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Hey! Nice Rack! "Celette"
 
rich's Avatar
 
Join Date: Jan 1999
Location: Superior WI USA
Posts: 1,634
Garage
Anyone know the size and thread pitch...

Anyone know the size and thread pitch for the oil drain plug? Does it equal an AN (army/navy) size? I'm working on moving my drain from the strainer to the pan. I want to change the drain plug to a fitting.

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Old 12-04-2007, 09:06 PM
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Join Date: Dec 2007
Posts: 247
I believe it is around an M20/1.0 thread, though I would have to confirm that with the spare I have in my garage.
Old 12-05-2007, 09:32 AM
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What year engine? I believe it changed either in 85 or 87.
Old 12-05-2007, 09:46 AM
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Join Date: Aug 2006
Location: Cincinnati, Ohio
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There are two different threads...no way it is A/N....it's metric and helicoiled for sure. Best to get a thread gauge, but someone on here should know. I would think M20 or M22

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Big Gun: 1988 928S4 Twin Turbo, 5-SPD/LSD 572 RWHP, 579 RW ft-lbs, 12 psig manifold pressure. Stock Internals, 93 octane.
Little Gun: 1981 928 Competition Package Twin Turbo, 375 RWHP, 415 RW ft-lbs, 10psig manifold pressure. Nikasil Block, JE2618 Pistons, 93 octane.
Old 12-05-2007, 06:09 PM
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