410 428 rear main seal?
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Logistics Pro
Joined: Jun 2004
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From: South Central Utah
410 428 rear main seal?
The 410 in my truck was made in 1966.
Mercury took the crank from a 428, which was first produced in 1966 and put it in a 390 making the 390 a 410.
I need to replace the rear mail seal that is leaking.
What I need to know is the rear main in my 410 a rope type seal or a 2-piece??
They list both.
Mercury took the crank from a 428, which was first produced in 1966 and put it in a 390 making the 390 a 410.
I need to replace the rear mail seal that is leaking.
What I need to know is the rear main in my 410 a rope type seal or a 2-piece??
They list both.
5th Wheeling
Joined: Apr 2013
Posts: 27
Likes: 26
My story
The '67 428 in mine is a 2 piece also. When I pulled the engine to reseal it I was a little surprised to find a rope seal in it. Don't know why, I guess I just didn't expect it.
I did notice from witness marks on the crank that at some point there had been a 2 piece seal installed but it had been installed backwards. Since I already had the 2 piece I went ahead and installed it the correct way.
6 years and 30k later, no problems.
If you go from a rope seal to a 2 piece you will have to remove the small pin in the seal groove of the cap (If it is in there. Mine was already pulled).
I did notice from witness marks on the crank that at some point there had been a 2 piece seal installed but it had been installed backwards. Since I already had the 2 piece I went ahead and installed it the correct way.
6 years and 30k later, no problems.
If you go from a rope seal to a 2 piece you will have to remove the small pin in the seal groove of the cap (If it is in there. Mine was already pulled).
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Logistics Pro
Joined: Jun 2004
Posts: 4,763
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From: South Central Utah
Thank you 440sixpack and AmerigoHauler. I'll get both seals like I had planned.
Just curious and hoping its not a rope.
The engine was rebuilt in 1972 and sat ad was never started until I started it last year.
I did have to replace the valve stem seals that dried out so I guess that's what happened to the rear mail seal.
AmerigoHauler, awesome camper.
Just curious and hoping its not a rope.
The engine was rebuilt in 1972 and sat ad was never started until I started it last year.
I did have to replace the valve stem seals that dried out so I guess that's what happened to the rear mail seal.
AmerigoHauler, awesome camper.
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