does it matter what way the heater lines are connected to the fire wall on my 2002 dodge ram 1500
Jan 11, 2013 at 7:13 PM
CARADIODOC
✓Experienced Mechanic
34,403 POSTS
If you connect them backward it will suck the heat out and make you cold! Okay, not really. There's no check valve or anything like that so if both tubes are the same diameter you shouldn't notice any difference in performance.