does the bung at the bottom of the radiator have a rubber o-ring? I supect it would but when i removed mine it seemed to be missing

 

are you talking about an oem radiator?? If so, I didn't have an o ring either and it was fine
Edwin

 

i just bought a koyo and its all super strong and ****, but it uses a cheesy plastic drainplug wtf

 

awww man I just bought a koyo too.... thank for letting me know after.. lol j/k

 

yes the stock radiator DOES have an Oring, check whatever it was you drained your fluids into, could be in there, or on the floor somewhere, could even still be on the bung or even hiding up in the hole where the bung goes.

 

yep talking about the stock radiator.

yes i checked everywhere and couldn't find it.
you sure spekdah? can some one confirm this

 

I have one on my pet-**** also.

 

The ABS plastic drain plug expands (when hot) at a rate that ensures there are no leaks through the threads. A metal plug would not only need the exact same expansion rate (more difficult than you think) but it would also be subject to seizing due to corrosion over time...and a plastic plug is a lot cheaper to make.

 

yeah positive
when I did my radiator relocation ( for my IC) i had to drain the fluid and in the process my radiator plug desintergrated but I was left with the rubber 0 ring. I got another new plug and it also came with an o-ring. so unless I have been a part of some great O-ring conspiricy I would have to say the evidence points towards " yes" there should be an 0-ring

 

pep boys $2, called a drain ****...Nissan/Mazda

 

Would you rather strip the threads on the radiator or the threads on the plug?

 

Confirm, since I was looking at it yesterday. The drain plug hole does have an o-ring.

If you're in a pinch and don't have the plastic plug a short M10x1.5 bolt seems to fit (you still need the o-ring)