ROTARD

Hi, I am trying to modify the coolant fill neck on my 93 rx7. I cannot find a nipple for were the coolant overflow will be.
Can I buy and press one in, or should I get one machined from aluminum and weld it on?

Heres a picture of what I want, and what I have.

n1delsol

Tap and thread


Posted from Honda-tech.com App for Android

ROTARD

Thats what I thought too but I cannot find anything smaller than 1/8 NPT

redboost10

Is 1/8 too big?

SovXietday

Shouldn't be. Open the hole up as needed and put a 1/8 NPT thread in there then just screw in your fitting of choice.

ROTARD

Thanks guys, now that I think of it I guess it doesn't matter how big the hole is.

But when I thread in the nipple it looks like the pressure cap might hit it, should I thread it in, then grind down anything that protrudes inside?

CVC9216

there are 1/16 NPT fittings. or you can get something machined and pressed in. There is no pressure on that fitting

that-guy

put the cap on, find your placement, open the hole, tap it, screw it in, and for some added security, put a bead around it...20 minute job, MAX