Wondering which way the coolant flows into the heater cor...

Wondering which way the coolant flows into the heater core and from the water pump 2007 Dodge [Ram 1500](/topics-ram-1500/) Mechanic's Assistant: Has the vehicle ever overheated? And when was it last serviced? No and I do...

Wondering which way the coolant flows into the heater core and from the water pump 2007 Dodge [Ram 1500](/topics-ram-1500/) Mechanic's Assistant: Has the vehicle ever overheated? And when was it last serviced? No and I do the work myself Mechanic's Assistant: Are you fixing your Ram 1500 yourself? What have you tried so far? Yes and nothing it’s a simple question

Automotive Expert
Howdy from Tennessee, I'm Chris aka Moose. Who am I helping today? I'm glad you've come here to get help. I will do my best to get the answer you are looking for. I help many customers, so sometimes my replies are delayed, I will respond once available. I try to be online at 1-5 pm and 10 pm-5 am every day. What liter engine do you have?

I have a 5.7 hemi
Automotive Expert
Here is that coolant flow diagram [https://www.dropbox.com/s/vfbfgescn9htf4q/57coolantflow.pdf?dl=0](https://www.dropbox.com/s/vfbfgescn9htf4q/57coolantflow.pdf?dl=0) Thank you for seeking us for help, I hope I provided what was needed. Press reply if you need to follow up. If you liked my answer please let me know so I can mark your question complete. Moose

On the 5.7 it does not show me at all where the hoses go
Automotive Expert
There is not a diagram showing the coolant flow with the hoses attached to the engine. The only one is the diagram I sent showing the flow at the pipes on the engine. You would have to follow the hoses connected to those pipes to see the in/out at the heater core. In the diagram, those are connections 8 and 9

That engine is the 4.7It would be perfect if that showed the 5.7 hemi but that shows the 4.7If you scroll down on what you sent me it shows the 5.7 with pretty much nothing
Automotive Expert
I just noticed that I was looking at the wrong engine, my bad, sit tight.

Thank you

Hello are you still connected
Automotive Expert
I can not find a diagram anywhere like there is for the smaller engines. If you must know what hose at the heater core is the inlet or outlet. You can remove one hose and route it to a bucket and attach another hose to the heater core ran to a bucket. Start the engine. If the coolant comes from the heater core side then that is the return. If it comes from the engine side, that is the supply side.

I actually have both hoses out right now and I forgot to mark themI’m trying to understand which hose goes where
Automotive Expert
Where they connect on the heater core does not matter. It heats the same regardless of the flow direction.

It doesn’t matter even though there is a inlet side and a outlet side?
Automotive Expert
The heater core works the exact same way in both directions.

Okay on my water pump does it pump the coolant through the sliver/metal tube or the metal black bypass tube
Automotive Expert
The heater core supply is right before the coolant exits the engine at the thermostat. The heater core return goes to the water pump.

Both of these tubes go back into the water pump

That black tube right there. Is that the inlet tube or the outlet
Automotive Expert

that sends the coolant to the heater corethe other connection is it going back into the water pump
Automotive Expert
That is correct.

it doesn’t matter which way the heater core goes?
Automotive Expert
That is also correct.

Do you have a preferred way or know if the top plug or bottom plug is top or bottom
Automotive Expert
I try to connect the input to the top pipe since that kind of helps with gravity but many cars' heater core pipes are side by side.

the input is that black pipe?
Automotive Expert
Are you referring to the engine or the heater core. Dodge has nothing in the drawings stating the color of the pipes.

If you look up in the conversation we sent photos
Automotive Expert
I returned a picture and drew arrows on it showing the coolant flow.

is that considered the inlet

Or the outlet
Automotive Expert
That is the heater core inlet, it is pushing coolant from the engine to the heater core.

Okay sorry for the confusing this is new to me. So if I got this right from that black pipe I should put the hose on the top and then the other hose Connect it to the bottom and the silver part of the water pump
Automotive Expert
That is correct

Okay thank you for all of your help tonight
Automotive Expert
Glad to help.

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