Production continued at the Cleveland foundry while the Y-Block was installed in cars through 1962 and trucks through 1964. Y-Block production at the Dearborn foundry ended after the 1957 model year with the introduction of the new FE and MEL series of engines. From 1955 until the end of production in 1964, parts can be easily interchanged. These include the fuel pump, water pump, oil pump, distributor, cam bearings and camshaft. There are some parts specific to the 1954 EBU 239 engines. Flywheels and bell-housings are interchangeable along with timing covers and crankshaft dampers. Any year exhaust manifold will bolt to any year head. Regardless of the source, the external dimensions of all Ford Y-Blocks are the same. ECZ is cast into 312 main caps all others are If the engine is disassembled, check the casting number on the main cap. The 312 ECZ crankshaft has an aspirin-sized dot on the outer edge. The best way to identify a 312 externally is by checking the flywheel flange on the crankshaft. Although most 312s were ECZ5015 followed by A, B or C, these can also be a 292. Any casting number used on 312 blocks was also used on 292 blocks. Since 312s were machined from the same block casting as a 292, they are nearly impossible to identify externally. The Cleveland foundry cast the larger 292 and 312 blocks, and the casting number can be found above the oil filter. Cleveland Foundry parts have an F surrounded by a semicircle to identify their source. As stated, EBU is a 239 while ECG indicates a 272. A three-digit casting number will be found nearby, typically EBU or ECG. The letters DIF cast near the distributor identify parts cast at the Dearborn Industrial Foundry. Main bearing size was increased from 2.498" on the EBU and ECĬrankshafts to 2.625" for the ECZ 312 crankshaft. The same connecting rod bearing with 2.188" rod journal the The block crankshaft and connecting rods all have the ECZ The 312 had a 3.800" bore andģ.440" stroke with a shortened 6.254" connecting rod. Installed in all Mercury models, and as an option in 1956 T-BirdsĪnd some high-line Ford models. The 3.100"Ĭrankshaft is marked EBU, while the 3.300" crankshaft is With a 3.625" bore and 3.300" stroke for the 272 andģ.750" bore and the same 3.300" stroke. Displacement was increased in 1955 to 272Ĭu.
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