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10-29-2010, 09:50 AM | #45 |
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Hey, O-cha
On the Z4, you said it would be a harder job because of clearance, can it be done though with out lifting the motor? My hunch is yes - if so, what is the critical step, if there is one, to doing it within the confined space?
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10-29-2010, 09:58 AM | #46 | |
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It is VERY close though and I'm not sure if it can actually be done when I took a second look. It boils down to with the vanos unit out as far as it can go, will you have access to the nuts of the threaded shaft and be able to move the cam to the right position (they don't move very freely)
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10-29-2010, 10:13 AM | #47 | |
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And then what is it that makes rotating the cams difficult - just the tension or friction present with the thing still as compared to when it's running? That must be why the VANOS unit has such high pressures in it... As much as I'd like to try something like this on my own, I'm still being realistic and am not sure I'd get it dead on correct. I'm up for a challenge, and I'm always trying to learn new things mechanically to increase my skill and this sort of job is about where I am with technically challenging work. I think I fully understand the issues and what special tools are needed (or unnecessary) and I'm pretty meticulous about things. But still, uncertain.....
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10-29-2010, 11:29 AM | #48 | |
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The tools you would need are like $800 FYI.
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03-09-2012, 11:33 AM | #49 |
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I concur with what O-cha said. Z4M has a crossbar in front of the engine which makes VANOS removal impossible without the expensive special tools. You'd need BMW special tools to get the VANOS "pistons" to retract for removal and extend for installation. I spent $900 on those tools because I track my car and want to be able to check my exhaust hub and cam bolts when I do valve adjustment.
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04-30-2014, 09:49 PM | #50 | |
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