1948 288 Expansion /Welch plugs

Posted by Richard A. Alwes On 2009/9/9 8:23:37

Still chasing the my PACKARD wants to overheat issue. Have gone down the list of recommendations and I am now thinking about removing the five freeze plugs and scraping out any build up. I need to determine the which size freeze plug that is correct for the 1948 288 engine. Would like to have everything on hand before I start this repair. I must be dense because I cannot find the information in literature and manuals. Where can copper freeze plugs be purchased?
What I have checked so far.

1. Timing dead on
2. Water pump
3. Fan Belt
4. Radiator was serviced and cleaned two leaks fixed
5. Thermostat installed
6. Correct radiator cap installed
7. Water distribution tube checked and it is clear no build up
8. Head gasket all cylinder compression are in range