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Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Power Train Tech Forum -> 327 rear main seal question
Post Info TOPIC: 327 rear main seal question
65 SD L79


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327 rear main seal question
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does the 327 small and large journal crank use the same rear main seal?



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beaumontguru


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Yes, as far as i know all SBC rear mains are the same until you get into the 1986 one piece versions



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Beaumontguru

MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH.  The other one has a longer roof.
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65 SD L79


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What brand is the best?



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ARCADIAN


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I have only used Fel Pro

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4SPEED427


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Fel Pro, Victor or original GM for me. All have been fine.

The one issue I've had with a rear main seal leak was when the crank had a minor amount of wear on it where the rear seal contact area was.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
beaumontguru


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Ya the blue(sometimes grey) felpro is what i always use.   i offset the seal from the parting line about a 1/4 inch and be sure to seal the parting surfaces.



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Beaumontguru

MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH.  The other one has a longer roof.
ARCADIAN


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Yes beaumontguru is correct offset the seal and clean and seal the surfaces.

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65 SD L79


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All good info, thanx guys



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65 SD L79


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off topic but whos oil pump wound you use for a stock 283?



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ARCADIAN


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mellings high volume

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4SPEED427


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70 SS ACADIAN wrote:

off topic but whos oil pump wound you use for a stock 283?

 I always use a stock pump, Melling brand. So far they've always been perfect.



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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