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09-19-2015, 03:08 PM | #23 |
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I was in shock how powerful the engine felt after the new VANOS was installed.
Before the repair, I felt power at intial take-off and at top-end and mid-range was sort-of flat. Now the engine pulls strong from take-off to top-end. It's a joy to drive again. Apparently the VANOS was not working properly for a long time maybe before the warning light was going on and off. I still do not understand why the warning light would come on and off regularly. I was told the problem with the VANOS-UNIT was that one of the pistons inside the unit was occasionally sticking. I don't remember it running this good when I bought ot at 22,000 miles... so there may have been some wrong with the VANOS-UNIT when I first bought it. I had a Z3 M Coupe with a S54 engine years ago and can't remember how it felt... but because I replaced the factory 3.15 diff with a 3.75 diff, it's power delivery felt much different than my current Z4 M Coupe. Bottom line... I'm happy with how the engine is responding now.... |
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09-21-2015, 03:30 PM | #24 |
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From your experience, do you think periodic cleaning of the Vanos solenoid valves (as in this Beisan DIY) would make sense? http://www.beisansystems.com/procedu..._procedure.htm
It looks like it would be an hour or less to do and relatively risk free. I've been having a new Vanos filter and sealing plate installed whenever I have the valves done, but nothing else. Thoughts on this? |
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09-26-2015, 12:14 AM | #25 |
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