Seeking WOTL for this 2000 Dodge Caravan Base 3.0 V6 coolant leak.
Last night, overheating returned. Ding - alarm sounded once, then again, temp gauge almost at H. Moments later, Ding-Ding-Ding & on & on, gauge on H and the temp red dash light came on. Immediately pulled over. Was able to add 3/4 gal coolant to the dry reservoir tank and drive home. To help cool, I set the heater on full and heat very much came thru the vents. The temp gauge dropped one notch. And as the drive continued, the gauge would drop to the midpoint, then up almost at H, then back to midpoint. Made it home.
Am guessing that the coolant in the reservoir did not make it back into the engine. Today I added almost a gallon directly into the radiator. Ran a 10 mile r/t errand, then, over cardboard, ran the engine at idle. Coolant was fast-drip (1/sec) leaking and I could see it dripping off the rear side of the oil pan. I need more room to get under safely to see what’s what. The reservoir level didn’t seem to change at all. After 45 minutes letting it cool, the reservoir dropped 2/3 between max toward min.
In April this year 2019, there was a ‘mysterious’ leak - I think it was the same issue, very similar gauge activity - and I saw coolant leak where the fluid dripping near the rear of the engine. My shop said after some time running under pressure test that the problem was the cap and they replaced it. That was almost 1K miles ago, about my usual mileage.
In the 1 1/2 months between, I have had no noticeable problems. I’ve read that there is a rear coolant (inner?) metal tube that others have patched with a rubber tube, I wonder how difficult it is to replace if that’s the leak.
FYI: I reported a non-overheating condition a couple of years ago, here: 2000 Caravan NOT Overheating?
Also - I don’t want to throw my mechanic under the bus - but am wondering why I saw coolant leaking in April and his pressure test did not show a leak, now I’m seeing a similar coolant leak - both times without pressurizing - am thinking about going somewhere else.
Apologies to length but I do have some history and detail that might make sense to you. Help!