2000 Yukon-Long warm up time - partial heater core restriction possibly?

[BaMaDuDe87]

Can anyone with a stock radiator, pull the hose going to the overflow tank and snap a pic of what the outlet on the radiator look like? Thank you in advance

Sent from my Pixel 2 XL using Tapatalk

 

[ks03]

This is what I came up with when I was chasing what I eventually figured out was a coolant temp sensor problem. It did bump my temp 1-2degrees. It’s made of 1/2” aluminum round, 3/32 hole drilled through. The restriction in the output on my radiator I would guess at 5/32”

 

[BaMaDuDe87]

Geezeeee that's tiny hole. Did you just put that in the return tube going to the tank and let it ride?

Sent from my Pixel 2 XL using Tapatalk

 

[new2yukon]

Can anyone with a stock radiator, pull the hose going to the overflow tank and snap a pic of what the outlet on the radiator look like? Thank you in advance

Sent from my Pixel 2 XL using Tapatalk

I just replaced mine a week ago. Still have it. Here ya go...

 

[BaMaDuDe87]

I just replaced mine a week ago. Still have it. Here ya go...

View attachment 245105 View attachment 245106 View attachment 245107 View attachment 245108 View attachment 245109

Perfect. Thank you!

Sent from my Pixel 2 XL using Tapatalk

 

[ks03]

Geezeeee that's tiny hole. Did you just put that in the return tube going to the tank and let it ride?

Sent from my Pixel 2 XL using Tapatalk

yep, just rides in there. 1/2” round seems to be snug enough to not move, but not so tight I can’t work it back out of the hose. Hose is meant to be an air bleed. once air is initially bled out of the system and if coolant isnt boiling in the heads anywhere, the hose doesn’t need to be there during normal operation. So it’s really just how small of a hole do want to risk being plugged if you started to overheat. I guess I’d be more concerned about it plugging up if I was running dexcool. While it’s running I can shine a flashlight into the tank below the air bleed hose and see the shadow of the tiny coolant stream shooting out.