Everyone needs to be humbled now and then.What is the trick?FE rear mainseal How to do it right? help
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eggman918
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FE rear mainseal How to do it right? help
To start with I am a machinist/maintenance mechanic of many moons and have installed every type of seal imaginable...how ever in the last 5 or 6 FE builds the damn seal leaks. Everyone needs to be humbled now and then.What is the trick?
Everyone needs to be humbled now and then.What is the trick?Steve
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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fordman
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Re: FE rear mainseal How to do it right? help
i've never done it. but isn't it a rope seal? in 2 pieces? if so i think you have to off set the seams on the seal with the bearign cap so the gaps don't line up.
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70_F100
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Re: FE rear mainseal How to do it right? help
Since the replacements are a split rubber seal, Fordman is partially right.
Remove the old seal and clean the seal bore in the block and in the main bearing cap.
Install the top half of the seal by pushing it into the seal bore/groove. You may have to rotate the crankshaft while doing this.
Place the bottom half in place ON THE CRANKSHAFT, not in the bearing cap.
Rotate the entire seal 15-20 degrees or so, so that the ends do not align with the bearing cap mating surface.
Install the bearing cap and torque to specs.
I've installed hundreds of these seals in all brands of engines, and following this procedure, I've never had one to leak!!
Remove the old seal and clean the seal bore in the block and in the main bearing cap.
Install the top half of the seal by pushing it into the seal bore/groove. You may have to rotate the crankshaft while doing this.
Place the bottom half in place ON THE CRANKSHAFT, not in the bearing cap.
Rotate the entire seal 15-20 degrees or so, so that the ends do not align with the bearing cap mating surface.
Install the bearing cap and torque to specs.
I've installed hundreds of these seals in all brands of engines, and following this procedure, I've never had one to leak!!
Wise men talk because they have something to say; fools talk because they have to say something.--Plato
Why is it that there's seldom time to fix it right the first time, but there's always time to fix it right the second time???
That's not an oil leak
That's SWEAT from all that HORSEPOWER!! 
Why is it that there's seldom time to fix it right the first time, but there's always time to fix it right the second time???
That's not an oil leak
That's SWEAT from all that HORSEPOWER!! -
DuckRyder
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Re: FE rear mainseal How to do it right? help
And throw the side seals and nails away, clean all parts meticulously and use "The Right Stuff" for the side seals.
Robert
1972 F100 Ranger XLT (445/C6/9” 3.50 Truetrac)
"An unarmed man can only flee from evil, and evil is not overcome by fleeing from it." -- Jeff Cooper
1972 F100 Ranger XLT (445/C6/9” 3.50 Truetrac)
"An unarmed man can only flee from evil, and evil is not overcome by fleeing from it." -- Jeff Cooper
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eggman918
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Re: FE rear mainseal How to do it right? help
That is how I did it...Hell now I feel even worse.70_F100 wrote:Since the replacements are a split rubber seal, Fordman is partially right.
Remove the old seal and clean the seal bore in the block and in the main bearing cap.
Install the top half of the seal by pushing it into the seal bore/groove. You may have to rotate the crankshaft while doing this.
Place the bottom half in place ON THE CRANKSHAFT, not in the bearing cap.
Rotate the entire seal 15-20 degrees or so, so that the ends do not align with the bearing cap mating surface.
Install the bearing cap and torque to specs.
I've installed hundreds of these seals in all brands of engines, and following this procedure, I've never had one to leak!!
I guess it is time to try again. here is a pic so people see what we are dealing with Thanks to everyone for putting up with All of my questionsYou do not have the required permissions to view the files attached to this post.
Steve
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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eggman918
- Blue Oval Guru
- Posts: 1098
- Joined: Fri Nov 20, 2009 12:56 pm
- Location: Paulden,AZ.
Re: FE rear mainseal How to do it right? help
I will try thatDuckRyder wrote:And throw the side seals and nails away, clean all parts meticulously and use "The Right Stuff" for the side seals.
Steve
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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BobbyFord
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Re: FE rear mainseal How to do it right? help
Since nobody said it yet, it's best to pull the engine to do this properly. If pressed for time (or doing this under warranty 
) it is easier and more effective to yank the motor. This will also allow you to easily fix any other leaks such as, intake, timing cover, etc. When I pulled my 360 for a rear main leak, I replaced the following: rear main seal, oil pump, timing chain, gears and gaskets, intake gasket, valve cover gaskets, valve seals and water pump. I now have piece of mind, better oil pressure and no oil leaks. (Incidentally, that was less than 100 miles ago on this 60,000 mile motor that I will be selling because of the 500 hp, 466" transplant taking place next month).
) it is easier and more effective to yank the motor. This will also allow you to easily fix any other leaks such as, intake, timing cover, etc. When I pulled my 360 for a rear main leak, I replaced the following: rear main seal, oil pump, timing chain, gears and gaskets, intake gasket, valve cover gaskets, valve seals and water pump. I now have piece of mind, better oil pressure and no oil leaks. (Incidentally, that was less than 100 miles ago on this 60,000 mile motor that I will be selling because of the 500 hp, 466" transplant taking place next month).