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Old 12-26-2011, 06:51 PM   #85
Steve30
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Join Date: May 2008
Location: Scarborough
Posts: 1,722
They have a revised nut for the pump which will probably never come loose especially with loctite. the problem seems to be a lot more common on the m52/s52 and m54 engines. S54 guys seem to do it just as a safety precaution. I wonder if the s54 is better balanced from the factory which reduces the vibrations that cause the nut to back off.
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