2018 GX460, 101K miles.

2 Weekends ago when changing the oil I found the radiator was leaking. Picked up a new radiator (came with cap), upper/lower hoses, thermostat and belt all from Bell Lexus. Picked up in person, it's about an hour from my house.

Last weekend I replaced all the components. Finished up on Sunday 2 August. System was filled, burped, and drove it around on that Sunday to the store a few times and a couple other spots, maybe 15ish miles in the 115°F Arizona summer heat.

Monday Morning, 3 August, when my wife was on her way to an appointment, she calls me that the AC is coming off/on. The Temp gauge went to all the way cool. She got it to the appointment and shut off, I had to go pick her up. Had the car towed home.

Monday evening I filled with as much coolant as I had and just verified the truck would start. Ran for about 10 seconds.

Tuesday 4 August, I got more coolant from the dealer, that evening completely filled/burped the system. Ran the truck in the driveway up to temp, holding RPM at 2K, running with heat on full. No more bubbles out of the radiator, no white smoke out the exhaust. Was thinking I dodged a bullet.

Let the truck sit the rest of the week, didn't have time to do anything else.

Today, Saturday 8 August, went out this morning, put the skid plate back on and the air dams. Started it up and took it on a short trip of about 4 miles.

Radiator hose blew off again.

While I am confident I put it on right the first time, I was doubting myself and thought maybe I fucked it up. This time I can say with 100% confidence that hose was on correctly.

I'm starting to wonder if the leaking radiator was a red herring for some other more serious issue with the truck.

It's going to have to sit for a while, have some work travel.

Any input/advice is greatly appreciated.

Lower Radiator Hose Blew Off Again - Help Needed - 2018 GX460