Re: 1956 Packard Executive in France

Posted by HH56 On 2023/3/27 14:11:51

On the oil pump it appears to have the modification of removing the vacuum pump which was thought to be allowing air to enter and adding a heavy bottom plate substitution. That mod was developed by the Packards International Club back in the late 60s early 70s. Others have also done basically the same PI developed mod but then went farther with an additional mod to the housing to add a bushing and additional lubrication for the drive shaft. Cannot tell if the pump has that change.

In any case the PI plate mod only did not solve the problem and am not sure the bushing did either since it appears only a few of the bushing mods were done. Currently I believe the only change that has so far proven effective is to do the Olds oil pump conversion. I believe that kit is still available from Jack Vines. Note that there are two versions of the Olds pump -- standard and high volume. Reports have come back by some that the high volume version causes leaking oil seal issues.