Expansion plug size

[The Oil Soup]

Does anyone have a part number for the expansion plug on the back of a 218/230 block at the camshaft? The hole is about 1.384".

[TodFitch]

The index/illustration at the front of the engine section of my '36-'48 parts book says that part should be in group 9-16-6 but I don't see a listing for it there. In the meantime, the plugs I see in group 200 of the standard parts book come in 16ths of an inch sized and your measurement does not seem to match up with any of them.

 

The closest I see would be 1 7/16 (1.4375) inches. For that, the original Chrysler number is 105603 and it is listed as being made of steel (no brass listed in that size). I am having a difficult time with the Dorman site looking for their number for that part but it is likely they carry it.

[9 foot box]

   Maybe these numbers will work. Dorman 560-019 brass 1 3/8”, 550-019 steel 1 3/8”. My block has Melling plugs, P12B brass for the cam and P14B for the 1 5/8” plugs. The rear plug is a P14 steel plug. I don’t know if Melling makes plugs any more, but they have oil pump kits and cylinder liners. The shop that did my engine might have used up their inventory.

[The Oil Soup]

The plug I pulled from a '51 218 was original and was steel so perhaps being in contact with motor oil rather than coolant is the reason for the steel. Maybe the Dorman 550-019 1.375" would expand enough? I'll give it a try.