Oil Pan1986-1992 Small Block Chevy1-Piece Rear Main SealRight-Hand Dipstick4-Quart Notes:Four-quart pan used on ZZ4 crate engines and 1986-92 Camaro/FirebirdInternal baffling and right-hand dipstickDesigned for 1-piece rear main and 1-piece oil pan gasketFits with crankshaft seal adapter - 809-10051118Use with oil pan rail reinforcement - 809-12553058(LH) and809-12553059(RH).Production Chevrolet small-block V8 and V6/90-degree engines were redesigned in 1986 with a leak-resistant one-piece rear seal. This change required a revised oil pan design to fit a new rear seal retainer which is bolted to the back of the engine block. A new one-piece oil pan gasket replaced the four-piece gasket set used on pre-1986 engines.As a result of these changes, oil pans and gaskets are not interchangeable between 1955-85 and 1986-up engines. If you have installed crankshaft seal adapter on a block which is machined for a one-piece rear seal, you must use an oil pan and gasket designed for 1986 and newer engines.
