PACKARD SPARKPLUG SPECIFICATION CHART 1926-1942 ONLY

[mlander]

SPARKPLUG SPECIFICATION CHART

PASSENGER CARS-1926-1942

PACKARD ONLY

Thru 1929-Turbo Head.....78

1930 Turbo Head.............86

All thru 1931-Reg. Head...78S

1932..............................46

1933-34-35-36................45

1937-38.........................103S

1939-40-41-42...............106

I think there is a Packard TSB concerning 10MM plugs

fouling (oil) and heads being rethreaded for 14MM plugs.

M.L. Anderson