I was checking out water pumps for my 360, and I noticed something interesting about the Gates replacement pumps for the magnum engines - they have a really nice, 'better' bypass nipple in their pumps...at least in the pictures of their pumps. The original nipples are 1" NPT (I think), and they have two slots in the edge...the edge that is supposed to seal the nipple to the hose...and I just thought what a stupid way to design a nipple. But the Gates pumps have a nipple that is solid all the way around...and so I picked up the phone. Talking with the tech guy at Gates, I asked...hey can I order just the nipple? Long story short, he took my info and a few weeks later I found a small box with 4 of their full-lip nipples at my doorstep. In case anyone would like to upgrade their magnum bypass nipples, the pn is #43034.

Hat's off to Gates - I sent this schematic...and they did the rest 👍



...I don't know how a nipple with two giant slots in it is supposed to seal to a hose...but the full-lip Gates nipples should definitely seal 'better'. Note the internal hex slots to install them -



and speaking of 'how to install them', I used a 1/2" bolt with a nut that fits perfect, and just crank it in -

I don't think the OE parts slots are for sealing. There a method to install the nipple.
Doug

yep I agree that the slots are for installing it...the outer lip tho is what makes the seal. As I understand you shouldn't 'need' the hose clamp to make a good seal - I think they're mostly to prevent the hose from slipping off the pipe/past the seal lip. I mean the original snap ring clamps don't make a total seal.

Regardless, the Gates nipples sure look like they'd seal much better - just wanted to pass on the info.