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Old 06-11-2012, 04:42 PM
Steve530 Steve530 is offline
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Location: Knoxville, TN
Join Date: Dec 2007
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Mein Auto: 2001 530i
I don't think the large loop affected your readings. But to be sure, you might want to check the vacuum again with the bottom of the manometer formed into a U. Or you could add more water so that the lowest level does not drop to the place where the loop. Also, I think the manometer should be plumb so that the distance you measure is the actual difference in heights of the water columns.

The CCV regulating valve controls the intake manifold vacuum applied to the crankcase, so a higher than normal vacuum in the crankcase would mean that the regulating valve is allowing too much vacuum to be applied to the crankcase. That might be caused by a diaphragm that is not closing off the vacuum port to the intake manifold hoses.
2001 530i/5 S+P CDV delete/Akebono ceramic pads
M5 SSK/RedLine MTL/M5 rear sway bar/Bilstein HD

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