CSL Cam Profiles

[jupe777]

Having my top end rebuilt and I took the opportunity to take the new inlet camshaft and the old one into work and have my inspection department measure the cam profiles. I then converted to a CAD drawing so I can measure the wear. But I now have the exact profile of a new inlet cam. I presume the outlet is the same but mirror image. I will do the same on the outlet when it arrives to be sure.

This info could become useful if the supply of new cams ever dries up completely and we have to re-profile. If any member would a like the profile in .dxf format drop me a pm.

[0-60motorsports]

Very cool. Thanks for posting this up.

[NZ_M3]

Super for doing this for the community :thumbs:

PM coming your way.

[jupe777]

Super for doing this for the community :thumbs:

PM coming your way.

Thanks, email sent :smt023

[terra]

Wow this is awesome, thanks! According to BMW the exhaust cam on the CSL is a little bit shorter on duration for whatever it's worth

Sending you a PM

[jupe777]

Wow this is awesome, thanks! According to BMW the exhaust cam on the CSL is a little bit shorter on duration for whatever it's worth

Sending you a PM

I measured the used exhaust profile and yes your right, there's 1mm difference.

My work email was down yesterday so no emails left my outbox, I will send from home over the weekend.

Cheers chaps

[pinkpanther008]

CAM

Got the Cam profile scans, great thanks for the CSLR community support, much appreciated:beer:

I measured the used exhaust profile and yes your right, there's 1mm difference.

My work email was down yesterday so no emails left my outbox, I will send from home over the weekend.

Cheers chaps

[terra]

Hi Jupe777

I was taking a closer look at the drawing, and it looks like the profile fits that of an exhaust cam rather than an intake cam.

Take a look at the RealOEM picture (which does match reality in this case, at least for non-CSLs)



Based on where the concave section is, your intake cam profile looks more like an exhaust cam to me

Edit: Never mind, I see you had the cam oriented differently

Here's a quick comparison to the stock S54 intake cam (Apparently 260º compared to the CSL's 268º). The ramp is clearly steeper

[NZ_M3]

Questions ... what are the number markings on these cams to identify it as CSL?? It seems to me that they have identical markings/numbers to stock M3 cams correct??

[GregorFuk]

So armed with this info does this me the CSL community can have it's own cams ground up from the likes of catcams etc?

[Mike RT4]

Schrick already does CSL cam profiles, as it is a common upgrade for normal M3 owners . However, BMW won't fit non-genuine cams (as I am finding out to my cost, as I have been without the car since the end of July, due to BMW GMbH having rejected two batches of replacement cams from their supplier so far, and they won't supply / fit anything else (and mine suffering the usual CSL cam wear issues)).

[alexk]

Mike is your car being repaired because of the cam issue ?

[Mike RT4]

Mike is your car being repaired because of the cam issue ?

Yes, it's under the BMW Mondial warranty scheme.

It's been sitting at the dealership since July this year (all stripped down waiting for parts), first waiting for head bolts (as BMW GMbH were showing the cams in stock) and then when the release date for the headbolts came (6 September), BMW GMbh informed Sycamores (the UK BMW dealer doing the warranty work) that all the inlet cams in that batch had failed to pass their quality control procedures and had been rejected (I have not been informed on what basis they were rejected). I was then advised that another batch of three were due in shortly, these arrived at BMW GMbH a few weeks ago, but were also subsequently rejected . So I am now waiting for a third batch and hope that these are okay, but have had no date advised for their release to BMW GMbH yet (and no guarantee that they will even pass the inspection)......

The wear issue is a common problem with them and BMW are obviously trying to prevent a re-occurrence by carrying out more stringent quality checks, but I just want my car back .

[alexk]

Very sorry to hear this Mike. I hope your car is fixed soon.

I don't have such problems because there is no warranty option here and you just bite the bullet and pay on your own :smt118

Back to the subject.
Are the cams wearing out because of lubrication issues ?
The same problem exists in the M3 E30 and the S14 engine.
Usually happens when the oil from the the cylinder head is not optimal (there is an o-ring or something that creates the problem - I don't remember the detail of this).

[NZ_M3]

The cams are x rayed before being released.

Strange you are waiting on inlet cams because I just picked mine up this week and was told the three exhaust cams they had in stock failed x ray tests.

Can someone please confirm the markings on the csl cams?? I have a feeling the markings on them are identical in every respect to the stock M3 cams???