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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, Jun-10-2019, 06:12:24 PM   #1
sapote
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Default VANOS disk new holes and upper guide works

I had my original VANOS disk drilled with smaller holes. New smaller holes with D=0.384, centered on circle R=0.797. The driving tabs width = 0.380, therefore the new smaller holes mated to tabs with 0.004 clearance. Original holes D=0.419 with clearance = 0.039, or about 10X larger. At 72K miles the disk holes and tabs looked perfect. I also removed both cam sleeves bolts, cleaned and added medium Loctite torqued to 9 ft-lbs.

Also replaced the worn upper chain guide with Beisan solid guide. The old guide top surface worn only 0.002 by the moving chain, but the lower surface worn 0.100 by rubbing with the lower guide. I believe one of the reason for this significant wear is lack of oil lubricant in this intimate mating surfaces between the two guides. Once lapped down together the surfaces have no gap for oil. I think by drilling two small holes and chamfered (marked red circles) through this surface would provide oil for these surfaces which are dried otherwise under the tensioner force. The stock unit is hollow and so the drilled holes might not carry the oil effectively, but the solid Beisan should be more effective with the drilled oil holes. To remove the guide long bolt #7, the metal coolant pipe mounting bracket 10mm bolt needs to be remove and pushed out a little (Beisan procedure omitted this) . I found the bolt original gasket was aluminum O-ring but the RealOEM listed as copper as shown in this link. Can someone confirm this?
https://www.realoem.com/bmw/enUS/sho...diagId=11_2992
Attached Images
File Type: jpg VANOS-holes.jpg (742.0 KB, 73 views)
File Type: jpg upper-guide1.jpg (466.0 KB, 68 views)
File Type: png upper-guide-mod.PNG (470.5 KB, 71 views)
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Old Mon, Jun-10-2019, 11:51:32 PM   #2
mrgizmo04
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Default Re: VANOS disk new holes and upper guide works

I think I remember mine being copper

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'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: VANOS, WPC rod bearings, full SS (SS stepped V1 headers, catted S1, stock S2, SS sport), AFD E85 Proflex kit, Ohlins R&T/Hyperco 375f Swift 672r/GC street tops and camber plates, ST40 355 pfc08, 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, Sachs clutch/flywheel, rear main, Beyer driveshaft, valve adjustment, cooling refresh.

Happy to help with VANOS or any other DIY job around NorCal. Have various specialty tools (VANOS, RTAB, engine bar, valve adjustment, tranny jack, ball joint separator, pilot bearing puller, tap&die kit, etc).
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Old Tue, Jun-11-2019, 02:06:45 AM   #3
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Default Re: VANOS disk new holes and upper guide works

The ones I took off were copper, so were the replacements
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Old Thu, Jun-13-2019, 11:08:15 PM   #4
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Default Re: VANOS disk new holes and upper guide works

Everything installed but I removed the new Beisan guide for mod and the guide bolt aluminum washer to confirm it's aluminum, and it is as shown in pix.

I will drill the oil holes for the chain guide today.

Btw, I couldn't find my 32mm 1/2 socket for the chain tensioner in the set, but I had one in the massive 3/4 socket set. I was surprised that the huge ratchet and socket fitted even with the radiator lower hose connected.
Attached Images
File Type: jpg guide-seal1.jpg (528.9 KB, 14 views)
File Type: jpg guide-seal2.jpg (326.6 KB, 16 views)

Last edited by sapote; Thu, Jun-13-2019 at 11:26:48 PM.
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Old Fri, Jun-14-2019, 02:28:24 AM   #5
sapote
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Default Re: VANOS disk new holes and upper guide works

Drilled oil holes on the guide at 45* angle to help oil flow:
Attached Images
File Type: jpg drill1.jpg (387.0 KB, 25 views)
File Type: jpg drill2.jpg (692.8 KB, 29 views)
File Type: jpg drilled3.jpg (589.3 KB, 20 views)
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Discussing VANOS disk new holes and upper guide works 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)