heater
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Joined: Jan 2006
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RE: heater
This was posted by miller on another forum:
"Message:
Had the same problem on my 1999 3.9. All I did was following the instructions posted on this site to flush the heater core and my heat returned. This is a very simple problem to fix and doesn't take that long.
Hope this helps.
Below is a copy of what I pulled off other posts:
Here is an answer to the original question about the posters heater core. It is plugged. I had the same exact problem. I had flushed out my coolant system several times, but still no real heat coming from the heater. I then finally thought about it and realized the the convential way of flushing out a coolant system does not really flush out the heater core. The problem is that when you flush the coolant system out you normally connect the flushing water to the inlet side of the heater core hose and then backflush the system out through the radiator cap. This works fine for the engine and the radiator, but does not backflush the heater core. But for less than 99 cents and about 15 minutes you can easily backflush your heater core yourself.
1. What you have to do is get a 5/8 inch female garden hose adapter. This can be purchased at just about any hardware store. Make sure it is the kind that slips inside the garden hose.
2. Then with the engine cool you need to disconnect the outlet hose of the heater core from the engine. You need to do this at the water pump connection, which should be on the driver's side of the engine. Then insert the garden hose adapter into the end of the hose.
3. Then disconnect the heater core inlet hose from the engine connection. On my Dakota this is easily done at the splice that is on the passengers side of the engine. This splice is where you normally connect to flush out the coolant system.
4. Then hook a garden hose up to the outlet hose and turn on the water. Have someone help you turn on and off the water as you flush out the heater core.
5. You will probably have to flush the core for a good 5 minutes to fully clean it out. Then reconnect your heater hoses as they were and enjoy the heat.
Try and collect atleast the first 2 gallons of stuff you flush out and dispose of this according to your local laws. After the first 2 gallons all you should get out of your heater core is dirty water. This should be ok to just dump on the ground but make sure first.
And yes -- top outlet from heater core goes to engine, bottom outlet to water pump -- at least on my '96 3.9 liter.
I used to install a Prestone Flush-n-Fill kit on everything I drove. I got away from that philosophy, and as a result I darn near froze! If you install a kit, do it in the line that goes from the pump to the heater. Then, just clamp the heater hose between the fill connector and the pump to force the water back through the heater, through the engine, and into the bottom of the radiator, and down the drain. "
"Message:
Had the same problem on my 1999 3.9. All I did was following the instructions posted on this site to flush the heater core and my heat returned. This is a very simple problem to fix and doesn't take that long.
Hope this helps.
Below is a copy of what I pulled off other posts:
Here is an answer to the original question about the posters heater core. It is plugged. I had the same exact problem. I had flushed out my coolant system several times, but still no real heat coming from the heater. I then finally thought about it and realized the the convential way of flushing out a coolant system does not really flush out the heater core. The problem is that when you flush the coolant system out you normally connect the flushing water to the inlet side of the heater core hose and then backflush the system out through the radiator cap. This works fine for the engine and the radiator, but does not backflush the heater core. But for less than 99 cents and about 15 minutes you can easily backflush your heater core yourself.
1. What you have to do is get a 5/8 inch female garden hose adapter. This can be purchased at just about any hardware store. Make sure it is the kind that slips inside the garden hose.
2. Then with the engine cool you need to disconnect the outlet hose of the heater core from the engine. You need to do this at the water pump connection, which should be on the driver's side of the engine. Then insert the garden hose adapter into the end of the hose.
3. Then disconnect the heater core inlet hose from the engine connection. On my Dakota this is easily done at the splice that is on the passengers side of the engine. This splice is where you normally connect to flush out the coolant system.
4. Then hook a garden hose up to the outlet hose and turn on the water. Have someone help you turn on and off the water as you flush out the heater core.
5. You will probably have to flush the core for a good 5 minutes to fully clean it out. Then reconnect your heater hoses as they were and enjoy the heat.
Try and collect atleast the first 2 gallons of stuff you flush out and dispose of this according to your local laws. After the first 2 gallons all you should get out of your heater core is dirty water. This should be ok to just dump on the ground but make sure first.
And yes -- top outlet from heater core goes to engine, bottom outlet to water pump -- at least on my '96 3.9 liter.
I used to install a Prestone Flush-n-Fill kit on everything I drove. I got away from that philosophy, and as a result I darn near froze! If you install a kit, do it in the line that goes from the pump to the heater. Then, just clamp the heater hose between the fill connector and the pump to force the water back through the heater, through the engine, and into the bottom of the radiator, and down the drain. "
RE: heater
I actually just did this tutorial yesterday. Follow the link below.
https://dodgeforum.com/m_640588/tm.htm
https://dodgeforum.com/m_640588/tm.htm