Thread: Mann Filter...5th O-Ring?
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Old Feb 12, 2009 | 09:39 AM
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onehundred80
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Default Re: Mann Filter..5th O-Ring?
Originally Posted by Chris L.
Does anyone know for sure if the 5th O-ring in the Mann oil filter kit is intended to replace the crush washer on the drain bolt?
O-rings are not to be used as replacements of crush washers. O-rings sit in a groove of a specific size to suit its application to limit the amount of compression of the O-ring.
Crush washers, usually copper, should be replaced every time they are moved after the initial torquing as they will never fit as well as they did originally. You most probably will get away with it but even a slight sign of oil around the drain plug means it is leaking. The leak may take some time to be evident, the first sign may be a spot of oil on your driveway days or weeks later.
Clean the plug and washer and install using the correct amount of torque (22 ft. lbs.) replace the plug if the thread or hex head are damaged.
 
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