Koyo Radiator Drain Plug Snap Off?? Would my Stock Drain plug Fit in my Koyo Radiator - RX7Club.com - Mazda RX7 Forum

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Koyo Radiator Drain Plug Snap Off?? Would my Stock Drain plug Fit in my Koyo Radiator

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Old 12-22-06, 07:56 PM
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Unhappy Koyo Radiator Drain Plug Snap Off?? Would my Stock Drain plug Fit in my Koyo Radiator

i guess they are called Drain ***** as well. im having a hard time finding these drain plugs. any of you guys have any idea which Plug i need in Brand name and Size?? or better yet a Part Number. i already tried autozone and Kragen and they dont have Squat!!!! my last resort is Pepboys.


i check the internet and i came out with this Plug.
https://www.dormanproducts.com/cgi-b...st=1384:1124:0

would that fit in the Koyo radiator ???

help is apprciaited
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Old 12-22-06, 08:00 PM
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the OEM plug should fit. the OEM radiators are Koyo also so i don't see why they would change the thread size.
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Old 12-23-06, 08:20 AM
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you'll need an fd drain plug. the fc one won't fit. I've bought them at both advance and o'riellys.
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Old 12-23-06, 08:38 AM
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10mm X 1.25 is the S4 size
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Old 12-23-06, 09:05 AM
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Originally Posted by Karack
the OEM plug should fit. the OEM radiators are Koyo also so i don't see why they would change the thread size.
Both of my N/A's say "Calsonic N350" not Koyo.. ?
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Old 12-23-06, 11:41 AM
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a very select few didn't have koyos, the majority came with koyo radiators from the factory.
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Old 12-23-06, 12:59 PM
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My last 2 sevens had the same Calsonic ones....... I'm not sure they are as rare as you think they are. But.... 7000+ > 200+
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Old 12-23-06, 01:14 PM
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or maybe i was thinking the Calsonic was actually a Koyo, i'll have to pay more attention to the radiator labels. i do know that some series came with an OEM koyo radiator though.
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Old 12-23-06, 01:24 PM
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All of the ones I'm thinking were 1991's. So.. maybe its 91's.... 91 was, after all, the WEIRD year.
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