Servicing a 92 Oldsmobile 88. Don't want to reuse the reusable 25 year old gasket, it has a few cracks after I removed it. Would rather use RTV which is superior in sealing plus only $5 vs. $30 for the gasket. Any issue doing that? Only concern is the gasket is maybe 1/8 inch thick while the RTV will essentially have no thickness.