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#81968 08/24/2007 8:01 PM | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | I have a problem, I need to know the diameter of the rear main seal on the crank. I have a leaky rear main that just won't go away, The crank is pitted in that area and just tears up main seals.. There is a bushing that can be fitted over the serface but I can't get the bushing unless I know the exact size of the seal journal.I can't measure mine without dropping the crank. 350 engine about 72.
anyone have a old crank laying aroung that you could measure?? HELP | | |
#81969 08/24/2007 9:57 PM | Joined: Oct 2001 Posts: 130 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2001 Posts: 130 | i got 2.430 on two cranks here.
our garage is a non-profit organization
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#81970 08/25/2007 12:52 AM | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Thank you much, If anyone has a different answer please jump in here/ | | |
#81971 08/25/2007 4:06 AM | Joined: Feb 2004 Posts: 29,777 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,777 | How are you going to get a repair sleeve over the flywheel flange? The late-model crankshafts that use a 1-piece seal might work with a repair sleeve, but I just can't imagine how to make that repair work with an early style crank.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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#81972 08/26/2007 1:38 PM | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Yup, the repair sleeve is what I am trying to find the size for. I don't know what you are refering to "early" the engine probably is about a 72 era, book shows it a crate engine that covered 15 years. | | |
#81973 08/26/2007 3:26 PM | Joined: Feb 2004 Posts: 29,777 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,777 | On the pre-1991 V-8's, the flange where the flywheel bolts is roughly rectangular, and MUCH bigger than the seal surface. In about 91 or so, Chevy went to a 1-piece seal similar to an oversized wheel bearing seal, in an alloy carrier that bolts to the back of the engine block. There's simply no way to get a repair sleeve onto the rear seal area of a pre-91 crank, unless it has a split in it, and the joint of the ring would destroy its usefulness as a smooth sealing surface. There is a "speedy sleeve" repair for harmonic balancers with wear grooves in them, but that's on the front of the engine, and has nothing to do with the crankshaft.
A good automotive machine shop could weld up a worn seal area, and regrind it smooth, but the cost would be approximately twice what a new Eagle crank would cost on Ebay.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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#81974 08/27/2007 1:40 PM | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Will take it back to the guy that charged me $200 to replace the seal(2 piece) If nothing can be done, I guess I will have to live with a leaker?? Thanks. | | |
#81975 08/30/2007 1:42 AM | Joined: Apr 2006 Posts: 159 Shop Shark | | Shop Shark Joined: Apr 2006 Posts: 159 | Why not weld it and regrind or you may be able to grind the flange off and install a 1 piece repair sleeve.Does your existing crank have a knurl ? You need a knurl either on the crank or the seal or both.If don't the seal has no direction to direct the oil.If you decide to purchase a sleeve contact me and I can put you in touch with a supplier Classic Sleeve.
In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .
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#81976 08/30/2007 3:07 AM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | 87 was the year of the crank change to the one-piece. The fella might have torn the seal or something, I would try another seal first. | | |
#81977 08/30/2007 2:30 PM | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | Going to go back and try the old rope seal. The crank had been setting around for awhile and has rust pits on the sealing surface. I really hate to pull it out for a oil leak. Thanks for the good advice all especially Brian and fleetside, You have me rethinking the problem | | |
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