Nope, not that I've ever heard of, even with solid box restrictive bumpers and skid plates the FJ seems to run just fine. The only time I've heard ov an overheating situation was someone who buried their rig in mud and clogged up the radiator fins. Just needed a good power wash.
1. The radiator is huge and is so tall that it needs its own separate frame crossmember at the bottom to hold it up.
2. As with most radiators, it's the fan drawing air through it that does most of the cooling, as opposed to air coming in the front. I am pretty sure you could completely block off the front and you'd still be fine.
Thanks for the replies. Forgot about the fan doing it's job.
Overheating wont be a problem this weekend in the Pacific Northwest because it's supposed to be colder here than in Anchorage.(Global Warming?):lol: