Join Date: Feb 2010
Location: Thompson Falls, Montana
Feedback: 0 reviews
Older Jeeps had a drain tube that drained excess water out of the hvac box.Anything that gets into the hvac intake vent on the cowl goes through the heater box. Sticks/leaves/mud and plug the drain and water would stagnate in the heater box.
I assume the JK's have a similar drain. I bet yours is plugged with gunk.
I tried to find an image of it but could not. It should be a hose hanging down from the firewall on the passenger side of the engine somewhere, with a weird looking flat nozzle on it. I'm pretty sure it's the only one that does not run to anything. Clean it out, flush it with a hose and run water though from the cowl to make sure it's clean and draining, and you should be good.
'76 CJ-7, '43 CJ-2a, '78 Bronco,'78 CJ-7, '75 CJ-5, '78 CJ-7, '80 CJ-7, '78 SJ, '79 SJ, '78 and a '76 FJ-40 , '90 XJ, '91 XJ, '86 CJ-7, '95 ZJ, '68 CJ-101 Commando, '00 TJ, '68 M-715, 2 '86 Military Blazers, '96 LR Discovery, '86 CJ-7, '91 YJ, '99 TJ, 07' JKU Rubi, 1988 YJ, 1973 Commando, 3 Diesel Excursions....
Now back to a 2013 JKU Rubicon with "stuff", planning 37's with minimal lift.
I've tried them all... Jeeps are still the best. (0||||0)