Ninth Street Truckie
Join Date: Apr 2011
Location: Ewing, NJ
Vehicle: 2003 Dodge Durango SXT
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Finicky cooling system *SOLVED*
So, hopefully you guys can give me a hand with a cooling system issue. Well, maybe not an issue, but more of a concern.
I just got this truck a couple months ago Ė love it. Itís a 2003 Durango 4.7 SXT with no rear heater and just under 55k on it. I like to change my coolant in the spring and fall so I can do my 30/70 mix and 50/50 mix respectively. So, after work yesterday I picked up a gallon of G-05, a bottle of water wetter (first time trying it out), and a bunch of distilled water. Here is the procedure I followed for my 30/70 mix, tell me if you find any problems:
1) Wait for truck to cool
2) Open Radiator cap and reserve tank cap
3) Open radiator drain valve and siphon out reserve tank
4) Fill cap and reserve with 100% distilled water
5) Run truck with heater on for 15 minutes, cap off to get rid of air
6) Shut off, wait for truck to cool
7) Open radiator cap and reserve tank cap
8) Open radiator drain valve and siphon out reserve tank
9) Fill cap with 1 gallon of straight antifreeze and water wetter
10) Top off with distilled water
11) Fill reserve tank with distilled water
12) Run truck with heater on for 15 minutes, cap off to get rid of air
13) Seal everything up. Check for leaks. Shut off truck. All done.
Now, Iíll point out a couple observations. First of all, when filling the system back up, I was shocked when the cap only took about 1.5 gallons of fluid. I guess thatís because the drain valve doesnít get all the water out (some still stuck in the block?) Also, while observing the coolant level with the cap off and the heater not running, fluid was actually coming OUT of the cap (slow trickle) instead of going down. With my other cars, I usually have to stand there and top off the system when itís running.
Okay, so the next morning (today) I walk out to the driveway. Being the good car owner I am, I check the coolant level before I start the motor. I open the radiator cap, and nothings there Ė which is expected due to thermal expansion/contraction. So, I get my distilled water for a top off, and the system takes a half gallon. Whoa, thatís a lot for a top off! I check the reserve tank and itís a bit above full. Whatever, weíll see what happens. I start her up and drive 35 highway miles to work. Temp holds at 200-205 (needle at the 10:30 or 11:00) for the whole trip with an ambient temp of about 67. Great!
Now, I park the truck and get out and there is a good leak. Thankfully, itís coming out of the cap as if I overfilled the system Ė but I donít see how thatís possible. Iím new to this truck, and itís large (3.5 gallon) cooling system, so if anyone has any insight on whatís happening, if Iím doing something wrong, and how to fix it, I would really appreciate it.
Sorry for being so wordy, I just want to convey every detail so you guys know whatís going on.
2003 Durango SXT 4.7 V8 | 75,000 mi
Last edited by Axeman; 05-07-2011 at 12:57 AM.
Reason: Problem solved