The other problem is that I know on some models the IP can only be installed one way or 180 degrees from that (there is only one notch) so if you are off by some odd amount you may need to find a way to slacken the chain enough to turn the IP driver so it is re-sync'd. You may not be able to simply re-set the pump and re-install it...again, others more knowledgable will chime in I am sure.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz