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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Nov-11-2019, 09:17:29 PM   #11
Fresh1179
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack

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Originally Posted by Whitehawk8 View Post
Holy mother of high quality. Those photos dont even come close to fitting on my 13 inch laptop screen.

Can you still not fit both sprockets?

perhaps there's a portion of chain dangling underneath the crank?


Let me check real quick. I don’t think so. I’ve pulled and rattled pretty well by now. One moment.
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Old Mon, Nov-11-2019, 09:46:11 PM   #12
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Default VANOS Rebuild Help—Not Enough Timing Chain Slack

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Originally Posted by Fresh1179 View Post
Let me check real quick. I don’t think so. I’ve pulled and rattled pretty well by now. One moment.




Here are some more for you. With endoscope so they are pretty terrible quality. There appears to be some chain leading into the oilpan? Bottom is right side of crank. Is that red thing normal or am I seeing something....

Edit. Even if that portion of chain below the sprocket is not supposed to be there how the hell do I dislodge it.
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Last edited by Fresh1179; Mon, Nov-11-2019 at 09:51:00 PM.
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Old Mon, Nov-11-2019, 10:03:18 PM   #13
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack



Hmm. Should it be laying across the TOP of the crank like that? Doesn’t make sense in the REAL OEM photos but I don’t know.
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Old Mon, Nov-11-2019, 10:10:39 PM   #14
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack



I don’t see why it would be sitting on top but I have been wrong many many times before.
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Old Mon, Nov-11-2019, 11:41:05 PM   #15
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack

So it’s not sitting on top. Sides are in grooves. Cannot see any loose chain underneath. This is the tightness WITHOUT the upper chain guide or chain tensioner installed. Tried many times like this. No dice. I cannot see directly under the crank but I don’t see anything dropping in the reflections. I’m baffled.
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Old Tue, Nov-12-2019, 12:01:05 AM   #16
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack

I don’t know. Maybe I’ll try again but it’s been about this way and it’s just impossible to get it on with upper chain guide.
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Old Tue, Nov-12-2019, 12:19:54 AM   #17
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack

I usually fit the sprockets inside the chain and then slide them onto cams. Did you try it that way? You will not be able to put the sprockets on first and slide the chain on afterwards.


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Old Tue, Nov-12-2019, 12:55:27 AM   #18
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack

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I usually fit the sprockets inside the chain and then slide them onto cams. Did you try it that way? You will not be able to put the sprockets on first and slide the chain on afterwards.


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I finally got it. A rogue chain link was snagged underneath cam. Used endoscope and coat hanger to dislodge it. My hands are bloodied and I spent 10 hours on one step but I’m alive. Thanks for the tips man. Sometimes you just need that moral support to keep going. Probably saved me 1000. But my chain tensioner broke so this continues to go well.
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Old Tue, Nov-12-2019, 12:58:30 AM   #19
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Default Re: VANOS Rebuild Help—Not Enough Timing Chain Slack

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Originally Posted by Fresh1179 View Post
I finally got it. A rogue chain link was snagged underneath cam. Used endoscope and coat hanger to dislodge it. My hands are bloodied and I spent 10 hours on one step but I’m alive. Thanks for the tips man. Sometimes you just need that moral support to keep going. Probably saved me 1000. But my chain tensioner broke so this continues to go well.



Lol. Glad you got it figured out though.
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Discussing VANOS Rebuild Help—Not Enough Timing Chain Slack in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)