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| | | | Joined: May 2007 Posts: 226 'Bolter | | 'Bolter Joined: May 2007 Posts: 226 | I’m at what little I have of my wits’ end. I have a 1964 Chevy 327 in my 57 NAPCO truck. The engine has about 200 miles on a rebuild. It runs well, but I have a leak that appears to be coming from the rear main seal area. I replaced the standard 2 piece seal with an offset type from FelPro, and I have the same leak. I used tracer dye and I don’t see any other evidence of leaking other than around the engine side of the flywheel. The crank was ground .020” if that is a clue. My PCV system passed the pinch test on the hose and nothing’s blowing out of the oil fill tube.
Thanks for any ideas.
Larry | | | | | Joined: Mar 2007 Posts: 3,433 Crusty Old Sarge | | Crusty Old Sarge Joined: Mar 2007 Posts: 3,433 | Was the seal surfaced machined as well? Could be you need to use a Redi Sleeve on the seal surface.
~ Craig 1958 Viking 4400"The Book of Thor"Read the story in the DITY1960 Chevrolet C10"A Family Heirloom"Follow the story in the DITY Gallery'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting) If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane | | | | | Joined: May 2007 Posts: 226 'Bolter | | 'Bolter Joined: May 2007 Posts: 226 | The surface of the crank is smooth all over, but there’s a barely noticeable step between the seal surface and the bearing surface which is why I tried the offset seal. I suppose I’ll need to take it apart again and check where the seal hits relative to the step. I thought I did that, but at my age who knows. | | | | | Joined: Feb 2004 Posts: 29,851 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,851 | A 327 V8 can't use a speedy sleeve- - - -the flywheel flange is bigger than the seal surface area. Try gluing a strip of shim stock to the back side of the seal to squeeze it a little tighter against the crankshaft. Use high temperature epoxy, which should be pretty oil-resistant.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: May 2007 Posts: 226 'Bolter | | 'Bolter Joined: May 2007 Posts: 226 | Thanks for clarifying that. I was wondering how I could do that. I’ll try the shim and let you know | | |
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