7.3 Dipstick Fix Kit
Description
The leak at the dipstick flange is a well known issue with the 7.3 Powerstroke motor. The leak develops because the factory O-ring mounted inside the adapter swells over time due to exposure to oil. As the seal swells it actually deforms the inner piece of the adapter causing the outer nut to loosen. Some people will try tightening the nut to stop the leak and that can work temporarily, but it only deforms the inner piece more.
The factory repair for this leak is to remove the pan and replace the whole unit from the inside of the pan. This is a time consuming and expensive repair.
DISCLAIMER - This only works with FACTORY or DORMAN internal dipstick flanges. Also if your dipstick nut has ever been over tightened and the threads pulled you could still wind up with a small leak.