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Faults, Fixes and DIY Please share your experience and knowledge with other members by contributing your own DIY, or by helping another member find the elusive fix!


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Old Sun, Nov-19-2017, 05:36:12 AM   #111
bimmerdriver
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Default Re: DIY: E46 M3 (S54) detailed valve adjustment

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Originally Posted by Kalahari View Post
Question - I have observed others, and was taught myself, to turn the motor by using a wrench on the camshafts rather than the front fan nut. See here, between cylinders 1 and 2, where the camshafts are not round:





I have not seen online anyone else do this... I am wondering if I was taught incorrectly or if this is an acceptable method, as it saves from having to remove any of the fan components.
I would not do this, nor would I advise anyone to do this. the timing chain and tensioners were designed for the load to be driven from the crankshaft, not the camshaft. maybe it's not a big deal, but I would just stick with that, since you also have to align to TDC using the damper anyway.
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Old Sat, Dec-02-2017, 11:35:25 PM   #112
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Default Re: DIY: E46 M3 (S54) detailed valve adjustment

Two part question: would it be optimal to reset the ecu so it could adjust the vanos and timing to the new clearances? If so, how could I do that? Currently researching but any tips would be appreciated!
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Old Sun, Dec-03-2017, 01:39:34 AM   #113
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Default Re: DIY: E46 M3 (S54) detailed valve adjustment

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Originally Posted by M3_Pilot View Post
Two part question: would it be optimal to reset the ecu so it could adjust the vanos and timing to the new clearances? If so, how could I do that? Currently researching but any tips would be appreciated!
That's an interesting one. I've never come across a reset required since it operates within a certain tolerance of shim thickness and few thousands of an inch shim thickness change probably won't make a diff.

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Old Sun, Dec-03-2017, 01:45:39 AM   #114
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Default Re: DIY: E46 M3 (S54) detailed valve adjustment

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Originally Posted by mrgizmo04 View Post
That's an interesting one. I've never come across a reset required since it operates within a certain tolerance of shim thickness and few thousands of an inch shim thickness change probably won't make a diff.

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Yes, I see what you're saying. But that difference is also enough for us to have to make an adjustment. I suppose the ecu is also constantly adapting so it would adjust accordingly if necessary.
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Old Sun, Dec-03-2017, 11:22:03 AM   #115
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Default Re: DIY: E46 M3 (S54) detailed valve adjustment

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Originally Posted by M3_Pilot View Post
Yes, I see what you're saying. But that difference is also enough for us to have to make an adjustment. I suppose the ecu is also constantly adapting so it would adjust accordingly if necessary.


I don't see how the shims (within tolerance) have any effect on timing. The engine certainly doesn't know since it gets all of its information off the camshaft sensors which should not be impacted at all by valve clearance.
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Old Tue, Dec-05-2017, 03:27:10 AM   #116
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Default Re: DIY: E46 M3 (S54) detailed valve adjustment

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I don't see how the shims (within tolerance) have any effect on timing. The engine certainly doesn't know since it gets all of its information off the camshaft sensors which should not be impacted at all by valve clearance.
Yeah that makes sense. Thanks for clarifying.
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Discussing DIY: E46 M3 (S54) detailed valve adjustment in the Faults, Fixes and DIY Forum - Please share your experience and knowledge with other members by contributing your own DIY, or by helping another member find the elusive fix! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)