Welch plug size for rear of block?

Oldskoolrob

Oldskoolrob

Active Member
Hi Groovers, Part number is 612898, two welch plugs for the rear of the block. I can't find their specific size to get brass ones. I know it must be on here somewhere but I haven't found it using the search function. Sad story is that when I did my plugs I (apparently and now obviously) used a poor sealant, which I now discover upon installation of my radiator when I filled it.....dammit. I know the eight along the sides are 1.5" and I'm happy to have them in steel, but I'd rather brass for the hardest to get ones. Cheers.


EDIT: Further research - it appears they're the same size? Why the different part number?
 
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I just measured one on a P6 V8 block and it is approx 1 1/2”, looks to be the same depth as sides.
Camshaft plug is @ 1.800”
 
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I have a problem with pno 612898 - my book shows it as fitted UNDER the block at the rear, not apparently sealing anything, just a hole. Sure you are not speaking of the oil gallery plugs 602212, which are screwed in, or 602152, core plugs for block?
 
jp928 said:
I have a problem with pno 612898 - my book shows it as fitted UNDER the block at the rear, not apparently sealing anything, just a hole. Sure you are not speaking of the oil gallery plugs 602212, which are screwed in, or 602152, core plugs for block?
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Yep all good JP- I was referring to the 2 plugs opposite the cam plug. Turns out they're the same size as the side ones.
 
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