I am currently replacing the rear VTEC Solenoid (Spool Valve) Gasket on my 1991 NSX and I am having a real issue with removing 2 of the 3 - 10mm bolts, it feels like a impact wrench was used to tighten? Does anyone have any suggestions with tools or techniques I should use? I would use my big impact wrench but it way to big to fit down there?