Got a massive water leak and trying to get to the o ring by the oil filter. Can’t get the lower 6mm bolt and now it feels like it’s getting slightly rounded. Is there any trick to get a tool square on the bolt? I think I might have to Dremel tool the whole bracket off.

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1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero