LS cam bearing failures

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machinedave
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LS cam bearing failures

Post by machinedave » Fri Jul 17, 2015 7:00 pm

Lately in the shop I have seen some 6.0l GM engines come in with spun cam bearings that have caused a few otherwise good cores to be useless. Is anybody making an oversized OD cam bearing set for these blocks? If not does anyone know of any other fixes?

1972ho
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Re: LS cam bearing failures

Post by 1972ho » Fri Jul 17, 2015 7:39 pm

Roller cam bearing

engineguyBill
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Re: LS cam bearing failures

Post by engineguyBill » Sat Jul 18, 2015 10:12 am

machinedave wrote:Lately in the shop I have seen some 6.0l GM engines come in with spun cam bearings that have caused a few otherwise good cores to be useless. Is anybody making an oversized OD cam bearing set for these blocks? If not does anyone know of any other fixes?
Durabond has some oversize OD cam bearings available. Not sure about LS applications though. Give them a call.
Bill

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Re: LS cam bearing failures

Post by A_VAS » Mon Jul 20, 2015 4:03 pm

last I had a problem, Durabond did have .020 undersized ID bearings for the LS. Bored them to size

Now for the OD problem, not sure what you will get into
too lazy to make power w/o boost

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Re: LS cam bearing failures

Post by machinedave » Mon Jul 20, 2015 4:10 pm

I can get another 6.0L for about $400 so I have to consider the cost of the oversize OD bearings and the machining to oversize the housing bores but it is so hard for me to give up on a "patient".

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Re: LS cam bearing failures

Post by machinedave » Thu Jun 07, 2018 10:46 am

I just discovered a set of oversize OD LS cam bearings. Durabond part number CHP-25R1.

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Re: LS cam bearing failures

Post by In-Tech » Thu Jun 07, 2018 11:51 am

More Durabond info for LS, cam saver and block saver info as well as some replacement parts.
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Re: LS cam bearing failures

Post by BILL-C » Thu Jun 07, 2018 12:30 pm

Which cam b location spun? We just fixed an LSX block by boring spun housing bore for bearing for a different location that was .020 bigger od.
Carlquist Competition Engines

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Re: LS cam bearing failures

Post by machinedave » Fri Jun 08, 2018 10:10 am

BILL-C wrote:
Thu Jun 07, 2018 12:30 pm
Which cam b location spun? We just fixed an LSX block by boring spun housing bore for bearing for a different location that was .020 bigger od.
Its usually the #3 housing bore. I've thought about that too. Did you have good alignment after boring just the center?

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Re: LS cam bearing failures

Post by BILL-C » Fri Jun 08, 2018 11:20 am

Yes, good alignment. Cam bearing squirmed out towards back, leaving a small, un-damaged area to measure and center up on. We used .0055 press fit.
Carlquist Competition Engines

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