BESTgaket Rope Seals Stop Y-Block Leaks - Rope Tricks
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Ford 312 Y-blocks (identified by seal retainer stamping "ECZ") have a unique problem not found in most other engines. The seal housing area in the block and lower seal retainer is very shallow-compare the 292 retainer on the left to the 312 on the right. Most engines have a deep V-groove to house the rope seal, holding the rope firmly in place. Being shallow and without the V-shaped recess, the 312 rope seal can grab hold of the crankshaft and spin, ruining everything. This can happen most often on initial start-up. View Related Article
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