What could be busted, coolant leaking out 2000 Yukon Denali

[SBdadman]

So I noticed coolant was low, and mistakenly thought it was leaking from a busted coolant reservoir tank, so I changed the reservoir and hose.

Filled up reservoir with coolant to line, and it sat overnight, nothing leaking out underneath or dripping.

Crank it up and drive it and get to bank, get out and nothing still, go in and come back out and notice coolant dripping into a puddle underneath.

It appears to be dripping out near the front of the engine block near the bottom, right above the bottom pulley/belt?

Hasn't shown any overheating or anything on the actual dash. I took a video of the leak, any idea if it's water pump or thermostat or something bigger/smaller?

 

[jaywoo65]

Edited because I'm a dmbass. Water pump!!

 

[02Burgundybeast]

Id go with water pump.

 

[HiHoeSilver]

So I noticed coolant was low, and mistakenly thought it was leaking from a busted coolant reservoir tank, so I changed the reservoir and hose.

Filled up reservoir with coolant to line, and it sat overnight, nothing leaking out underneath or dripping.

Crank it up and drive it and get to bank, get out and nothing still, go in and come back out and notice coolant dripping into a puddle underneath.

It appears to be dripping out near the front of the engine block near the bottom, right above the bottom pulley/belt?

Hasn't shown any overheating or anything on the actual dash. I took a video of the leak, any idea if it's water pump or thermostat or something bigger/smaller?

If you had a flashlight up there with that same angle video, we could probably see better. Tough to say, could be either source mentioned above... Hoping for the pump. That's cheap and easy.

 

[BlueCollarTahoe]

water pump

 

[afpj]

Our intakes are dry. It's either the water pump/thermostat/hoses or possibly the coolant hose to the throttle body. The latter item leaking would be much rarer compared to the waterpump.

 

[M1Gunner]

With that location and amount of flow I'd be willing to put money on the water pump.

 

[StevenDey92]

I would go with waterpump!

Sent from my SM-G930V using Tapatalk

 

[rockola1971]

Weep hole is leaking your coolant out. The weep hole is there to show you that the mechanical seal of the water pump shaft (pulley attaches to) has failed and is now letting coolant get into the front bearing of the water pump. It wont be long...

And its impossible for it to be a intake manifold gasket since the Gen 3 and 4 motors have zero coolant flowing through their intakes.

 

[Silverbeast]

just replaced my intake on my 00 with 134k. The leak was behind the alternator cost me 1000 !!