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SVT Shelby GT500
Liquid Cooled Kenne Bell Lines through the Engine Coolant System
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<blockquote data-quote="Bad Company" data-source="post: 15669537" data-attributes="member: 141815"><p>Robert</p><p></p><p>Flow is established by the pressure differential in the system. The way this system is plumbed you have a pressure differential caused by the thermostat. This is the restriction after the water pump in the engine and the coolant reservoir where you're returning the water from the degas hoses at the front coolant towers of the manifold. People don't realize that the pump will actually have a higher pressure outflow than the coolant system static pressure. So you either have a pump that isn't establishing a high pressure differential or you have a restriction of water flow of the LC hoses to the SC. The LC hose size is more than adequate to have a volume of flow. Could you possibly left a piece of paper towel in a fitting? The other thing is the water pump moving the water throughout the whole cooling system correctly? I can't remember if the 13/14 have a different pump than the earlier years or if there was a change in the aluminum blocks to enhance the cooling system flow. I do remember something being different though. If you wanted to test the water pump's output pressure you can actually install a temporary pressure gauge on your LC return line to watch how the pump is functioning. You'll have to do this without returning coolant to the system at the gauge. Take the hose off the reservoir, cap the tank off where the hose is installed and install the gauge in the end of the hose. Let the engine warm up to establish flow through the rest of the cooling system and then monitor your gauge throughout the engine RPM range to see how high above the cap pressure it goes to establish flow through this line. If pressure doesn't increase pressure above cap pressure than you don't have a good flow off of the pump or you have a restriction somewhere not allowing the pressure to increase on this system.</p><p></p><p>Also what you see at a slow idle of the engine versus what you'll see at higher engine RPM will be different due to the water pumps faster RPM. I've seen water pump impellers start to spin on the shaft as engine RPM increases on the big Cat engines causing issues. Measuring pump pressure output is the only way to find it without taking the water pump off the engine.</p></blockquote><p></p>
[QUOTE="Bad Company, post: 15669537, member: 141815"] Robert Flow is established by the pressure differential in the system. The way this system is plumbed you have a pressure differential caused by the thermostat. This is the restriction after the water pump in the engine and the coolant reservoir where you're returning the water from the degas hoses at the front coolant towers of the manifold. People don't realize that the pump will actually have a higher pressure outflow than the coolant system static pressure. So you either have a pump that isn't establishing a high pressure differential or you have a restriction of water flow of the LC hoses to the SC. The LC hose size is more than adequate to have a volume of flow. Could you possibly left a piece of paper towel in a fitting? The other thing is the water pump moving the water throughout the whole cooling system correctly? I can't remember if the 13/14 have a different pump than the earlier years or if there was a change in the aluminum blocks to enhance the cooling system flow. I do remember something being different though. If you wanted to test the water pump's output pressure you can actually install a temporary pressure gauge on your LC return line to watch how the pump is functioning. You'll have to do this without returning coolant to the system at the gauge. Take the hose off the reservoir, cap the tank off where the hose is installed and install the gauge in the end of the hose. Let the engine warm up to establish flow through the rest of the cooling system and then monitor your gauge throughout the engine RPM range to see how high above the cap pressure it goes to establish flow through this line. If pressure doesn't increase pressure above cap pressure than you don't have a good flow off of the pump or you have a restriction somewhere not allowing the pressure to increase on this system. Also what you see at a slow idle of the engine versus what you'll see at higher engine RPM will be different due to the water pumps faster RPM. I've seen water pump impellers start to spin on the shaft as engine RPM increases on the big Cat engines causing issues. Measuring pump pressure output is the only way to find it without taking the water pump off the engine. [/QUOTE]
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Liquid Cooled Kenne Bell Lines through the Engine Coolant System
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