Yesterday our 93 Previa had what looks to be engine coolant dripping out of the A/C condensation drip tube (the tube that hangs down underneath the vehicle and drains what should only be condensation/water from running the A/C). I had checked the engine coolant level 1.5 weeks ago and everything checked out, but then yesterday my wife noticed something amiss dribbling from the A/C condensation drip tube. We took it to an Xpress lube place and the tech there said it was engine coolant, based on the taste and appearance. The engine coolant level had definitely dropped during that time yesterday, so I'm almost 100% convinced it's engine coolant coming out based on the taste/appearance/lowering of the engine coolant level. Thankfully the engine temp never went up, as my wife caught it in time!!!
From my limited knowledge, the only way engine coolant is going to be coming out of the A/C condensation drip tube is either a bad (leaking) heater core, or maybe some valve that's stuck open?? I can't figure out where engine coolant would come in touch with the A/C condensation drip tube???
We have it at a mechanic right now to diagnose it, but after doing some research on this site I couldn't find anyone having an issue with coolant coming out of the A/C condensation drip tube.
Tim, I found your very helpful Previa heater core replacement 'cheater' version (see: http://www.toyotavantech.com/forum/s...-a-heater-core ), but I'm still not 100% convinced it's the heater core. I don't want to replace it if it doesn't need to be replaced!
Any ideas?
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