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oil pan drain plug thread size - '98 502 MAG MPI?

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oil pan drain plug thread size - '98 502 MAG MPI?

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Old 02-19-2022 | 04:50 PM
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bajaman
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Default oil pan drain plug thread size - '98 502 MAG MPI?
Anyone know the thread size? I've seen references that suggest 12mm X 1.75 pitch...just wanting to know for sure.
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Old 02-19-2022 | 05:11 PM
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BillK
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I just got one for a Gen6 454 and it was 12mm x 1.75 The 502 is probably the same. I have a 502 sitting at the shop I can check next week if nobody answers for sure.before then.
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Old 02-19-2022 | 06:05 PM
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DrFeelgood
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809911 12mm x 1.75 from the merc catalog.



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Old 02-19-2022 | 06:29 PM
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thanks!
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Old 02-19-2022 | 06:43 PM
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By the way if you go to the parts store and ask for one for a 1999 Tahoe with a 5.7 engine it will be correct. Same one my Tahoe uses.
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Old 02-20-2022 | 06:27 AM
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Thanks again, everyone.
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