Thread Size?
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Joined: Dec 2010
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From: Southern NJ
Car: '09 Pontiac G8 GT - 12.76@109
Engine: 436HP 6.0L
Transmission: 6L80E
Axle/Gears: 2.92
Thread Size?
I need help with a thread/plug size...
On the factory radiator, passenger side, the very bottom hole is a plastic-looking drain plug with a wing-shaped holder to turn. NOT this bottom one.
The hole RIGHT ABOVE that bottom one. What is that hole/thread size?
Second one from the bottom.
I'm thinking 1/2" NPT???
Thx for the help...
On the factory radiator, passenger side, the very bottom hole is a plastic-looking drain plug with a wing-shaped holder to turn. NOT this bottom one.
The hole RIGHT ABOVE that bottom one. What is that hole/thread size?
Second one from the bottom.
I'm thinking 1/2" NPT???
Thx for the help...
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Thread Size?
if its the one im thinking about, its the return line for the trans cooler. and i think it is 1/2" npt.
Thread Starter
Member
Joined: Dec 2010
Posts: 140
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From: Southern NJ
Car: '09 Pontiac G8 GT - 12.76@109
Engine: 436HP 6.0L
Transmission: 6L80E
Axle/Gears: 2.92
Joined: Aug 2006
Posts: 12,803
Likes: 103
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Thread Size?
cant help for sure with the sizes, but its definatly not 1/2 npt. They are flare type fittings have have straight threads, NPT threads are not straight. If i had to guess, they are closer to a 5/8-18 thread since thats the common nut size for 3/8 tube
Joined: Oct 2001
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Thread Size?
Did they switch to a metric fitting or is it standard? If they switched anyone know the year??
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Joined: Mar 2007
Posts: 3,525
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Thread Size?
i looked up the specs on my aftermarket rad and it says 1/2" -20 thread for the cooler ports. so yea doesnt look like its npt, my bad.
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Joined: Aug 2006
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From: Central NJ
Car: 86 Trans Am
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Axle/Gears: Moser full floater m9, 3:70 trutrac
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