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Normal spun bearings or just housing wear is typically in the opposite direction but mine is going in the direction of the block essentially to the back, its a little wear but i have never seen something like this before, just picked up the block sunday and its in great condition but since i have never seen this type of wear and couldnt find any information from anybody else on it and wonder if its fixable and i assume it is, also want to know what its from. getting my block honed and cleaned up aswell as my heads and is this something they could fix. https://drive.google.com/file/d/1N3i...usp=share_link https://drive.google.com/file/d/1JNy...usp=share_link
Looks to me like a normal block that has had the cam bearings removed normally, and now needs a new set normally installed. Or am I missing something?
Just see some wear at the bottom of the cam housing pointing to the back of the block, at first i thought it was something from factory but i just wanted to ask someone and get their opinion, after looking at it there is a texture difference but it isnt deep maybe a thou deeper, if you dont see anything wrong with it than i guess im good, thank you man
Those marks are nothing unusual. Remember that the aluminum is very soft, and easily gets marked up when bearings are pressed in and out. You probably don’t even want to look at the top of the cam bore, as it gets scratched up pretty good by this:
Although I see no problems here, it should be noted that oversized cam bearings ARE available should the bores become truly damaged.
That line is either from some one hammering them out with a drift or from the parting line on the bearings it self. As long as they measure on size there shouldn't be an issue. The radial marks are from the machining process. Each housing bore has a specific bore size and bearings to match.
Durabond CH-10 Fits LS engines with, 1st Design; 99-03 Positions 1 and 5 Housing Bore 2.3260 Inch /2.3280 Inch, Cam Bearings
Durabond CH-23 for the 2nd design were discontinued and replaced by the CH-25. which are the same .O.D. but wider.
Fits LS engines with 2nd Design Positions 1 and 5 Housing Bore of 2.3460" /2.3480".
Fits LS engines with .775" Wide Bearings in All Positions.
Here is the pictures of the bore he is questioning.
That line is either from some one hammering them out with a drift or from the parting line on the bearings it self.
That line is indeed from the parting line on the bearing. One say you can tell is that it doesn’t go across the entire width of the bore - it only goes in the direction the bearing came out. You will see that on virtually any aluminum LS block from which the cam bearings have been removed.
Last edited by StorminMatt; 05-15-2023 at 08:17 PM.
Those marks are nothing unusual. Remember that the aluminum is very soft, and easily gets marked up when bearings are pressed in and out. You probably don’t even want to look at the top of the cam bore, as it gets scratched up pretty good by this:
Although I see no problems here, it should be noted that oversized cam bearings ARE available should the bores become truly damaged.
When it comes to aluminum blocks, I've been told by a couple of other engine builders that they prefer using blocks that have had the fewest cam bearing changes. They claimed that after 5 or more cam bearing changes, the aluminum bores wear a slight amount, increasing likelihood of the cam bearings walking. FWIW......
When it comes to aluminum blocks, I've been told by a couple of other engine builders that they prefer using blocks that have had the fewest cam bearing changes. They claimed that after 5 or more cam bearing changes, the aluminum bores wear a slight amount, increasing likelihood of the cam bearings walking. FWIW......
I agree here. In fact, with my aluminum builds, unless the cam bearings are absolutely way out of spec…I’m talking gone/trashed….I leave them alone. You will never, ever get another set of bearings to fit as well as the OEM cam bearings in an aluminum block. I don’t care what they look like myself. If they are in spec…and I’ve seen copper showing on the front bearing before, and still be in spec (albeit was just a hint of copper)…I’ll not change them. Cam bearings in these LS engines are pretty resilient actually, with OEM valvesprings in place.
05-10-2023, 07:00 PM
Cam housing wear? 
