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#51
10-10-2010, 06:03 PM
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 http://lmgtfy.com/?q=BMW+VANOS VANOS - Wikipedia, the free encyclopedia
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 650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex 600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's 135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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#53
10-12-2010, 01:06 AM
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Quote:
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#54
10-12-2010, 01:47 AM
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what kind of fuel are you using?
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#55
10-12-2010, 02:20 PM
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What does fuel have to do with valve train noise? This isn't an engine knocking issue via gasoline. Besides, we should ALL be using a good quality 91+ octane regardless.
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650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex 600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's 135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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#56
10-12-2010, 03:41 PM
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Misread the thread title sorry. I don't know why I associated the word knocking to shaking. Guess it really has been a long week (and its only Tuesday). Had a shake/vibrate on start up because I was a fool and used 89 for a little bit.
Anyways, this is not even the topic at hand. Basically no one pay attention to anything I'm saying in this thread lol.
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#57
10-12-2010, 03:53 PM
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It'll run on 89, but it'll back off the timing to compensate for the lower octane gas mileage, basically offsetting any savings in gas by producing less HP and lower gas mileage at the same time. My engine in the 7 is a little different, but it HATED it when I accidently filled a whole tank of 87..bucked, stuttered, etc.
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650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex 600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's 135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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#58
10-12-2010, 05:59 PM
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James,
There was a letter in Roundel where a reader suggests one way to help maintain your Vanos system is to replace the failure prone Vanos gear bolts. He says that these bolts tend to come loose from the cam gear and eventually sheer off resulting in the destruction of the timing chain, valve cover, cam gears, etc. Thus, the complete Vanos overhaul. He suggests that to prevent this, you simply need to replace the 12 cheap bolts before failure. He goes on to say that a friend with an e46 M3 had the Vanos rattle and when they inspected it, 5 of 6 bolts on the intake side were already sheered off and the 6th was loose. What do you think about that?
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Profeshenal spellar
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#59
10-12-2010, 06:11 PM
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A pretty much massive failure like that happened to a customer of mines 99 740iL to the point where we rebuilt the engine with the help of his son. It was a headache while the engine was still inside the engine bay to say the least, but he wanted to do it at his home.
The bolts may be cheap, but it's sometimes getting to them that can be the issue. I have a pair of wrenches welded together to hold the cams gears in place to make sure to not screw up their timing during disassembly. Here's a couple quick links for those who like stimulation via car porn...take it off baby!  So... My car has loose VANOS bolts.... (pics) - BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3) DIY: Fix your lose VANOS bolts! LOTS O' PICS! - BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3) YouTube - BMW E46 M3 VANOS bolt failure #1 YouTube - BMW E46 M3 Vanos bolt failure #2 ...and you said "who cares" about a few VANOS issues
__________________
650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex 600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's 135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
Last edited by m5james; 10-12-2010 at 06:17 PM.
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#60
10-12-2010, 06:56 PM
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Well, it sounds like a few bolts cause the most issues, so replace them once with the updated bolts and all is good, right?
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Profeshenal spellar Last edited by FSETH; 10-12-2010 at 07:39 PM.
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