What could be causing it?
Here's some pics





Any help would be appericated, thanks.

 

looks like rear heater lines? since you didnt give us any info about your rig, i would assume that it is a 4runner and has rear heat? if so then bypass the heater.

 

Yah you are correct (4runner, rear heat) sorry about the lack of info, whats involved with bypassing the rear heater? I just got this truck two weeks ago so I really dont know my way around it yet, it's a bit different than my civic. Thanks for your reply, i was suspecting that it was the rear heater seeing how its middle ways back on the truck, but i'm not sure exactly how one would go about bypassing it. Any help? thanks in advance.

edit** also, you wouldnt have to assume anything by looking at the start of my vin# in my sig. but I dont expect many to notice that, so yah ill explain myself better next time.

 

One line goes in... one line goes out... just need to beat the lines to the heater and the leak.

You can usually trace the lines and follow them up from the tranny tunnel in the engine compartment. You'll be able to see where they hook into the rest of the cooling system and either cap them off or loop them.

I thinking capping would make better sense.

All this will let you put a different center unit in with more storage, and that will be sweet.

 

Good posting. More storage is always better!!!

 

thanks for the replies, looks like ill be fixing this tommorrow, im going through coolant like crazy right now.

 

Looks like a rear heater line leak to me for sure. The lines that go to the rear heater are on the right side of the firewall by the MC or mine were. You can trace them from the rear heater easily. Just remove it all. All you gotta do is just remove them and bypass them with some heater hose in the engine bay. Nothing to it. I took out all my HVAC...thus I guess I bypassed it all! :hillbill

 

Hey guys, sorry to butt in, but I have the exact same issue. It's not leaking that bad, I never see drips, but I have seen a bit of wetness on one of the lines that goes into the firewall which someone identified as a heater core line. I want to have heat but I don't want to fix a leaky heater core right now. So there's just two lines into/out of the heater core? Can I just pinch these with something for a while, without detriment? What is meant by "capping them off"?

 

You can't just pinch off the coolant lines wherever...you want a looped system and you don't want to take the engine out of the loop.