Bypass hose nipple removal from aluminum intake manifold

If you have a torch, I heat the nipple until it’s cherry red and keep it there for about 30 seconds. Turn off the torch and spray the nipple with WD-40 or similar. Give it a good shot of it, and if you are of the type that likes it, you may get a contact high off the smoke (that’s a joke for all you prude types...don’t breath the smoker off that crap).

The rapid cooling of the nipple will shrink it enough to get it out, usually fairly easily.

You can also use paraffin. I know some guys use candles and stuff the candle up against the nipple and manifold where the two come together.

What ever you use, it should make the nipple come out easy and without damaging anything.