Do the intake and exhaust sprockets align exactly in the middle? When I reinstalled my vanos, my slots were centered on the intake sprocket, but my exhaust slots were not as centered. I did use the cam blocks. Any particular reason why this is critical? The below quote is from pelicanparts vanos timing instructions:
The intake sprocket is installed with the flat side facing you (the Vanos unit). The collar of the intake sprocket faces and points to the camshaft. Align the two sprockets and the chain so that the slots are centered on both sprockets (see arrows).
The intake sprocket is installed with the flat side facing you (the Vanos unit). The collar of the intake sprocket faces and points to the camshaft. Align the two sprockets and the chain so that the slots are centered on both sprockets (see arrows).

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