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93' 502 Oil Pan drain Plug Fitting ????

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93' 502 Oil Pan drain Plug Fitting ????

Old 04-16-2009, 04:39 PM
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Default 93' 502 Oil Pan drain Plug Fitting ????

I am pulling my engines out before the season and wanted to install a oil drain system from the drain plug on the Pan. (Not go through the dip stick anymore) Does anyone know the size of the threads of that fitting. ??? I think Merc makes a fitting with hoses doing the same for other engines.?? Does anyone know the part number and if the fitting wpuld be the same on my 502 Pan.


Thanks in Advance
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Old 04-16-2009, 06:50 PM
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My 454 was metric threads, can't remember the pitch, sorry.

Ken
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Old 04-16-2009, 07:49 PM
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1/2 - 20
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Old 04-16-2009, 07:52 PM
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Went metric in 1996
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Old 04-17-2009, 06:19 AM
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they are metric now, not sure when they switched, when I installed the new GM vortec big blocks I had to tap the plug threads back to american so I could reuse my crusader either side dipsticks..Rob
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Old 04-17-2009, 08:04 AM
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Originally Posted by Pismo10
Went metric in 1996
Then1/2-20 it is. That is what my '87 small block was.

Ken
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