Ford 335 Engine - Overview

Overview

The 335 series, although sharing the same bore spacing and cylinder head bolt pattern, was very different internally from the somewhat similar-looking Windsor series. The 335 Cleveland used smaller 14mm spark plugs in one of two different cylinder heads, both with 2 valves per cylinder. The '4V' heads had larger ports and valves than the '2V'. Both had the valves canted to the sides in a "poly-angle". The '2V' head had an open, almost hemispherical-shaped combustion chamber while the '4V' sported a quench-type combustion chamber. The Cleveland has a square-shaped rocker cover while the Windsor has a more rounded cover. All 335 covers are secured with 8 bolts; the Windsor uses 6 bolts.

The radiator hose locations differ between the Windsor and Cleveland engines; the Windsor routed coolant through the intake manifold, with the hose protruding horizontally, while the Cleveland had a dry manifold with the radiator hose connecting vertically to the cylinder block above the cam timing chain cover.

The 335 uses large main-bearing caps, allowing 4-bolt attachment on some engines. The oiling sequence does not route the oil supply to the main bearings first, and some critics fault this. However, for all but the highest level of performance applications, it has not proven any less reliable than the Windsor line.