What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[Scrappycrow]

I have never had luck with that on modern, high pressure systems.
They always seemed to leak like crazy and you couldn't go but a few miles.

Unless you're putting significant load on the engine, you can leave the pressure cap loose or off and you'll have far less leakage. Yes, you obviously lose the advantage of pressurization, but so long as you have coolant (meaning not just water), you still have a margin before boil-over.

I've done this on a few vehicles, from an RV that developed in a tear in the upper radiator hose, to a BMW that had the upper radiator hose inlet break off the radiator (the hose couldn't hold onto the stub with pressurization, but held fine unpressurized).

 

[Scrappycrow]

@Scrappycrow Yes, these are the ones. Not any different as far as removal than the plastic ones.

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Thanks, Y'all!

 

[89Suburban]

NOOO, you just seal off the heater hose lines in case of emergency, just like folding a garden hose in half

I keep a nipple and spring clamps in the truck just for this situation it it arises.

Link:

3 Pcs Air Hose Fittings 5/8" Brass Hose Barb Fitting Metals Splicer Mender, Barb Hose Union Fuel Gas Water: Amazon.com: Industrial & Scientific

3 Pcs Air Hose Fittings 5/8" Brass Hose Barb Fitting Metals Splicer Mender, Barb Hose Union Fuel Gas Water: Amazon.com: Industrial & Scientific

www.amazon.com

 

[j91z28d1]

I have never had luck with that on modern, high pressure systems.
They always seemed to leak like crazy and you couldn't go but a few miles.

leave the cap on the first click so it doesn't build pressure.

limped a Ford work truck from baton rouge to Nola with just masking tape wrapped up the top radiator hose that way..

 

[Rocket Man]

I haven’t done much to the Tahoe (or any of the trucks) lately, just installed new JBL door speakers. At least one of the old Bose was blown, torn cone. The system sounds pretty good after dialing in the new Pioneer with the new speakers. The Bose amps in these aren’t bad, they just need better input than what the crappy sound of the stock head units provides. These speakers are 3 ohm and seem to provide a good balance in my truck. The old Bose speakers were 2 ohm in the front and 4 in the back iirc.

 

[Grady_Wilson]

leave the cap on the first click so it doesn't build pressure.

limped a Ford work truck from baton rouge to Nola with just masking tape wrapped up the top radiator hose that way

What was the ambient temp when you guys limped them home?
Until this last year, I lived in So Cal where 80+ degree weather was the norm, with 110+ in the summer.
You're not getting very far with a compromised cooling system.

 

[j91z28d1]

What was the ambient temp when you guys limped them home?
Until this last year, I lived in So Cal where 80+ degree weather was the norm, with 110+ in the summer.
You're not getting very far with a compromised cooling system.

honestly don't remember, but it wasn't windows down weather. it's not really temp hot down there, but humid as hell.

it was an f250 with a big belt driven fan and we weren't towing anything. no lack of cooling capacity for cruising along on flat interstate. thing could be half full of water and sitll be fine.

 

[Grady_Wilson]

From what I've read, higher humidity increases cooling ability of your car's cooling system, it doesn't hurt it.
So, warm, dry air is much harder on your car's cooling system.

 

[Doubeleive]

when mine broke on my 00 probably close to 20 years ago I just folded the hoses over and tied them off and drove it home
you have to do both hoses, now I carry zip ties and duck tape in the jack storage area along with a few other things, plenty of room in there
rope, gloves, jumper cables, not really sure what else I would have to go look lol
every time I go dig in there it's like felix the cat's black bag.
if you do the hoses and T's before there 10 years old then it will probably never happen.

reminds me of a time me and some friends were out screwing around in San Diego, we were all around 21 or so and 6-7 of us would go out on the weekends and drive all over and get drunk, we took turns with 1 of us being the designated driver. we used to "borrow" these 3 bothers mom's car and that dam thing had a coolant leak or something and we always had to stop and top it off once in a while and it would be fine, but we were in sitting in a jack in box drive thru and the thing started to overheat so we jumped out, popped the hood and one guy went to add some water, took the cap off and in a half drunken stupor inhaled a volcano of hot water/coolant, he instantly ran off screaming and I am not sure who all chased him but I was one of them, we happened to be right next to mission bay at pacific beach and he ran into the bay and was screaming he was burning, he literally died about 3 times and I resuscitated him each time, he ended up spending about a month in the hospital. that was kinda crazy, he was in the water and just stopped breathing, so we took him up on shore and I brought him back to life, he jumped up ran in the water again, repeat, we finally held him down on the beach and kinda just threw water on him till the ambulance showed up. I guess he burnt his throat and lungs according to what the doctor said.

