I have been driving without my rear window for a while now, since it has gotten cold really. I like to leave it out because it feels very nice, not too cold and not too hot etc. Now my grandpa says I should put the window in because he says the exhaust fumes get sucked in while driving. I do not believe this but I figured I may as well ask here just so I can make sure.
I've also heard this, in fact I believe they even mention it in the manual, but I do it anyway during the summer when thunderstorms tend to pop up without warning and I don't want to get caught completely topless. I've never smelled fumes or developed headaches or anything. Maybe I have an unusual tolerance for carbon monoxide.
They used to be really hot on the topic of not leaving the rear window down in the old station wagons and early SUV's because of carbon monoxide poisoning. I leave my rear window rolled up on my soft top alot, but then I have half doors and no uppers when I'm doing it. I wouldn't think it would be a problem as long as your side door windows were down providing air flow, but I don't think I would if the rest of the Jeep was closed.
It states in the manual to not have the back window open without the back sides, and maybe the windows, too, (that I don't remember) open because of CO poisoning. So now you know. Whatever happens next is to be expected. Good luck.
In God we trust.
All others bring data.
I had mine up this week and definitely had fumes in the cab. The problem is the vehicle creates an eddy effect much like a large rock in a river, where the water flows upstream behind it. The fumes have no where to exit the vehicle
I ride with the top up but back window rolled up all the time, both with and without the back windows in (oddly enough my Jeep didn't come with an owners manual so I never read about the CO risk until now).
I even rode from NC to PA, then home again, in this configuration, about 13 hours each way, and didn't seen to suffer any CO poisoning ill effects at the conclusion of the trip; in fact, I felt far better after completing the trip in the Jeep than I ever did with my previous truck (a Mazda B3000].
Not dismissing the potential risk, but just sharing my personal experience.
That's why they used to put the little spoiler on the back of the old station wagons.
That was supposed to direct the fumes away from the open window. Whether it worked or not I have no idea. I had an 81 Bronco and I always rolled the back window down but I usually had the front windows open as well. When i didn't I could smell the exhaust.
I've never done it on the jeep. If the rear window is open the side windows are off also.
Yes, Carbon Monoxide is odorless, but the rest of your emissions are not...
I'm 51, and through the years have driven all sorts of vehicles without the rear window and others with holes in the floor and exhaust leaks so bad it hurt your eyes. You'll feel the effects of other exhaust gasses long before CO becomes a danger. If you don't smell too much exhaust and your eyes don't hurt, you're fine... I'm driving w/o a rear window right now (because I don't have one)