Camshaft bearings
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From: Norn Iron
Camshaft bearings There seems to be uncertain or conflicting info out there.
LS2 block....new to me around 2013-2014 or so, brand new at some point before that.
CH-23 seems to be the most common part number for LS2, although some also say CH-25 for the 6.0 LS2 ( and other variants too )
My previous LS2 engine had the narrow CH-23. I've just taken this newer block apart and it has the wider cam bearings fitted which would suggest CH-25 sizes. Whether the block supplier fitted these or GM...I do not know.
Although there are conflicting numbers quoted for the measurements of the 2 sets of bearings. Some with different diameters for differing positions, some almost the same....WTF.
I removed the rearmost position bearing, and there are no part numbers on the bearing.
LS2 block....new to me around 2013-2014 or so, brand new at some point before that.
CH-23 seems to be the most common part number for LS2, although some also say CH-25 for the 6.0 LS2 ( and other variants too )
My previous LS2 engine had the narrow CH-23. I've just taken this newer block apart and it has the wider cam bearings fitted which would suggest CH-25 sizes. Whether the block supplier fitted these or GM...I do not know.
Although there are conflicting numbers quoted for the measurements of the 2 sets of bearings. Some with different diameters for differing positions, some almost the same....WTF.
I removed the rearmost position bearing, and there are no part numbers on the bearing.
The #'s 1 & 5 bearings O.D.s are 2.3260" , the #'s 2 & 4 bearings O.D.'s are 2.3161" and the # 3 bearing O.D. is 2.3063"
Or at least I think I have the correct dimensions here. Basically 3 different sizes of bearings. This is why folks that try to line hone the cam tunnel, usually end up with spun cam bearings.
Or at least I think I have the correct dimensions here. Basically 3 different sizes of bearings. This is why folks that try to line hone the cam tunnel, usually end up with spun cam bearings.
Thread Starter
9 Second Club
Joined: Nov 2003
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From: Norn Iron
I agree, I'd rather have the wider bearings, especially as that was what was in there.
However some listings with dimensions seem to state slightly different numbers, and some also seem to mix up the sizing for holes 1/5 and 2/4 which doesnt help selection.
However some listings with dimensions seem to state slightly different numbers, and some also seem to mix up the sizing for holes 1/5 and 2/4 which doesnt help selection.
Thread Starter
9 Second Club
Joined: Nov 2003
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From: Norn Iron
Some are even stating dimensions for positions 2/4, which should clearly be positions 1/5
And many sites that sell bearings for these engines...do not even list CH25 as a fitment, including your own website.
When I'm looking to buy parts from half way around the world...it's nice to be sure you're getting what you want and is needed.