 

[Scrappycrow]

What was the ambient temp when you guys limped them home?
Until this last year, I lived in So Cal where 80+ degree weather was the norm, with 110+ in the summer.
You're not getting very far with a compromised cooling system.

For my RV, it was ~90°F in dry weather in South Dakota. I was able to do ~50 MPH for ~60 miles. This was a Class C with a 350/TH350 and 4.11 gearing.

For my BMW, it was two weeks of commuting during a humid Georgia summer. So, ~600 miles at ~75°F in the morning and ~90°F in the afternoon.

Not to be combative, but is seems as if you've got a Nirvana Fallacy going. No one is saying these emergency hacks are equivalent to a properly functioning cooling system, but you seem to be rejecting imperfect temporary measures because they don't meet a high standard. What's the alternative to these imperfect measures? Being stuck somewhere.

 

[Grady_Wilson]

For my RV, it was ~90°F in dry weather in South Dakota. I was able to do ~50 MPH for ~60 miles. This was a Class C with a 350/TH350 and 4.11 gearing.

For my BMW, it was two weeks of commuting during a humid Georgia summer. So, ~600 miles at ~75°F in the morning and ~90°F in the afternoon.

Not to be combative, but is seems as if you've got a Nirvana Fallacy going. No one is saying these emergency hacks are equivalent to a properly functioning cooling system, but you seem to be rejecting imperfect temporary measures because they don't meet a high standard. What's the alternative to these imperfect measures? Being stuck somewhere.

I've just never had them work for me.
But that was always in very hot, dry conditions.
Only thing I have had work is on a 60's car, bypassing a leaking heater core back into the block.
But with the coolant that was lost so the system was low, it ran a little hot at freeway speeds.

 

[Charlie207]

So..... would this fit on a GMT900 Yukon?

 

[Doubeleive]

So..... would this fit on a GMT900 Yukon?
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I think I have seen pictures of it done, but expect obstacles

 

[bigrhino]

Someone put a small dent in my driver side door!

 

[j91z28d1]

From what I've read, higher humidity increases cooling ability of your car's cooling system, it doesn't hurt it.
So, warm, dry air is much harder on your car's cooling system.

yeah, I'm no engineer but I'm told by ac guys that in humid weather the heat transfer from the condense is less efficient than in drier. so I've always gone with it but I don't know.


I've never had much of a problem with cooling systems unless they are really low on water.

 

[Grady_Wilson]

AC is completely different than cooling an engine.
And yes, high humidity is harder on the AC system since AC systems are heat pumps, in reverse.

 

[j91z28d1]

AC is completely different than cooling an engine.
And yes, high humidity is harder on the AC system since AC systems are heat pumps, in reverse.

I don't know. seems to me the condense is just radiator with hot stuff in it transfering it's heat to air as it flows thru it. same same?

even both made of aluminum.

anyways. yeah not had a problem with things cooling with a cap left loose. I'm now towing are racing it, just getting back home, if a cooling system can handling the extreme conditions, it should be fine to get you home just diving along without much load. the pressurized system is really just to raise boiling point, but if you never make it to the boiling point, it's not a huge benefit. lot of our system at work run no over flow tanks and 7 psi caps. they run about 3in low on coolent since they can't suck water back in when they cool. big radiators and belt driven fans. never an issue even in tx heat. most things have a good amount of head room engineered in.

 

[Grady_Wilson]

I've never had to limp home with a more modern car.
I change hoses and whatnot before I have an issue so I don't run into those situations.
But I have seen where people try and tape hoses and they never get very far.
When I was younger and didn't have the money to do preventative maintenance, I have had to limp home with 60's or 70's cars. And for sure those cooling systems are nowhere near as robust as modern cooling systems.
Even a slight loss of water or pressure would lead to overheating in most cases.
My antique cars have a larger margin where water can be lost and not affect cooling as much as 60's and 70's cars.
My 1929 takes 9 gallons to fill the radiator and engine.

As for AC systems and humidity, here is a little bit on that front -

Humidity is also an important factor in air conditioning performance. When humidity is very high, the AC system expends most of its effort removing the moisture out from the air. This decreases overall performance, as well.

 

[CMoore711]

So..... would this fit on a GMT900 Yukon?
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It’s doable. Not sure on the details and I’m sure there’s some custom items involved. But yes doable…

Google “Durabaurb Sierra front end conversion”. Those guys have some quite a few.

 

[Rocket Man]

So..... would this fit on a GMT900 Yukon?
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Just google “2012 Sierra front clip swap onto 2012 Yukon” and you’ll see there’s not much. Seems the body lines are different enough that it doesn’t look right. It will bolt up, I believe.