That is strange. I wonder if it'd be different if they were schrick variant.
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288/280 vs 280/272 cams.
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Originally posted by Obioban View Post
We will see (I asked him in the comments), but I be the actual issue was he didn't move the oil valve over from the stock cams when he installed the cat cams (cat cams, unlike schricks, don't come with it). 800 miles to failure implies a lack of lubrication, to me.
I'm not convinced it was used followers that caused this, but those valves shouldn't be the issue.
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there are a lot of different numbers out there. the torque spec pdf file here says 288/280 and these guys here don't know it too? http://www.cslregister.com/forum/showthread.php?t=8872
i also found in a german forum that they are 288/280 but i will take tomorrow some pictures and maybe someone can compare them to schricks 288/280.Last edited by Zekarus; 06-02-2020, 03:07 PM.2003 AW/BLK 6MT - Instagram
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Originally posted by Zekarus View Postthere are a lot of different numbers out there. the torque spec pdf file here says 288/280 and these guys here don't know it too? http://www.cslregister.com/forum/showthread.php?t=8872Attached Files
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Do the CSL camshafts come with the valves?
I’m curious how many of you that have Cat cams installed have the valves installed? Are they an absolutely necessary? Most 05-06 M3’s don’t have the valves on the stock cams so why would they need to be installed with aftermarket cams if they weren’t originally installed?
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Originally posted by racinghart View PostDo the CSL camshafts come with the valves?
I’m curious how many of you that have Cat cams installed have the valves installed? Are they an absolutely necessary? Most 05-06 M3’s don’t have the valves on the stock cams so why would they need to be installed with aftermarket cams if they weren’t originally installed?
If your cams are machined for the valves, but have no valves installed, then oil will flow freely from the vanos to the cam interior and result in pressure loss
If your cams have the valves, oil will not flow through the cam interior until pressure reaches 4.5 bar (65 psi)
If your cams are not machined for the valves at all, then oil won't flow through the cam at all, and pressure will be maintained, even above 65 psi.
Presumably on later builds, BMW decided that the car is above 65 psi rarely enough that it doesn't actually matter and they may as well just block any oil from flowing through the cam.
That said, my 05's factory cams had the valve.
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its not clear if it just spat a shim causing the wear or it spat the shim because it wore out. Would need to inspect the other lobes closely to if signs of abnormal wear . Nevertheless its more risky to not replace the followers and you probably have no chance for warranty claim from Schrick or catcams
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Originally posted by Zekarus View Postcsl has 288/280 cams and uses the same stock followers as every S54 engine. i'm also wondering why schrick recommends their dlc coated followers for their 288/280 cams.
My thoughts
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Originally posted by Obioban View Post
We will see (I asked him in the comments), but I be the actual issue was he didn't move the oil valve over from the stock cams when he installed the cat cams (cat cams, unlike schricks, don't come with it). 800 miles to failure implies a lack of lubrication, to me.'05 M3 Convertible 6MT, CB/Cinnamon, CSL Airbox&Flap, PCSTuning, Beisan, Schrick 288/280, SS V1's & 2.5" System, RE Stg 1&SMF, KW V2, CB PS, Apex EC-7R
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Originally posted by terra View Post
The job of the valves are to keep vanos lubrication pressure up.
If your cams are machined for the valves, but have no valves installed, then oil will flow freely from the vanos to the cam interior and result in pressure loss
If your cams have the valves, oil will not flow through the cam interior until pressure reaches 4.5 bar (65 psi)
If your cams are not machined for the valves at all, then oil won't flow through the cam at all, and pressure will be maintained, even above 65 psi.
Presumably on later builds, BMW decided that the car is above 65 psi rarely enough that it doesn't actually matter and they may as well just block any oil from flowing through the cam.
That said, my 05's factory cams had the valve.
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So whats the general verdict of Cat Cams vs Schicks?2004 Silbergrau Metallic 6MT
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RACP Plates/Vincebar/CMP/Turner RTAB/Beisan
2006 M6 Black Saphire SMG
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