The Ford Barn

mll1446 · 02-10-2013, 02:07 PM

Can a Rear main oil seal be changed while engine in car?

txturbo · 02-10-2013, 02:08 PM

depends on the car

Keith True · 02-10-2013, 02:46 PM

If it's an A,not really,as the A doesn't have a rear seal.It has a slinger,or baffle as some call it.If you have a leak it is worn babbit,gasket around the cam hole,missing drain tube,and a half dozen other things.My money would be on bad babbit.

Kurt in NJ · 02-10-2013, 04:17 PM

It all depends ---stock, modified, ---as Keith says ---originally no "seal" ---and many other causes, easiest fix is if the oil fill cap is pushed down too far.

When mine started to leak some more than it should the babbitt in the cap had crumbled.
now it will only leak if the oil level is too high ---if I keep the level the width of the "F" below it --no leak more than a random drop as designed.

The upper "seal" could be changed in the car in most cases, but a better job of fitting can be done without the crankshaft installed.

mll1446 · 02-10-2013, 04:46 PM

It's a stock 3O coupe

Mike V. Florida · 02-11-2013, 01:23 AM

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Quote:

Originally Posted by mll1446

It's a stock 3O coupe

It really is easy to remove the engine. Borrow a host, or four strong friends to lift it, and you can place it on an old tire so you can work on it.

I've done it with a host and engine stand alone many times.

George Miller · 02-11-2013, 08:12 AM

There is no seal. If it is leaking a lot of oil. Things to check.
To much end play in crank.
To much clearance in rear main. Take out some shims.
Oil return plugged in cap.
Oil return pipe screwed to far in cap.
Bottom of rear main cap not flat.
Broken rear main thrust.

Also it could be coming from the cam shaft.
No gasket between engine and flywheel housing.
Some engines the bolts that hold the housing on go all the way in to the engine. On those engines you need to use a sealer on those bolts.

Special Coupe Frank · 02-11-2013, 08:32 AM

Quote:

Originally Posted by mll1446

Can a Rear main oil seal be changed while engine in car?

Sure !

Jazzjr · 02-11-2013, 11:41 AM

Rear Main Oil Seal

The original type cast aluminum insert. This is the insert that goes up into the block. It is best to replace this when overhauling a motor.
Part Number A-6335 1928-31 $12.50 / ea.

Some say their is no Rear Main Seal, I was always told that this was ths Seal.
http://www.snydersantiqueauto.com/1422 Rear Main Oil Seal @ Snyders

02-10-2013, 02:07 PM	#1
mll1446 Senior Member Join Date: May 2010 Location: Palatine il Posts: 320	Rear main oil seal be changed while engine in car? Can a Rear main oil seal be changed while engine in car?

02-10-2013, 02:08 PM	#2
txturbo Senior Member Join Date: Feb 2013 Location: Houston Posts: 111	Re: Rear main oil seal be changed while engine in car? depends on the car

02-10-2013, 02:46 PM	#3
Keith True Senior Member Join Date: May 2010 Location: Epping N.H. Posts: 2,989	Re: Rear main oil seal be changed while engine in car? If it's an A,not really,as the A doesn't have a rear seal.It has a slinger,or baffle as some call it.If you have a leak it is worn babbit,gasket around the cam hole,missing drain tube,and a half dozen other things.My money would be on bad babbit.

02-10-2013, 04:17 PM	#4
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Rear main oil seal be changed while engine in car? It all depends ---stock, modified, ---as Keith says ---originally no "seal" ---and many other causes, easiest fix is if the oil fill cap is pushed down too far. When mine started to leak some more than it should the babbitt in the cap had crumbled. now it will only leak if the oil level is too high ---if I keep the level the width of the "F" below it --no leak more than a random drop as designed. The upper "seal" could be changed in the car in most cases, but a better job of fitting can be done without the crankshaft installed.

02-10-2013, 04:46 PM	#5
mll1446 Senior Member Join Date: May 2010 Location: Palatine il Posts: 320	Re: Rear main oil seal be changed while engine in car? It's a stock 3O coupe

02-11-2013, 08:12 AM	#7
George Miller Senior Member Join Date: May 2010 Location: NC Posts: 2,975	Re: Rear main oil seal be changed while engine in car? There is no seal. If it is leaking a lot of oil. Things to check. To much end play in crank. To much clearance in rear main. Take out some shims. Oil return plugged in cap. Oil return pipe screwed to far in cap. Bottom of rear main cap not flat. Broken rear main thrust. Also it could be coming from the cam shaft. No gasket between engine and flywheel housing. Some engines the bolts that hold the housing on go all the way in to the engine. On those engines you need to use a sealer on those bolts.

02-11-2013, 11:41 AM	#9
Jazzjr Senior Member Join Date: May 2010 Location: Crown Point, NY and Punta Gorda, FL. Posts: 259	Re: Rear main oil seal be changed while engine in car? Rear Main Oil Seal The original type cast aluminum insert. This is the insert that goes up into the block. It is best to replace this when overhauling a motor. Part Number A-6335 1928-31 $12.50 / ea. Some say their is no Rear Main Seal, I was always told that this was ths Seal. http://www.snydersantiqueauto.com/1422 Rear Main Oil Seal @ Snyders