Cam bearing bore shot in BB, how to fix?
#3190367
11/12/23 05:17 AM
11/12/23 05:17 AM
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Joined: Jan 2003
Posts: 2,935 Finalnd, Perkele
jyrki
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Hi! Had a cam bearing failure in my Indy aluminum block. It went so bad that the block actually have melted a little in the #3 and 4 cam bearing bores, so just can't install new bearings. Others are ok. You can't get it welded either, no room for that.
So, does someone make needle bearing cams (and bearings) for a bigblock? It could be one solution to drill the cam tunnel bigger for roller bearings.
Any other ideas?
Plynouth VIP '67 TT IC EFI
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Re: Cam bearing bore shot in BB, how to fix?
[Re: Stanton]
#3190413
11/12/23 11:47 AM
11/12/23 11:47 AM
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Joined: Mar 2003
Posts: 9,108 Rogue River, OR
Jeremiah
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Rogue River, OR
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Your choices are 55mm roller or 60mm babbit. I like babbit however there can be some caveats. Is the block standard cam height or +.250? I would give Indy a call in this one.
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Re: Cam bearing bore shot in BB, how to fix?
[Re: John Brown]
#3190437
11/12/23 12:58 PM
11/12/23 12:58 PM
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Joined: Jan 2003
Posts: 4,292 Morrow, OH
markz528
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Morrow, OH
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If it were mine, I would probably attempt to sleeve it. I assume there is enough meat there for a sleeve - I would leave a slight shoulder for the sleeve to rest against. I would do it on a horizontal boring mill. Trickiest part is the setup.
Tony Bischoff (BES) is my engine builder. I would trust whatever he says. Why don't you send him an email and ask?
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: Cam bearing bore shot in BB, how to fix?
[Re: AndyF]
#3190449
11/12/23 02:35 PM
11/12/23 02:35 PM
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Joined: Aug 2003
Posts: 43,352 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
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Bend,OR USA
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Last edited by Cab_Burge; 11/12/23 02:38 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Cam bearing bore shot in BB, how to fix?
[Re: Cab_Burge]
#3190481
11/12/23 04:49 PM
11/12/23 04:49 PM
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Joined: Jan 2003
Posts: 7,499 Minnesota
Hemi_Joel
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Minnesota
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Can you find anyone with a portable line bore machine like this? 60mm cam bearings and cam cores are available. Or use it to overbore for sleeves.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Cam bearing bore shot in BB, how to fix?
[Re: Hemi_Joel]
#3190490
11/12/23 05:25 PM
11/12/23 05:25 PM
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Joined: Jan 2003
Posts: 6,151 Melbourne , Australia
LA360
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Melbourne , Australia
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The bore for a 60mm roller bearing is going to be 68mm from memory. A babbit bearing bore will be around 63mm. Obviously a 55mm babbit bore will be smaller, but I don't believe Cam cores to be as plentiful. If you have to replace the camshaft as well, this might be the best option??
Alternatively, you can sleeve the number 3, 4 and 5 bores to facilitate the repair. Maybe pin them with some aluminium rod to minimise the possibility of the sleeves moving.
Alan Jones
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Re: Cam bearing bore shot in BB, how to fix?
[Re: Cab_Burge]
#3190545
11/12/23 10:57 PM
11/12/23 10:57 PM
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Joined: Jan 2003
Posts: 4,292 Morrow, OH
markz528
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Morrow, OH
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Don't forget he is in Finland Finland????? LOL! I know - he was kind enough to give me a beer when I visited him........ Got nothing but the highest respect for what they do.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: Cam bearing bore shot in BB, how to fix?
[Re: Cab_Burge]
#3190564
11/13/23 05:04 AM
11/13/23 05:04 AM
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Joined: Jan 2003
Posts: 6,151 Melbourne , Australia
LA360
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Melbourne , Australia
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Can you find anyone with a portable line bore machine like this? 60mm cam bearings and cam cores are available. Or use it to overbore for sleeves. I'm wondering how many people on here recognize what era, years and brand block that pictures is of Hint it isn't recent and it is not a Mopar brand block A favourite of a lot of early Hot Rodders!
Alan Jones
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Re: Cam bearing bore shot in BB, how to fix?
[Re: LA360]
#3190573
11/13/23 09:13 AM
11/13/23 09:13 AM
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Joined: Jan 2003
Posts: 2,935 Finalnd, Perkele
jyrki
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Yes, the cam is shot too, so have to get new one or two anyway. So,only the available cam core is the limit for the cam bearings that will be used.
Plynouth VIP '67 TT IC EFI
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Re: Cam bearing bore shot in BB, how to fix?
[Re: jyrki]
#3190608
11/13/23 01:26 PM
11/13/23 01:26 PM
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Joined: Dec 2006
Posts: 2,126 Byron, NY
W.I.N. Racing
top fuel
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Byron, NY
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My KB blocks didn't have cam bearings (other than the bores that had been repaired) , ran on the machined block material. An option may be to open the bores and have straight aluminum bushings pressed in and re line hone. Tap the feed hole(s) in the block, then drill out a dog point set screw as an anti rotation pin.
'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: Cam bearing bore shot in BB, how to fix?
[Re: moparx]
#3190849
11/14/23 02:42 PM
11/14/23 02:42 PM
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Joined: Jan 2003
Posts: 7,499 Minnesota
Hemi_Joel
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Minnesota
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Close. It's a Lincoln 337 flathead. Basically a big block version of the Ford flathead.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Cam bearing bore shot in BB, how to fix?
[Re: moparx]
#3190895
11/14/23 05:40 PM
11/14/23 05:40 PM
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Joined: Aug 2003
Posts: 43,352 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,352
Bend,OR USA
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Can you find anyone with a portable line bore machine like this? 60mm cam bearings and cam cores are available. Or use it to overbore for sleeves. I'm wondering how many people on here recognize what era, years and brand block that pictures is of Hint it isn't recent and it is not a Mopar brand block A favourite of a lot of early Hot Rodders! ford flathead, 8BA block maybe ? 8 AB maybe I can't tell without seeing the top of the motor to see if it had a cam driven distributors on the front of the motor or the later top mounted distributor and I don't know how to tell the differences visibly between the Ford and Mercury blocks, let alone the bigger Lincoln blocks I started getting interested in cars in the later 1950s, I especially liked the 1958 Chevy Impalas, still do
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Cam bearing bore shot in BB, how to fix?
[Re: LA360]
#3191599
11/17/23 01:21 PM
11/17/23 01:21 PM
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Joined: Jan 2003
Posts: 2,935 Finalnd, Perkele
jyrki
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Finalnd, Perkele
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Seems that the camcores for BB rollerbearings is next to impossible to find. So far one offer for 54mm bearings, 1500$.
Plynouth VIP '67 TT IC EFI
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Re: Cam bearing bore shot in BB, how to fix?
[Re: jyrki]
#3191626
11/17/23 03:35 PM
11/17/23 03:35 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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The direction I’d be leaning would be to bore & sleeve the two bad cam bores back to the original sizes.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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