The revving of an engine has been something that is extremely close to the hearts of automotive enthusiasts. So it is normal to think about whether or not revving your car is damaging your vehicle. When you rev your engine, you are putting additional and unnecessary stress and pressure on your car. This is extremely important to know not to rev your engine especially when it is cold outside or if the engine has not warmed up. A cold engine rev can be extremely damaging to the car. A cold start means that the engine oil has not had sufficient time to circulate and it can not correctly lubricate your combustion chamber. So revving the engine car damages the internals of the engine.