the throwout bearing with a modern sealed type, don't forget to disable the oil line to it.

Posted on: 5/6 19:41
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Re: 34 standard 8 oil leak at rear main area
#3
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Barry Lowe
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Thank you! we are going to pull the motor back out to check the cam shaft as you mention, this is the 5 or 6th motor ive rebuilt and never had an issue before.
I appreciate your input and if I find anything ill surely share it here as well.
Have a great weekend
Barry

Posted on: 5/7 19:26
1925 333 Phaeton
1926 Phantom 1 Rolls Royce
1926 Hudon super six Coupe
1927 Peerless Roadster
1927 433 7 passenger limo
1928 Peerless coupe
1929 Peerless Boatail coupe
1929 Phantom I Rolls Royce
1930 Springfield Phantom 1 regent
1931 L-29 Cord
1931 833 Convertible
1931 833 Opera coupe
1934 1101 Roadster
1934 1101 Coupe
1934 V12 Opera coupe
1936 120
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Re: 34 standard 8 oil leak at rear main area
#4
Not too shy to talk
Not too shy to talk

GaryinSC
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I had the same issue with my 32 Std 8, in my case I found the rear cam shaft bearing was compromised by some previous hacker and I had to fit a new bearing and gasket. This is a tough job as removing the transmission and flywheel is required to access it. That bearing needs a gasket under it, which I made up. I also used aviation form a gasket on all surfaces just because accessing it is a hassle so wanted to make sure it never leaked again. The other possible issue is the slinger drain hole in the oil pan flange. Keep in mind that the pan has a bulkhead that separates the engine portion from the section which makes up the lower section of what could be called the bell housing. That bulkhead has a hole in the center that carries the oil from the slinger back to the bottom of the oil pan. If the pan gasket is not sealed properly or the hole is somehow covered up ( possibly the wrong gasket) , it can leak into the bell housing and show up with a leak on the floor. The problem is that that bulkhead flange is blind with no fasteners to pull the pan up tight. The oil from the slinger is not under much pressure because it is the excess oil coming out of the bearing, but if your rear main bearing is not tight, it could be forcing more oil down the slinger than the hole can handle. If the rear bearing is tight, I would be inclined to think it is the pan gasket not sealing around the slinger drain hole on the bulkhead flange.
The pan gasket needs to be sealed around that hole, but not block it. I concur on the Bijur not being the issue, as both the throw out bearing and the clutch fork oiler from the Bijur would not have very much oil going into the bell housing, which is the reason for that hole to begin with.

Posted on: 5/8 7:31
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Re: 34 standard 8 oil leak at rear main area
#5
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Ernie Vitucci
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Good Morning...I do wonder if the rear main bearing might have a bit too much clearance...this condition can cause the sort of leak that you are experiencing...Ernie in Arizona

Posted on: 5/8 9:48
Caretaker of the 1949-288 Deluxe Touring Sedan
'Miss Prudence' and the 1931 Model A Ford Tudor 'Miss Princess'
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Re: 34 standard 8 oil leak at rear main area
#6
Home away from home
Home away from home

Barry Lowe
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thanks for your reply and the phone calls I also received regarding this leaking issue.
I was called by a member here and they told me to remove the rear main bearing and put a coating of locktite 518 between the bearing housing and the bearing shell and let it sit over night and then reassemble the motor.
This did just as it was suggested it would do, it sealed the oil from leaking between the housing and the shell.
If any of you have such a leak i would recommend it, it really did do the trick for me....
thanks again for all who have responded.
Barry Lowe
336-516-7009

Posted on: 5/17 18:56
1925 333 Phaeton
1926 Phantom 1 Rolls Royce
1926 Hudon super six Coupe
1927 Peerless Roadster
1927 433 7 passenger limo
1928 Peerless coupe
1929 Peerless Boatail coupe
1929 Phantom I Rolls Royce
1930 Springfield Phantom 1 regent
1931 L-29 Cord
1931 833 Convertible
1931 833 Opera coupe
1934 1101 Roadster
1934 1101 Coupe
1934 V12 Opera coupe
1936 120
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