Big Block Oiling System

FE SERIES Ford’s “FE” series big-blocks went through the most extensive oiling system changes of any Ford engine ever made. Most evident was the 427, which underwent significant changes throughout its service life, leading to the “Side Oiler” design of 1965. The 332/352/360/361/390/406/410/ 428 didn’t change much except for the distinct differences between mechanical lifter and hydraulic lifter blocks. Hydraulic lifter blocks have twin oil galleries drilled the length of the block to supply the lifters. Mechanical lifter blocks have the bosses at each end of the block, but without the oil galleries. The “FE” oiling system is simple in scope, with a sump-positioned oil pump and pickup centered at the front of the pan. The oil pump is driven by the camshaft via a driveshaft tied into the distributor shaft.

The “FE” oiling system took on a distinct change in the 427. The 427 block came two ways— Top Oiler and Side Oiler. Most 427s were Top Oilers. Beginning in 1965, Ford’s concern over oil starvation at the main and rod bearings led engineers to the conception of a whole new 427 block casting called the “Side Oiler.” The Side Oiler had an additional oil gallery that ran down the left-hand side of the block, feeding bountiful amounts of oil to the main and rod bearings.

All "FE" engines have a cast aluminum oil filter mount bolted to the side of the block as shown on this 428 Cobra Jet. The oil pressure sending switch or sending unit mounts on top. This is an oil pressure sender for a gauge, which is larger than an oil pressure light switch.

Oiling system modifications for the “FE” are traditional hot rod steps. Chamfering the crankshaft journal oil holes improves oil flow. Using a high volume oil pump increases flow. High pressure isn’t always the answer. If you are maintaining 10 pounds of oil pressure for every 1,000rpm, your engine should remain healthy. If you expect 7,500 rpms, then ensure your oiling system will maintain 80 psi at high revs.

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