Lou Earle Posted November 6, 2011 Report Share Posted November 6, 2011 Was looking on napa for head gasket- found that a 48 gasket is 38 bucks and the 54 gasket it 46. I thought they were interchangeable am I wrong? lou Quote Link to comment Share on other sites More sharing options...
james curl Posted November 6, 2011 Report Share Posted November 6, 2011 Depends whether they are by pass or internal. The internal with the bulge in the front of the head will work on a by pass engine but not the other way around. If you use an external by pass gasket on an internal by pass engine the gasket will leave the hole in front of the block and head open to atmosphere an the coolant will leak out . Quote Link to comment Share on other sites More sharing options...
JohnTeee Posted November 6, 2011 Report Share Posted November 6, 2011 (edited) AutoZone FelPro 7564 C Dodge, Plymouth 6 281 (218???) Engine 1934-54 230 Engine (except Canadian built) 1949-59 Dodge Truck 6 218, 230 Enging 1937-60 Replaces No. 1326318 $25.99 It's the internal bybass gasket, so is backward compatible with the external bypass engines. Same type I pulled off my engine, which is external bypass. Cheers! John Edited November 6, 2011 by JohnTeee Added picture Quote Link to comment Share on other sites More sharing options...
TodFitch Posted November 6, 2011 Report Share Posted November 6, 2011 A lesson in not always trusting stuff printed on a package to be error free: No such thing as a 281 L-6 Plymouth engin. 1934 does not use the same head gasket as 1935 and up. The 33 and 34 engines are a bit narrower as they don't have the water distribution tubes and full length water jacket. AutoZoneFelPro 7564 C Dodge, Plymouth 6 281 (218???) Engine 1934-54 230 Engine (except Canadian built) 1949-59 Dodge Truck 6 218, 230 Enging 1937-60 Replaces No. 1326318 $25.99 It's the internal bybass gasket, so is backward compatible with the external bypass engines. Same type I pulled off my engine, which is external bypass. Cheers! John Quote Link to comment Share on other sites More sharing options...
deathbound Posted November 6, 2011 Report Share Posted November 6, 2011 AutoZoneFelPro 7564 C Dodge, Plymouth 6 281 (218???) Engine 1934-54 230 Engine (except Canadian built) 1949-59 Dodge Truck 6 218, 230 Enging 1937-60 Replaces No. 1326318 $25.99 It's the internal bybass gasket, so is backward compatible with the external bypass engines. Same type I pulled off my engine, which is external bypass. Cheers! John This may be a stupid question, but it lists Dodge, Plymouth 6 281 (218???) Engine 1934-54 230 Engine (except Canadian built) 1949-59......does this include my 1938 Plymouth 201 c.i.? Quote Link to comment Share on other sites More sharing options...
jchalk1949 Posted November 6, 2011 Report Share Posted November 6, 2011 You may want to view my earlier thread "Felpro Gaskets". I really don't know if I would use Felpro again. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted November 6, 2011 Report Share Posted November 6, 2011 I did read your thread..and as they recommended a spray gasket sealer is kind of an insurance against user prep and to help ensure seal ..often most folks will use an air body file and 120 to clean the surfaces with...this is the reason for the spray recommendation...note also that the company making the gasket has no control over the condition of the block or head in cleaning/prep and even the best gasket can accommodate for only X amount of warpage..a machinist parallel bar and a good feeler gauge can often tell you right up front if there is a chance of non-sealing..a gasket is only needed to prevent leaks on not matched ground surfaces.. Quote Link to comment Share on other sites More sharing options...
TodFitch Posted November 6, 2011 Report Share Posted November 6, 2011 This may be a stupid question, but it lists Dodge, Plymouth 6281 (218???) Engine 1934-54 230 Engine (except Canadian built) 1949-59......does this include my 1938 Plymouth 201 c.i.? The 1935 through 1941 201 engines use the same head gasket as the 1942-48 (and maybe later) 218 Plymouth engines. Part number 1117542 for the head gasket by itself, part number 1064733 for the "Valve Grind Gasket Set" that also includes valve cover gaskets, thermostat housing gasket, etc. Quote Link to comment Share on other sites More sharing options...
jchalk1949 Posted November 6, 2011 Report Share Posted November 6, 2011 Tim, the block and head on my car were checked and passed muster. The felpro one sided copper gasket still leaked. Maybe someone else would have better luck than I with this gasket. Something to think about, if they made a mistake on their labeling, what else might they made a mistake on? Quote Link to comment Share on other sites More sharing options...
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