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351 Rear Main 1 or 2 piece |
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Ken-Aus 
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Joined: April-13-2004 Location: Australia Status: Offline Points: 7 |
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 Topic: 351 Rear Main 1 or 2 piecePosted: September-15-2004 at 1:54am |
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I have a medium sized leak from the rear main in my 351 PCM. Should I use a 1 piece or 2 piece seal when I fix it? Also can the replacement be done without removing the crank?
Thanks for your help. Ken |
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Tim D
Grand Poobah 
Joined: August-23-2004 Location: United States Status: Offline Points: 2641 |
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Posted: September-15-2004 at 4:16pm |
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Older Ford blocks have a two piece seal. I think around 1980 they have one piece seals. An engine with two piece seals, the crank has directional lines that push oil back to the oil pan. An engine with a one piece seal, the crank is smooth and the seal has the directional lines. One piece seal, you need the marine,for reverse rotation and those I've seen are orange.
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Tim D
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