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Re: do you oil the back side of a bearing shell?
[Re: CompWedgeEngines]
#982555
04/29/11 08:44 PM
04/29/11 08:44 PM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
OP
Paddle faster! I hear banjo music!
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OP
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Quote:
No.
Crush is set by the actual ID of the bearing bore period. The bore is measured dry, and bearings are installed dry ( backside). Anything that is not the original parent bore, shouldnt be there, including dust, schars of metals, lint,. paper towel fragments etc.It also always a good idea to take a dressing stone and lightly champher all the outside edges of the bearing bores, as often ( especially newly reconditioned rods) they can slightly mushroom there and actually hold the bearing up slightly. 
This was my line of thinking however, almost any factory service manual I've read says to oil both sides. I don't understand why but I'm not an engineer, just a flat rate tech.
I appreciate all the opinions and responses, the reason I asked is because I plan to assemble my 408 short block this weekend and if there was a compelling reason to do it one way or the other I wanted to hear it.
Thanks all, I guess I'll just install them clean and dry on the backside.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: do you oil the back side of a bearing shell?
[Re: Guitar Jones]
#982556
04/29/11 11:11 PM
04/29/11 11:11 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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I guess if oil gets back there anyway, it's pretty much of a moot point? If you put them in dry, and the saddles are dry and all stays dry, thats bare steel on bare cast iron, and in an environment that propagates moisture drop out, that = corrosion. JMO.
Fastest 300
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Re: do you oil the back side of a bearing shell?
[Re: Crizila]
#982558
04/29/11 11:40 PM
04/29/11 11:40 PM
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Joined: Dec 2005
Posts: 11,608
Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,608
Fulton County, PA
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Lightly clean backside with fine Scotchbrite in parts washer to polish, remove burrs, etc.
Wash in parts washer.
Wipe clean with paper towel with lacquer thinner and blow and clean with compressed air.
Wipe block or rod bore clean with paper towel and lacquer thinner and blow dry and clean with compressed air.
Install bearing shell dry. Tap lightly on ends to seat.
Oil with assembly lube of choice just before assembling.
If the results don't match the theory, change the theory.
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Re: do you oil the back side of a bearing shell?
[Re: hemigod426]
#982560
04/30/11 03:28 AM
04/30/11 03:28 AM
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Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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Dry always.I did know of some experiments builders tried with various liquids back in the day.No difference in performance.
Leave the gun.......take the Cannoli's....Mike
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