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Old 01-13-2007, 09:15 PM
406 ss monte's Avatar
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rear main seal ate up my crank

i've got a crank out of a 1 piece rear main 305 block & the rear main seal has ate two grooves in the rear of the crank where the seal rides. i was wondering how this is fixed? do they make a sleeve for it like they do balancers? do i have it welded & reground? do i trash it? it's a cast crank, but i still hate to just trash it.

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Old 01-14-2007, 05:50 AM
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u should be able to buy a redi-sleeve kit for it like u would for a harmonic balancer.. ive installed several of them in my time...
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Old 01-14-2007, 09:46 AM
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The easiest option is a rear seal with an offset lip to make contact with the unworn part of the journal.

There's no way that I know of to repair the crank aside from welding and it would be about the same cost to buy a new crankshaft.



Larry
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Old 01-14-2007, 10:03 AM
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I would second the redi-sleeve suggestion. They are stainless steel and very thin, they work great. I have used them on sevral applications, the last one was on an MG-TD crank. They are made for all sorts of applications where ther is excess wear on a seal area. They are made for harmonic balancer noses that get too worn from the seal as well.
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Old 01-14-2007, 10:20 AM
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Yes, they do make a speedi-sleeve for that application (assuming it's a 1989 305).

NAPA (C/R) Part Number 99364 is what you want.
Be prepared to grab your ankles, though ... they ain't cheap.
Looks like $42.00 US, which is less than I thought.

HTH, Don

Last edited by 66GMC; 01-14-2007 at 10:25 AM.
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Old 01-14-2007, 10:23 AM
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the sleeve is what i'm wanting to use, but i can't find one for a late model chevy 350-305. anyone have a part number or know where i can get one? auto zone says they don't make them for a late 305-350. i might have to get a offset rear seal. do you have a part number for it? thanks guy's
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Old 01-14-2007, 10:25 AM
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Quote:
Originally Posted by 66GMC

Yes, they do make a speedi-sleeve for that application (assuming it's a 1989 305).

NAPA (C/R) Part Number 99364 is what you want.
HTH, Don

thanks buddy. your my new best friend LOL. i'll have one tomorrow.
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Old 01-14-2007, 12:32 PM
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Take the rear main housing to a machine shop and have them bore the seal area an 1/8 inch deeper, this moves the seal to a good area on the crank. I have done this myself to 2 350's and it works great!
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Old 01-14-2007, 01:50 PM
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Quote:
Originally Posted by chrisape
Take the rear main housing to a machine shop and have them bore the seal area an 1/8 inch deeper, this moves the seal to a good area on the crank. I have done this myself to 2 350's and it works great!
That's a good idea! I'm gonna try one Monday.

tom
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Old 01-14-2007, 02:08 PM
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I made a jig from a 6" x 6" plate of CRS, tapped 4 holes in the plate, mounted the rear seal housing, indicated the center, and bored it with a Bridgeport. Super easy and works great!
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Old 01-14-2007, 05:15 PM
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Quote:
Originally Posted by coldknock
The easiest option is a rear seal with an offset lip to make contact with the unworn part of the journal.

There's no way that I know of to repair the crank aside from welding and it would be about the same cost to buy a new crankshaft.



Larry
do you have a part number on the offset seal? the sleeve is $41.00 & then i would still need a rear seal. thats to expensive.
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Old 01-18-2007, 06:18 PM
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do you have a part number on the offset seal? the sleeve is $41.00 & then i would still need a rear seal. thats to expensive.
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Old 01-29-2007, 05:31 PM
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i found a repair sleeve at advance auto for $12.00.
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