I need experienced help re: Water pouring out exhaust

[Bill 1960]

Does the Tahoe have a rear heater? I cannot find a clear path for coolant to flow out the exhaust of the engine while pouring the coolant in the overflow container. I can see a clear path for coolant to freely flow from the heater pipe/hose that is located near and above the exhaust outlet on vehicle with a rear heater.

Interesting thought. It’s gonna suck big time if the OP tore the engine apart for no reason. Regardless of the outcome this is a good example of why it’s important to do diagnostic work before leaping into solutions.

 

[bill1013]

Has anyone suggested Barr's Pellets for a quick fix for a head gasket leak? My 84 Bronco II (2.8L) started belching "steam" out the exhaust. Figured it was a blown head gasket. Put Barr's pellets in the radiator and it got me around 200 more miles. Which was enough to get me around to get another set of heads and the material to do the job myself. Got the heads from Headhunters out on Sand Island. Kimo told me he will see me again in around 20K miles. Seems the Ford 2.8L engine blows head gaskets on a frequent basis. That's due to the number 8 cylinder only has 1 port for coolant to pass through whereas all the other cylinders have 2. And the head gasket ALWAYS blows at the number 8 cylinder. One of the many design defects of the Ford 2.8L engine and the Bronco II. I could name a few more, but I have a feeling you've heard enough for now.

 

[Mudsport96]

Does the Tahoe have a rear heater? I cannot find a clear path for coolant to flow out the exhaust of the engine while pouring the coolant in the overflow container. I can see a clear path for coolant to freely flow from the heater pipe/hose that is located near and above the exhaust outlet on vehicle with a rear heater.

Im kinda wondering the same thing.
As someone who has had another vehicle with a massive coolant issue, pouring water in the radiator and having it come out the tail pipe takes a fairly large amount of water.
You have to fill the cylinder (if its a head gasket or craked head before the exhaust port or if the exhaust valve is open) then fill the cats, then fill the piping between the cat and muffler, then the muffler, then the over the axle bend. Then you will see coolant come out of the tailpipe.
On a 4.3 s10 blazer that is approximately 6 gallons

 

[rockola1971]

Im kinda wondering the same thing.
As someone who has had another vehicle with a massive coolant issue, pouring water in the radiator and having it come out the tail pipe takes a fairly large amount of water.
You have to fill the cylinder (if its a head gasket or craked head before the exhaust port or if the exhaust valve is open) then fill the cats, then fill the piping between the cat and muffler, then the muffler, then the over the axle bend. Then you will see coolant come out of the tailpipe.
On a 4.3 s10 blazer that is approximately 6 gallons

If a cylinder was full of coolant, the engine would not turn over. Liquid does not compress. Any liquid less than the full volume at TDC would just blow out of the exhaust valve on the exhaust stroke. Thats how exhaust is evacuated from a cylinder and it would do the same with a liquid. It is possible and has happened for some give in the full cylinder of liquid trying to compress. The pushrod(s) for that cylinder would bend. Engine would be hydrolocked if a substantial amount of liquid is in cylinder with valves closed. This results in the bent pushrods scenario and can even bend a connecting rod.

 

[Mudsport96]

Exactly, but if it is not running and a person is just dumping water in, you have the potential to end up filling the cylinder. That is what i was trying to get across.

 

[bill1013]

Also, fluid does compress although ever so little. At 10K PSI fluid compresses less than .010% of it's entirety. But for all intents and purposes...Fluid/water is not compressible.

 

[Erickk120]

360k miles pretty solid, still wont beat a dude that I know, I was shocked when I saw his dash. He has an express 3500 with 480k miles original motor, but on the 2nd trans. He said his secret was driving like an old lady, and religious maintenance of all fluids. I got a little jealous even my 7.3 powerstroke probably wont get that mileage the way I drive.

 

[Tonyrodz]

360k miles pretty solid, still wont beat a dude that I know, I was shocked when I saw his dash. He has an express 3500 with 480k miles original motor, but on the 2nd trans. He said his secret was driving like an old lady, and religious maintenance of all fluids. I got a little jealous even my 7.3 powerstroke probably wont get that mileage the way I drive.

Know which motor he has? 4.8 or 6.0?

 

[Erickk120]

Know which motor he has? 4.8 or 6.0?

6.0 still sounds nice, and doesnt appear to burn oil, atleast visible. I got to ask him if it does though. I know of another foreman that runs an 05 silverado 5.3 he got his rebuilt after 410k miles. His was worn as you could see smoke blue all the time, but little.