Having owned and serviced Nine subaru over 35 years, They usually wont leak but the tightening torque goes up a bit, and the removal torque can become excessive. With the crush, you can tighten the plug until the washer stops crushing. Makes for an easy removal.
My wife's Subaru servicing dealer writer was scolding me, saying the DP was "loose" when we were in there with a new 2021 outback for rear axle noise and an OC. I said it wasn't leaking - so it wasnt "loose". Then I dropped the BOMB telling them last OC was performed at a selling dealer Subaru service center. Got no more snide remarks from the peanut gallery. Don't mess with the NIASE Master !
may recall this being posted by AlleyCat at subaruforester.org over a decade ago.
Subaru engineering and bean counter mistake. small 14MM head with a large plug. China sourced pan and plug, VERY mild steel.
Removal trial with Craftsman 6 point box combo wrench - and a hammer, LOL. Sadly, vice-grips required next.
Dealer refused to replace this garbage bolt under warranty. Schmoes.
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