Auxillary Heater Hose Connections May Develop Coolant Leaks on Dodge Grand Caravan

The auxiliary heater hose connections (that are routed to the rear heater under the vehicle) can develop coolant leaks.

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Average mileage: 100,110 (41,000–191,000)
10 model years affected: 1996, 1997, 1998, 1999, more2000, 2002, 2008, 2009, 2010, 2013
41 people reported this problem
24 people shared problem details
had coolant leak to aux heater. tracked it down to a leaky y connection directly behind the coil pack. Dealer wanted $190 for a replacement assy. Told me it can't be repaired. What I did was remove the plastic Y. and install a T fitting. On one end it goes to motor. other end I put one heater hose. I then used a small piece of heater hose to attach a 90 degree elbow to the open part of the T. This I connected to the other heater hose. Total cost. $27 including antifreeze and clamps. I bought a foot of heater hose but only used about half of it. No leaks and looks like it belongs there since my hoses aren't twisted at any weird angles. Total materials list. 1 T, 1 Elbow. 6 inches heater hose, 6 clamps and a gallon of antifreeze. No need to remove hoses from metal tubes at firewall either. Total repair time about 15 min.
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heater core 'Y' connector leaking from seam in main piece. Smelled hot antifreeze but could find no leak at first. Finally tracked it down with car running watching the anti freeze spew out of the little pinhole! Dealers will not/cannot sell just the Y, comes as a unit with hoses/tubing etc. Installed about $350.00 Just replaced the Y with brass T and 24" of 5/8 heater hose and 3 regular hose clamps. About $19.00.
Top of Y fitting split open and was spraying coolant every time gas pedal was pressed. Was discovered by horrible odor and smoke/steam eminiating from under hood while driving. Was dropped at dealer as emergency repair & repaired under extendand warranty - total repair would have been $186. Car would have been undrivable though.
rear heat and return line v-shape connector under the hood against the fire wall, had developed a leak as the v-connector (made out of a nylon type material) cracked. I replaced it once already, and it now had developed another leak in the same location, so I am attempting to replace it yet again.
metal hose is rusted and leaking all coolant
Leaking Anti freeze and we do not see where it is coming from; therefore it may be the under body hose. Getting it checked.
Antifreeze loss, intermittent heat.
Replaced the Y joint
Auxillary heater hose conenctiosn my develop coolant leaks
Car overheated on the highway got it home safely buy adding water don't forget you gotta keep your engine cool. When i got home I added more water and started the van and noticed that leak was spraying up from the y connector.I have a back ground in Ag so i went to my local True Value and got a 5/8 Banjo T hose barb 5 hose clamps and 18 in of 5/8 heater hose( was a little much but i like to have extra). I removed the clamps from 2 of the location dont worry about the one going to the firewall just cut it off as close to the Y as possible. Ran new hose from the block to the Banjo T and to the left heater line and hooked up the heater hose coming from the firewall took 15 min or so and cost me 12 dollars
Dodge journey part is on major back order
I had a leak in the line under the passenger front door. I used a hacksaw blade to cut the rotted line just in front of the were the line is mounted to the frame. I cut 1 line 2" shorter than the other. Then I removed the 2 rubber flex lines and installed 2 new rubber flex lines with new hose clamps. Problem solved.
Didn't just leak, it split and blew coolant all over the engine compartment. ~$350 to fix by replacing the entire assembly.
steel piping going to rear heater
Same issue with Y connector. Took van in for other issues that are covered by the lifetime warranty on the drivetrain and mechanic at the Dodge dealership found the Y connector problem that was making the heater hose swell.
Split in the Y From the Front to Raer Heater
antifreeze leaks from heater hose onto engine causing smoke and stinky smell. keep having to add antifreeze until found out by looking while heater is on and saw a stream of liquid (antifreeze) squirting onto engine area. looking for a solution and anticipate cost to fix problem
When the van runs a while the coolant leaks out and steam and that smell comes from the hood. When I stop for a while it stops.
tube underneath the van behind the front wheel just in front of rubber hose just before tubing goes up to the engine has a pinhole leak. Cut tubing back and cut tubing off metal bracket. Installed new longer rubber hose and zip tied hose to bracket
2010 Grand Caravan. Approx 63,000 miles. The same Y connection near the manifold has sprung a leak. The seam now has a hole. To repair it, as many others have done, I spliced the two hoses feeding out of the Y connectors, replaced the Y connector with Oreilly Auto's part 84757. Purchased a 5/8 inch heater hose to connect from the back of the engine to the Y connector. It's all fixed for now, but I may go to Lowe's and get the metal T part number APXT34 as shown in
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