GM Big Block Oil Pan Gasket | Crusader RM0230 OEM one piece oil pan gasket seals between the oil pan and the block on Crusader 454 and 502 cu. in. marine engines from 1991 and newer. For Crusader 1991 & newer Gen V 7.4L 454 CID and 8.2L 502 CID marine engines Original Crusader Replaces Crusader 31138, 7090000 Replaces Mallory Ignition 9-61508 Replaces Mercury/Mercruiser 27-845628 Replaces Marine Power 0053-245F7 Replaces OMC/Johnson/Evinrude 3853510 Replaces Pleasurecraft Marine RM0230 Replaces Volvo Penta 3853510