[DeTomaso] More time to plan

JDeRyke at aol.com JDeRyke at aol.com
Mon Jun 8 13:21:20 EDT 2009


Relative to your possibly bad eccentric inside the 351C block, there are 
two versions. The OEM is a 2-piece assembly with a hardened steel circular 
outer race that rotates around an eccentrically mounted steel inner section. 
There are no bearings or bushings: lube is by splash. The inner part is 
located to   the cam by a bent tab and a central bolt. If the tab cracks and/or 
the bolt loosens, both parts can move erratically. This problem is common to 
all Fords- even straight-six engines.

The second, maybe aftermarket eccentric is a one-piece hardened part that 
eliminates the rotating outer race. Its still lubed by splash-oil. It is 
considerably heavier than the earlier assembly and locates by several bolts- no 
tab. Safety-wiring the bolt-heads together should eliminate all failure 
sources. Note -some timing chain sets specify, 'NOT FOR ONE-PIECE FUEL PUMP 
ECCENTRIC'. Dunno why since I use an early assembly that fits all timing chains 
and gear-drive sets. FWIW- J Deryke


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