Re: Packard Tool J-2553, Need Tool or Specs.

Posted by Tim Cole On 2011/5/14 9:29:58

Dear JD:

I've done dozens of these jobs and never used Tool
J-25whatever.

To obtain proper lifter preload the following procedure is pretty much universal for all zero lash motors including the Kettering V-8.

a) Remove the valves keeping them in numbered order.
b) Remove the hydraulic tappets keeping them in numbered order
c) Using solvent and lint free rags carfeully clean and remove all oil from the tappet bodies. These must be dry and free from any oil.
d) Clean the tappets in solvent as well.
e) Upon assembly the specified preload can now be obtained via valve stem grinding.
f) Upon final assembly the lifter bores can be primed for silence upon intial start up.

It is essential for optimum results that the grinding be carried out using equipment in good condition and personnel who understand the principles of boundary contact between metal surfaces.


Good luck.