Re: Drain plug removal

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Posted by Tim Daley(MI) on December 20, 2017 at 07:18:26 [URL] [DELETE] :

In Reply to: Drain plug removal posted by Tony on December 17, 2017 at 21:21:46:

The hex size AF (Across Flats) on the oil drain plug is 1-1/16”. It is best to use a good 6-point 1-1/16” socket (a 12-point will do if no 6 available) on a breaker/cheater bar. If it is stubborn then add a length of steel pipe for more torque. If hex is rounded off, chances are someone else has had the problem of not getting it removed. Rounded corners usually happen from open end wrenches that are worn and slip. Worse yet, if someone has used channel locks, pliers, or vise grips to try and remove it, those will also slip and round off the corners. It is likely when the last time the plug was installed, the person failed to put a new gasket on. When doing an oil change and draining the oil, always be certain the pan surface and the plug mating surface are free of any old gasket material. Then, install the new gasket on the drain plug, take a can of clean, fresh oil and apply a good coating on the gasket surface before installing. Do not overtighten, check for leaks after. When installing, don’t reef down the plug with your breaker bar and pipe, just use a standard socket wrench using normal hand torque. For really stubborn, rounded off plug hexes, you may have to spray some PB BLASTER around the plug surface and let set for a spell. Tapping with a punch and hammer may assist in loosening the seal too. If plug hex is severely rounded off, get a new one, p/n 9N-6730. The drain plug has a fine mesh screen attached as the oil pump intake is right there when plug installed. Sometimes guys remove the screen when they have poor oil pressure thinking it will help, and really does nothing but eliminate filtering of larger debris in the oil. The screen is there for a reason –make sure the plug has one.

Tim Daley(MI)

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