trimacar Posted October 26, 2007 Share Posted October 26, 2007 Hi- I took apart the top end of my 1604 a year ago, am getting it back together to start this weekend (as in smoke coming out the exhaust). I can not find spark plugs in my pile of removed parts; what current plug is correct for this engine? thanks in advance, David Coco, Winchester Va. Link to comment Share on other sites More sharing options...
Rusty_OToole Posted October 27, 2007 Share Posted October 27, 2007 All Packards from 1940 to 1953 used AC-104 or the equivalent Auto-Lite P4 or Champion Y4A.Gap .028Sorry that's all I can tell you, my reference book only goes back to 1940. But I believe they used the same 10 MM plugs back to 1937. Maybe someone else can confirm if this applies to your 38? Link to comment Share on other sites More sharing options...
Rusty_OToole Posted October 27, 2007 Share Posted October 27, 2007 Champion's modern equivalent to the Y4A plug is the UY6. It is a 10MM, 1/4" reach, with a 5/8 hex. Link to comment Share on other sites More sharing options...
Owen_Dyneto Posted October 27, 2007 Share Posted October 27, 2007 The Autolite website recommends their #3136 for the 1938 Super Eight (and the Eight as well). This is their standard plug, there may also be recommendations for platinum tip but I didn't check. Link to comment Share on other sites More sharing options...
Dave Mitchell Posted October 27, 2007 Share Posted October 27, 2007 If they are 10mm, try the AC M-8s. Link to comment Share on other sites More sharing options...
trimacar Posted October 27, 2007 Author Share Posted October 27, 2007 Hi- thanks, guys, great response. Off to the auto parts store, plan to hear it run this weekend. The parts I received from you, Dave, will finally be put to use! Thanks again, David Coco Link to comment Share on other sites More sharing options...
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