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.
If you notice a gassy odor when using your propane heater or other appliance, it may be because you're running out of gas. Don't let the supply become completely exhausted as an empty gas tank can cause a serious explosion. If the gas supply feeding the propane heater has run out, immediately turn it off as well as the valve at the gas tank.