Join Date: Jun 2006
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Good point with the O-ring "left behind". It's a stupid thing but is easy to miss: the old filter's ring stays in the groove and the new filter doesn't screw on tightly. It'll work until the oil is pressurized, then....splat!
Get into the habit of running a pinky finger in that groove to confirm it's empty, or just eyeball the old filter. A smear of lithium/white grease on the new O-ring helps to make the seal, and I usually tighten it a quarter-turn past "hand" tight with a filter wrench. Lastly, you could take a wrap of oil-proof thread tape if there's not too much damage.