Upper Radiator hose with ls1 water pump

[epfatboy]

Plan to run a ls1 water pump (front vs top hose inlet) and was wondering what upper rad hose options I have.

The radiator has passenger side Upper/Lower inlets.

The Truck is a '74

I have seen plent of options for a truck style water pump but can't use those. Even seen a few LS3 engine references but no radiator hose options.

Don't mind reducers or splicing if I have too, just want a few options to start with versus standing in front of 500 hanging hoses at Napa....

[LS short box]

On my LS projects I make a wire pattern and head on down to Oreillys and they let me poke around the store room and find a hose that is close. Typically I have to do a bit of trimming to get to work. I'm using 2002 Camaro water pumps. I wouldn't do a spliced hose. Just one more place to leak. Pic of my 68 C10.

[epfatboy]

Yeah, was hoping to avoid that but it looks like that is whats gonna happen. It's not a very complicated bend patterns so hopefully it's easy to find something.

[kglowacky]

I used a Gates #22436 hose and a 90-degree elbow off another random hose with a splice it has been working for 5 years with no issues. My LS is out of a 2002 Firebird. I assume the same water pump as you describe..


Sorry didn't see you have a pass side rad. Maybe this will help someone else down the road.

[epfatboy]

Ever try these at the splice?

Cleans it up a bunch

https://www.summitracing.com/search/...di4yqviyv5xfbp

Gates makes them too.

[LS short box]

On my 73 Camaro LS3 project I used a splice in the upper rad hose. I also welded a NPT "bung" into the bottom of the slice for the coolant cross over line. I used exhaust tubing that I welded a bead on both ends so the hose couldn't slip off. Never had an issue. Aftermarket splices with a bung are also available.
Pic.

[leegreen]

used these a couple times in swaps, never leaked. If you are worried double clamp it, like the standard has become on boats where a leak can sink you.

with steam vent
https://www.amazon.ca/gp/product/B0BKRS2GPN/
without
https://www.amazon.ca/gp/product/B09FJKPZ4X

[sfont66]

Originally Posted by epfatboy

Plan to run a ls1 water pump (front vs top hose inlet) and was wondering what upper rad hose options I have.

The radiator has passenger side Upper/Lower inlets.

The Truck is a '74

I have seen plent of options for a truck style water pump but can't use those. Even seen a few LS3 engine references but no radiator hose options.

Don't mind reducers or splicing if I have too, just want a few options to start with versus standing in front of 500 hanging hoses at Napa....

I’m a bit late but maybe this info will help someone…
I saved a few pics and info years ago when I was finishing my swap, I ended up with a splice in mine with different hose because I needed to reach the driver side, so no first hand knowledge.

Anyway take a look at a gates 22271