that is ot how you test for a cooling fan problem and you should take it to your mechanic so you dont chop off any fingers. Those fans are on a special switch that comes on when the engine reaches a specific temprature. Paul, 38 years ago there was only one fan. Now, a lot of cars actually have two fans.
2) Propane contains an odorant similar to what's put into natural gas. If combustion is not complete, or there are any leaks, then this odorant produces a smell. In addition, in larger tanks typically there is a large tablet of solid odorant sitting in the bottom of the tank.
NOTE: Some people believe that the smell of propane gas is a signal that their tank is nearly empty and should be refilled. When a tank is low you may get a momentary whiff of gassy smell when burners are ignited. However, if the smell of gas odor continues, you may have a serious propane gas leak.