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do you oil the back side of a bearing shell?
#982535
04/29/11 01:55 PM
04/29/11 01:55 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
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in a cattle trailer down by th...
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I never have but I've seen others that do so what's your opnion?
"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: JohnRR]
#982537
04/29/11 02:14 PM
04/29/11 02:14 PM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Nope,I wipe mine clean and install them dry,then lube the bearing surface. I want nothing between the back of the bearing and it's mating surface so it can transfer heat out as well as possible.  Keith
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Re: do you oil the back side of a bearing shell?
[Re: Dunnuck Racing]
#982538
04/29/11 02:20 PM
04/29/11 02:20 PM
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Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
chryco
super stock
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super stock
Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
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Nope,I wipe mine clean and install them dry,then lube the bearing surface. I want nothing between the back of the bearing and it's mating surface so it can transfer heat out as well as possible. Keith 
Last edited by chryco; 04/29/11 02:21 PM.
Gas is fer washin' parts ....Alky`s fer drinkin' ...Nitro`s fer Racin'!
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Re: do you oil the back side of a bearing shell?
[Re: Crizila]
#982545
04/29/11 05:43 PM
04/29/11 05:43 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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Interesting comments. The way I looked at it is that with oil on the backside there may be a tendancy for a little extra crush on the bearing. If or when that oil eventually vacates the saddle it may leave the bearing shell just a tad looser and since the crush is the only thing that keeps that bearing from spinning it doesn't seem like a good idea to me.
"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: rowin4]
#982549
04/29/11 05:46 PM
04/29/11 05:46 PM
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Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
Steve1118
master
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master
Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
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I go even further....it's probably overkill, but I dip the bearing shell in lacquer thinner, then use a rag dipped in lacquer thinner to wipe the saddle clean before installing the shell. I've done it that way for forty years. So....absolutely not. No oil or substance of any kind between the shell and the saddle. 
Last edited by Steve1118; 04/29/11 05:48 PM.
"Old age and treachery trumps youth and enthusiasm, every time!" East Central Director / Chrysler Power Magazine www.reasbeckracing.webs.com
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Re: do you oil the back side of a bearing shell?
[Re: Guitar Jones]
#982550
04/29/11 05:47 PM
04/29/11 05:47 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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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. 
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: do you oil the back side of a bearing shell?
[Re: CompWedgeEngines]
#982551
04/29/11 05:58 PM
04/29/11 05:58 PM
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Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
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Leave em dry but I clean the bearing surfaces with ATF, not for lubrication but for corrosion resistance as I would with any newly machined surface exposed to atmosphere and moisture. I also swab all the cylinder and lifter bores with ATF until every bit of grit/dust/dirt is out of them and they wipe perfectly clean before assembly. ATF on a white cloth shows eveen the slightest bit of dirt plus it's so thin it cleans all the nooks and crannies.
Probably old school as all get out but that's my gig and I ain't blowed one up yet!! grin:
Last edited by Streetwize; 04/29/11 06:01 PM.
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Re: do you oil the back side of a bearing shell?
[Re: FastmOp]
#982553
04/29/11 07:04 PM
04/29/11 07:04 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
Yep. I didn't till Garlits told me too lol. He said it gets back there anyway 
I allways put them in as dry and as clean as possible. Thinking that, it would give more resistance to spinning the bearing in a low oil psi situation.
Last month I was having some fitness issues with some mains on a RB and had the crank in and out several times.
No matter how clean I got the back side of the bearing, and its saddle. The oil found its way back there. They were clean when I put them in, but they had lube between the bearing and saddle after everytime I took them out. 
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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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