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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 Tue, Dec-17-2019, 07:26:40 PM   #111
Drewster
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Default Re: Seeking Help: VANOS Timing

Quote:
Originally Posted by terraphantm View Post
Yeah, but I feel like frequently heating up small somewhat slippery pieces of metal to red hot (i.e >500șC) is drastically increasing the chance of personal injury for minimal gain. I currently have no leaks, and I've never bothered annealing a washer.
That, and the time it takes to go heat a stupid washer easily outweighs just pulling a 0.10 cent copper washer out of a pack.

I too have a pack of copper washers from Amazon/ China
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Old Wed, Dec-18-2019, 02:46:45 AM   #112
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Default Re: Seeking Help: VANOS Timing

Two developments tonight:

1) I measured valve clearances before removing the cams, per sapote's helpful comment. For the 2 cylinders in which the cams were not on-lobe (ish), both the intake and exhaust were in spec, surprisingly. No intake valve (4 measured) was more than 0.009" and the exhausts (4 measured) were right at 0.012". Like I said, this was spot-checking 2 cylinders on each cam (they were the same 2 cylinders obviously) as I had already removed the hubs and did not want to spend time locking the cams to the sprockets which would have been required to spin the engine. The leakdown test of all cylinders will be the best test for me.

2) I compared the Cat cams to the stock cams by doing the following (w/ pics):
- the cam bridge pin is 6mm. Amazingly, I had a screw driver with a shaft that was exactly 6mm.
- The screwdriver afforded me the extra length to align both cams together.
- I put the intake signal disk on the Cat cam intake first. Took a picture of it laying flat on the table and noted location relative to flat surface of table (see next post)
- I put transferred the intake signal disk to the stock cam. Picture in same location (see next post)
- I repeated the procedure with both exhaust cams (see next post)
Attached Images
File Type: jpg IMG_4958.JPG (513.5 KB, 9 views)
File Type: jpg IMG_4959.JPG (518.3 KB, 9 views)
File Type: jpg IMG_4960.JPG (586.7 KB, 10 views)
File Type: jpg IMG_4961.JPG (603.7 KB, 11 views)
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Old Wed, Dec-18-2019, 02:52:11 AM   #113
terraphantm
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Default Re: Seeking Help: VANOS Timing

When held like that, does to tooth to align the timing wheel match up on both cams?
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Old Wed, Dec-18-2019, 02:54:53 AM   #114
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Default Re: Seeking Help: VANOS Timing

The reference photos of the signal disks in the following order:
Photo 1: Cat cam intake
Photo 2: Stock cam intake
Photo 3: Cat cam exhaust
Photo 4: Stock cam exhaust

What do folks think about the comparisons? To me, the intake cams do NOT match but the exhaust cams do match.

(I couldn't easily rotate the photos with the upload feature but doesn't really change the story)
Attached Images
File Type: jpg IMG_4962.JPG (545.4 KB, 19 views)
File Type: jpg IMG_4963.JPG (517.3 KB, 22 views)
File Type: jpg IMG_4964.JPG (513.9 KB, 11 views)
File Type: jpg IMG_4965.JPG (469.7 KB, 10 views)
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Old Wed, Dec-18-2019, 03:02:25 AM   #115
jbfrancis3
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Default Re: Seeking Help: VANOS Timing

Markings on the Cat cams if anyone is curious.
Attached Images
File Type: jpg IMG_4966.jpg (473.8 KB, 14 views)
File Type: jpg IMG_4967.jpg (487.3 KB, 9 views)
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Old Wed, Dec-18-2019, 03:06:40 AM   #116
terraphantm
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Default Re: Seeking Help: VANOS Timing

If the camera is flat each time, I agree the intake cams seem to be different. Hard to say for sure though.
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Old Wed, Dec-18-2019, 06:52:49 AM   #117
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Default Re: Seeking Help: VANOS Timing

For a good comparison, lay the sensor wheel on a flat block, and a vise to hold the pin screwdriver vertical (jaws opening line along the cam length), such that the cam is horizontal or near to. Pic of each wheel on the flat block reference will give a clear comparison without the need to set the camera flat.
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Old Wed, Dec-18-2019, 07:04:39 AM   #118
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Default Re: Seeking Help: VANOS Timing

In the pictures if both cams were slotted together with screwdriver then the code wheels referenced to the flat glass table surface should be enough. Are the code wheels photos posted Upside down? Definitely wheels are not at same position.

Ignore my suggestion using the vise if the above assumption is true.

Last edited by sapote; Wed, Dec-18-2019 at 07:13:00 AM.
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Old Wed, Dec-18-2019, 07:11:32 AM   #119
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Default Re: Seeking Help: VANOS Timing

From the pic, Cat cam code wheel will cause cam angle readings more retarded than it should be.
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Old Wed, Dec-18-2019, 07:16:45 AM   #120
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Default Re: Seeking Help: VANOS Timing

So, either wheel key or the bridge pin hole was wrongly indexed on the Cat cam. Strong evidence to ask manufacturer for compression.
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Discussing Seeking Help: VANOS Timing 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)