The Ford Barn

Maclab58 · 07-11-2010, 08:18 PM

HELP! I just got my 28 AR sports coupe running. It really runs pretty good but when i turn it off it pours oil out of the back of the block. assume that this is caused by a faulty rear seal. the car had set up for 12 years when i bought it but had been restored 30 years ago. When I replaced the valve cover gasket I found 6-8 pipe cleaners stuffed down the rear oil drain hole which i think drains into the rear crank journal. Can the rear seal be replaced with the engine in the car? This is my first Model A and I dont have a clue as to what is the easiest fix and I dont want to screw it up.

Russ/40 · 07-11-2010, 08:24 PM

There is no rear main seal. There is a cork gasket that sits on top of the rear main cap to seal the rear edge of the pan. That could be your problem. Yes you can change that in the car.

MAG · 07-11-2010, 09:27 PM

You are correct that the pipe cleaners were blocking the oil supply to the rear main. And evidently they were installed in an attempt to stop the oil leak. My suggestion would be to remove the pan and check to see that the rear main oil drain pipe is intact anf not plugged. There could be other sources for the leak such as the gasket between the engine block and the flywheel housing. But, start with the more simple things first.

Glenn C. · 07-11-2010, 10:08 PM

The rear main labrinth seal can not be replaced with the engine in the car, or at least without a lot of difficulty. Babbit thrust face may be broke away also. With the vehicle secured and elevated on proper stands, you might slide under from the front, with the engine running and take a look. Maybe if needed, removce the flywheel housing cover and check to see if the oil problem is from the inside. If the oil seems to be coming from between the flywheel housing and the engine block, then it is for sure the gasket is leaking, or the cork gasket between the pan and rear main.

pat in Santa Cruz · 07-11-2010, 10:57 PM

here's a good treatise on the rear main leak

http://antiqueenginerebuilding.com/REARMAINLEAK.html

captaincorley · 07-11-2010, 11:19 PM

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Great help here! Thanks

50B · 07-12-2010, 12:28 AM

Quote:

Originally Posted by Maclab58

HELP! I just got my 28 AR sports coupe running. It really runs pretty good but when i turn it off it pours oil out of the back of the block. assume that this is caused by a faulty rear seal. the car had set up for 12 years when i bought it but had been restored 30 years ago. When I replaced the valve cover gasket I found 6-8 pipe cleaners stuffed down the rear oil drain hole which i think drains into the rear crank journal. Can the rear seal be replaced with the engine in the car? This is my first Model A and I dont have a clue as to what is the easiest fix and I dont want to screw it up.

The correct name for your car is SPORT COUPE not SPORTS drop the S. please look it up.
50B

Mike V. Florida · 07-12-2010, 01:40 AM

Quote:

Originally Posted by 50B

The correct name for your car is SPORT COUPE not SPORTS drop the S. please look it up.
50B

Your very first post on this site and it has to be about the letter s at the end of a word? Then you have to add the jab "look it up"?

07-11-2010, 08:18 PM	#1
Maclab58 Senior Member Join Date: Jul 2010 Location: Wichita Falls, Texas Posts: 983	oil leak HELP! I just got my 28 AR sports coupe running. It really runs pretty good but when i turn it off it pours oil out of the back of the block. assume that this is caused by a faulty rear seal. the car had set up for 12 years when i bought it but had been restored 30 years ago. When I replaced the valve cover gasket I found 6-8 pipe cleaners stuffed down the rear oil drain hole which i think drains into the rear crank journal. Can the rear seal be replaced with the engine in the car? This is my first Model A and I dont have a clue as to what is the easiest fix and I dont want to screw it up.

07-11-2010, 08:24 PM	#2
Russ/40 Senior Member Join Date: May 2010 Location: Santee, California Posts: 3,505	Re: oil leak There is no rear main seal. There is a cork gasket that sits on top of the rear main cap to seal the rear edge of the pan. That could be your problem. Yes you can change that in the car.

07-11-2010, 09:27 PM	#3
MAG Senior Member Join Date: May 2010 Location: Austin, Texas Posts: 925	Re: oil leak You are correct that the pipe cleaners were blocking the oil supply to the rear main. And evidently they were installed in an attempt to stop the oil leak. My suggestion would be to remove the pan and check to see that the rear main oil drain pipe is intact anf not plugged. There could be other sources for the leak such as the gasket between the engine block and the flywheel housing. But, start with the more simple things first. __________________ I noticed the harder I work the luckier I get!

07-11-2010, 10:08 PM	#4
Glenn C. Senior Member Join Date: May 2010 Location: Didsbury Alberta Posts: 838	Re: oil leak The rear main labrinth seal can not be replaced with the engine in the car, or at least without a lot of difficulty. Babbit thrust face may be broke away also. With the vehicle secured and elevated on proper stands, you might slide under from the front, with the engine running and take a look. Maybe if needed, removce the flywheel housing cover and check to see if the oil problem is from the inside. If the oil seems to be coming from between the flywheel housing and the engine block, then it is for sure the gasket is leaking, or the cork gasket between the pan and rear main.

07-11-2010, 10:57 PM	#5
pat in Santa Cruz Senior Member Join Date: May 2010 Location: santa cruz, calif Posts: 2,011	Re: oil leak here's a good treatise on the rear main leak http://antiqueenginerebuilding.com/REARMAINLEAK.html

07-11-2010, 11:19 PM	#6
captaincorley Junior Member Join Date: Jul 2010 Location: North Texas Posts: 5	Re: oil leak Sponsored Links (Register now to hide all advertisements) Great help here! Thanks