Re: Bearing "shelf life"
[Re: DoubleD]
#3105642
12/26/22 11:14 AM
12/26/22 11:14 AM
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Joined: Dec 2006
Posts: 2,112
Byron, NY
W.I.N. Racing
top fuel
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top fuel
Joined: Dec 2006
Posts: 2,112
Byron, NY
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What could possibly change?
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60
'01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust,
'05 Dodge Magnum R/T - Too Much to list
'60 Willys CJ5
'01 International LPX - Project,DT466, Allison
'64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: Bearing "shelf life"
[Re: Hot 340]
#3105651
12/26/22 11:31 AM
12/26/22 11:31 AM
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Joined: Mar 2011
Posts: 3,076
Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,076
Michigan
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I've read recently that NEW opened/unsealed engine bearings have a shelf life...even in a dry and CLEAN environment . What say ye? Never heard this before.
I guess some do have the date stamped on them after all. Date code is not only used for “shelf life”. Used for inventory control, recall, etc. If it makes you feel any better I have several sets of Mopar bearings left over that are in their original cardboard packages. I have used bearings from this collection, that are from the late 60’s. Not a problem with any of them. Likely the only threat to a bearing in storage is moisture and that should be evident. Acids in oil from use in an engine are likely more harsh than anything a bearing would see in storage.
Last edited by Transman; 12/26/22 01:44 PM.
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Re: Bearing "shelf life"
[Re: Hot 340]
#3105653
12/26/22 11:34 AM
12/26/22 11:34 AM
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Joined: Jul 2011
Posts: 957
Chicago
PurpleBeeper
super stock
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super stock
Joined: Jul 2011
Posts: 957
Chicago
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I've read recently that NEW opened/unsealed engine bearings have a shelf life...even in a dry and CLEAN environment . What say ye? Never heard this before.
I guess some do have the date stamped on them after all. Greased and in their original package? Their "shelf life" is longer than you will be alive, so don't worry about it.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: Bearing "shelf life"
[Re: Pacnorthcuda]
#3105725
12/26/22 03:46 PM
12/26/22 03:46 PM
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Joined: Oct 2007
Posts: 4,206
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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Ever heard of "tin whiskers"?
This is a phenomenon in which, under special circumstances, tin surfaces develop tiny branches (like a crystal) that grow outward and short out printed circuit boards.
Does it only happen with current flow? I don't know.
Boffin Emeritus
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Re: Bearing "shelf life"
[Re: polyspheric]
#3105728
12/26/22 04:02 PM
12/26/22 04:02 PM
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Joined: Jan 2003
Posts: 2,923
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,923
A shed in England
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Ever heard of "tin whiskers"?
This is a phenomenon in which, under special circumstances, tin surfaces develop tiny branches (like a crystal) that grow outward and short out printed circuit boards.
Does it only happen with current flow? I don't know. Current flow can occur with dissimilar metals.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Bearing "shelf life"
[Re: A727Tflite]
#3105743
12/26/22 05:02 PM
12/26/22 05:02 PM
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Joined: Dec 2006
Posts: 3,395
Pa
Hot 340
OP
master
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OP
master
Joined: Dec 2006
Posts: 3,395
Pa
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I've read recently that NEW opened/unsealed engine bearings have a shelf life...even in a dry and CLEAN environment . What say ye? Never heard this before.
I guess some do have the date stamped on them after all. Date code is not only used for “shelf life”. Used for inventory control, recall, etc. If it makes you feel any better I have several sets of Mopar bearings left over that are in their original cardboard packages. I have used bearings from this collection, that are from the late 60’s. Not a problem with any of them. Likely the only threat to a bearing in storage is moisture and that should be evident. Acids in oil from use in an engine are likely more harsh than anything a bearing would see in storage. Same. I have a bunch too from early 70's. Just seeing if anyone else heard this before
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Re: Bearing "shelf life"
[Re: Hot 340]
#3105792
12/26/22 09:14 PM
12/26/22 09:14 PM
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Joined: Nov 2005
Posts: 15,118
85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,118
85086
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Rant on shelf-life! When I was in the military quality assurance always harped shelf-life importance. For example an unopened tube of RTV that was expiring in 30 days would be sent to scrap. But if a mechanic used it on a jet engine that day it could fly for years with no problem. 
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: Bearing "shelf life"
[Re: Tig]
#3106319
12/29/22 11:08 AM
12/29/22 11:08 AM
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Joined: Jan 2003
Posts: 8,165
Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,165
Plymouth, MI
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Current flow can occur with dissimilar metals. x2. That's how thermocouples work, known dissimilar metals generate a small voltage and you can measure temperature if you know which metals are being used.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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![[Linked Image]](https://mattlewismotorsportonline.com/ekmps/shops/a191bf/images/pinto-mahle-engine-bearing-set-1254-p.jpg)
