Re: Help, I damaged a cam bearing
[Re: AMC400Mopar]
#1395096
02/28/13 04:02 PM
02/28/13 04:02 PM
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Joined: Aug 2003
Posts: 43,315
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
Bend,OR USA
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Quote:
I feel so dumb...I was carefully removing the stock camshaft a few minutes ago, but when it was about halfway out of the block I had a coughing and sneezing fit...I am recovering from the flu.
Anyway, I ended up deeply scratching the #2 and #3 cam bearings.
Hopefully someone knows a way to replace the cam bearings at home with the engine on the stand and without having to pull the crankshaft? I sure hope I don't need to take this engine completely apart and take the block to a machine shop...
thanks for your advice.
If that is the worst damage to both cam bearings I wouldn't worry about it, truthfully. The gouge, scrape, will act as a oil reservoir which will help lube the cam better   I've seen cam bearings a lot worst than that in running motors that had sat for along time that had acid damage to the babbit  Those motors ran great and had no oil pressure problems at all  It's up to you
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Help, I damaged a cam bearing
[Re: AMC400Mopar]
#1395098
02/28/13 04:04 PM
02/28/13 04:04 PM
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Joined: Jan 2003
Posts: 13,404
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,404
Marion, South Carolina [><]
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You can put new cam bearings in w/ the crank and rods still in the motor. Your local machine shop should be able to fix you up.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Help, I damaged a cam bearing
[Re: AMC400Mopar]
#1395101
02/28/13 04:20 PM
02/28/13 04:20 PM
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Joined: Aug 2003
Posts: 43,315
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
Bend,OR USA
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Quote:
Thanks guys! I thought I had really screwed myself. The one I took the picture of is by far the worst, number 2 has a comparatively light scratch you can see in this photo) The other bearings look new. Should I polish the scratched area of the bearings with something like a scotchbrite pad before I install the new cam? Oh, I mean "...install the new cam AFTER I stop sneezing and wheezing..."
I would install the new cam, if it slides in easy and turns easy run it  If it slides in hard and turns hard then remove it and remove the high points on the scrape and try again, keep doing that until it installs and turns smoothly
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Help, I damaged a cam bearing
[Re: Cab_Burge]
#1395102
02/28/13 04:39 PM
02/28/13 04:39 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Thanks guys! I thought I had really screwed myself. The one I took the picture of is by far the worst, number 2 has a comparatively light scratch you can see in this photo) The other bearings look new. Should I polish the scratched area of the bearings with something like a scotchbrite pad before I install the new cam? Oh, I mean "...install the new cam AFTER I stop sneezing and wheezing..."
I would install the new cam, if it slides in easy and turns easy run it If it slides in hard and turns hard then remove it and remove the high points on the scrape and try again, keep doing that until it installs and turns smoothly
As Cab said... put the cam in and see if it turns
freely... most (if not all) cam bearings need to be
sized anyways(I have a old cam with slots cut in to
spin in it)
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Re: Help, I damaged a cam bearing
[Re: perfmachst]
#1395104
02/28/13 05:35 PM
02/28/13 05:35 PM
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Joined: Jan 2003
Posts: 13,404
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,404
Marion, South Carolina [><]
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Quote:
hi, I install cam bearings in engines. only way to get bearing and sleeve in is from the bottom, where crank is at!!
I know it can be done b/c I've done it before. Several times actually, for people that didn't want to tear apart their shortblock.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Help, I damaged a cam bearing
[Re: perfmachst]
#1395105
02/28/13 05:56 PM
02/28/13 05:56 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
hi, I install cam bearings in engines. only way to get bearing and sleeve in is from the bottom, where crank is at!!
If you brought your motor to me and wanted new cam bearings I would not do it without removing the crank. I have been doing it longer than most of you.
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Re: Help, I damaged a cam bearing
[Re: Challenger 1]
#1395106
02/28/13 07:54 PM
02/28/13 07:54 PM
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Joined: Apr 2009
Posts: 3,426
Toronto
mshred
master
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master
Joined: Apr 2009
Posts: 3,426
Toronto
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I wouldn't feel safe running those, but thats just me. Oh, and I have done my cam bearings with the crank in also ...If you don't have the tool or are afraid to tackle it, im sure you machine shop can give you a hand
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I was thinking the same thing...........run it! 
