Ford 302 1 PC. Teflon Main Seal

The FEL-PRO Ford 302 1 PC. Teflon Main Seal is a one-piece rear main seal engineered for Small Block Ford engines, combining rubber and steel construction to deliver reliable crankshaft sealing. This is the OEM-specification replacement seal for classic and contemporary 302 cubic-inch engines, addressing one of the most critical sealing points in any engine block where the crankshaft exits toward the transmission.

The one-piece design eliminates the traditional split-seal design, which is prone to leakage when engine oil pressure and vibration work against weak contact points. FEL-PRO's Teflon-enhanced formulation reduces friction at the seal lip while maintaining consistent contact pressure against the crankshaft journal. Steel backing provides structural support and ensures the seal maintains proper geometry under the thermal expansion cycles typical of high-performance and marine applications. Proper installation requires correct alignment with the crankshaft's rear journal surface—any deviation can compromise the seal integrity and lead to oil seepage into the transmission bell housing.

This seal is essential for owners rebuilding or resealing a 302 Small Block Ford engine, whether for hot rod restoration, marine propulsion, or vintage truck applications. It's commonly used in engine overhauls where oil leakage at the rear main has become problematic, and it's a standard specification component when replacing worn seals during transmission servicing. The FEL-PRO brand is recognized across the automotive aftermarket for OEM-level sealing solutions, making this seal a direct replacement for factory specifications and a preferred choice for precision engine work.