1947 356 Oil Tappet Regulator
Posted by Don Skotty On 2012/7/17 10:46:20
For the lack of a 3cm piston and spring (quantity 2) the '47 356 engine couldn't be rebuilt.
The restorer tells me the Tappet Oil Regulator piston and spring (parts 351713 and 351712) need to be replaced. The figure below shows the location of the forward Tappet Oil Regulator (5.1718), and there is also one at the aft end of the block. The spring and piston reside within this assembly. My review of the 1941 through 1954 Packard parts manuals shows that these parts were only in the 1946 and 1947 356 engine (despite the 356 being available 1941 through 1954, war-years excluded).
I've checked all the regular suppliers of NOS parts - and some others. As expected, no one has these parts.
Does anyone know why the Tappet Oil Regulator was discontinued in the 1948-1954 engines?
Next, does anyone have a secret stash of the piston and spring? Or, a recommended source? My restorer suggests that I get the piston custom lathed and the spring custom made, and I have names of a couple of metro-Denver companies that can do this work. The spring maker has a minimum order of $150, so looks like I may end of with a hundred or so of these, and become the "go-to guy" for these parts for anyone rebuilding a 46 or 47 356.
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The restorer tells me the Tappet Oil Regulator piston and spring (parts 351713 and 351712) need to be replaced. The figure below shows the location of the forward Tappet Oil Regulator (5.1718), and there is also one at the aft end of the block. The spring and piston reside within this assembly. My review of the 1941 through 1954 Packard parts manuals shows that these parts were only in the 1946 and 1947 356 engine (despite the 356 being available 1941 through 1954, war-years excluded).
I've checked all the regular suppliers of NOS parts - and some others. As expected, no one has these parts.
Does anyone know why the Tappet Oil Regulator was discontinued in the 1948-1954 engines?
Next, does anyone have a secret stash of the piston and spring? Or, a recommended source? My restorer suggests that I get the piston custom lathed and the spring custom made, and I have names of a couple of metro-Denver companies that can do this work. The spring maker has a minimum order of $150, so looks like I may end of with a hundred or so of these, and become the "go-to guy" for these parts for anyone rebuilding a 46 or 47 356.
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