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

[JonnyTahoe]

So it's a bad thing that my 2001 has a top rad hose that is marked 10-31-00?

It's on my list of stuff to do. It's a long list.

Sent from my SM-S727VL using Tapatalk

That's great. I have a early production 2000 the date on them was like 10-99.

 

[JonnyTahoe]

Pretty much everything on this truck is original.
Original hoses and radiator for sure. Fan clutch and water pump I believe were replaced by previous owner.

I did this job quick. Just popped off the lower rad hose and then thermostat and replaced it.
Then filled back up.
Im thinking since this truck is 20 years old, this summer I might go ahead and replace all the hoses. Dont need them busting open on me thats for sure. What u guys think?

Sent from my SM-G975U using Tapatalk

Your water pump has possibly been replaced several times. I only got four years out of a Brand New Napa Pump.

 

[OR VietVet]

Any kind in particular? Or just gates hoses from oreillys?

Sent from my SM-G975U using Tapatalk

Gates is good or AC Delco. I am a firm believer in GM products for my GM vehicle.

 

[JonnyTahoe]

Any kind in particular? Or just gates hoses from oreillys?

Sent from my SM-G975U using Tapatalk

Gates will be fine probably cheaper too. The lower hose removal is not going to be easy if it has the original spring clamp on the end that goes to the Radiator. I ended up having to remove the lower Trans cooler line to make room to get the clamp off even with a special spring clamp pliers.

 

[UmmScott]

Gates will be fine probably cheaper too. The lower hose removal is not going to be easy if it has the original spring clamp on the end that goes to the Radiator. I ended up having to remove the lower Trans cooler line to make room to get the clamp off even with a special spring clamp pliers.

Those clamps are best to keep also. I always resuse them. Constant tension clamps beat a screw or worm gear clamp anyday

Sent from my SM-G975U using Tapatalk

 

[JonnyTahoe]

Those clamps are best to keep also. I always resuse them. Constant tension clamps beat a screw or worm gear clamp anyday

Sent from my SM-G975U using Tapatalk

They don't loosen up that's for sure.

 

[BaMaDuDe87]

I've been dealing with a loooooooong warm up time for about two years (Started after a radiator replacement) and I am about to just get rid of the hoe. Two water pumps, three thermostats, new coolant temp sensor, clutch fan on, clutch fan off it doesnt seem to make a difference. Usually only gets to about 180 and takes forever to get any kind of heat.

Running pressure tests on the cooling system today. Engine off, it holds steady pressure. Engine on, it holds steady pressure. Engine running, it doesn't seem to be creating any pressure on its own.

It's about 56* where I am, idling for about 30 min, temp around 175-180, but no pressure building in the cooling system so far. Can I just plug that top hose (going back to the overflow tank) on the radiator for a bit to see if it helps speed up warm up time?

Sent from my Pixel 2 XL using Tapatalk

 

[OR VietVet]

Several threads here about that. You don't want to plug it but you can restrict it. Use a small hose clamp and cinch it a bit and see what happens. You can adjust the hose clamp as needed.

 

[JonnyTahoe]

I've been dealing with a loooooooong warm up time for about two years (Started after a radiator replacement) and I am about to just get rid of the hoe. Two water pumps, three thermostats, new coolant temp sensor, clutch fan on, clutch fan off it doesnt seem to make a difference. Usually only gets to about 180 and takes forever to get any kind of heat.

Running pressure tests on the cooling system today. Engine off, it holds steady pressure. Engine on, it holds steady pressure. Engine running, it doesn't seem to be creating any pressure on its own.

It's about 56* where I am, idling for about 30 min, temp around 175-180, but no pressure building in the cooling system so far. Can I just plug that top hose (going back to the overflow tank) on the radiator for a bit to see if it helps speed up warm up time?

Sent from my Pixel 2 XL using Tapatalk

I think you can rule out the T-Stat. Those New Radiators make a big difference so you got that Handled. I never had that issue but everything you have done is exactly what I would of done.

 

[JonnyTahoe]

I've been dealing with a loooooooong warm up time for about two years (Started after a radiator replacement) and I am about to just get rid of the hoe. Two water pumps, three thermostats, new coolant temp sensor, clutch fan on, clutch fan off it doesnt seem to make a difference. Usually only gets to about 180 and takes forever to get any kind of heat.

Running pressure tests on the cooling system today. Engine off, it holds steady pressure. Engine on, it holds steady pressure. Engine running, it doesn't seem to be creating any pressure on its own.

It's about 56* where I am, idling for about 30 min, temp around 175-180, but no pressure building in the cooling system so far. Can I just plug that top hose (going back to the overflow tank) on the radiator for a bit to see if it helps speed up warm up time?

 

[JonnyTahoe]

.

 

[JonnyTahoe]

.

 

[JonnyTahoe]

.

 

[JonnyTahoe]

.

 

[JonnyTahoe]

.

 

[JonnyTahoe]

.

 

[JonnyTahoe]

.

 

[JonnyTahoe]

.

 

[OR VietVet]

Get an infrared temp gun and measure the temps at the heater core hoses. Those guns are very inexpensive. If is flowing good the temps should be close to the same on each. The hose should be hot enough that it is hard to grab with your bare hand. You could have a clogged heater core that is not flowing all across the core and therefore the heat inside will suffer but I doubt that because that will not effect the temp reading at your dash gauge.

 

[BaMaDuDe87]

It's looking like the tight hose clamp on the hose going to the coolant tank is working......fingers crossed. I put it on, tightened the shit out of it, and it seemed to actually get to temp.

Will try again in the morning when I haven't been running it half the day.

Would really like to find a reducer to go in the hose or something more permanent than a ugly hose clamp on the hose. I'm sure at some point the hose clamp will rub a spot through the hose the way it is now, but I'll keep testing it this way until I find a better way.

Sent from my Pixel 2 XL using Tapatalk