I noticed that 172 cups do not have the plastic engine covers that my 182 sport has and my friends 172 sport has! I asked Renault if I could remove it and they said yes as mine rattles under load! I assume that you remove the four black bolts that appear to hold it to the engine? I tried to remove these and I could not even get one of them to budge a mm! Am I doing the right thing and is it okay to actuallt remove the cover from the 182?