No amount of bleeding is fixing the water fall sound coming from the heater core.
#11
You can pressurize the system which will tell you if you have an issue. Local parts stores will loan you the tools.
I have an extreme hill behind my yard that leads into the river. I park on that hill when I bleed my truck. Its quick, no issues.
Putting the truck on jack stands is not high enough imo.
Find a hill, park it front up.
Let it idle. Turn the heat on. Watch the gauge. You can do things like step on the gas, squeeze the hoses which will help flow.
If you really need insurance, put your stat in a pot of water and verify it is opening.
Borrow or buy a motor scope which is a small camera that you can feed into your radiator or heater core to see what the internal condition is. It will help you determine if its clogged.
Use super flush.
Use garden hose, back flush.
Read your spark plugs, smell your spark plugs. Stick the microscope in the combustion chamber and see what it looks like in there...
What temp does it go to when it idles?
#14
I’m all out of ideas. I’ve bled and bled and bled, on uphill slopes and level ground. Some days this week the water fall noise was gone, other days like today it comes back. Temps are between 188 and 196. The only cooling system component I haven’t replaced in the last couple weeks is the water pump. Is there any way this could be a cause? It’s very audibly confirmed to be at least pushing coolant around.
#16
#17
Yep, it's still installed. All that to say, I'm going to do a pressure test and maybe even make a little write-up for it. The test should identify that as a leak, yeah?
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