Will a broken engine hood insulation cotton cause spontaneous combustion?
2 Answers
Engine hood insulation cotton will not cause spontaneous combustion if broken. This is because the engine hood soundproofing cotton contains certain flame-retardant materials, featuring characteristics such as high-temperature resistance, difficulty in burning, and low thermal conductivity. Extended knowledge about insulation cotton: 1. Function: The functions of insulation cotton include soundproofing, heat insulation, vibration prevention, and protection against paint discoloration due to high temperatures. It also prevents the hood paint from turning yellow or discoloring due to prolonged exposure to high temperatures, avoiding color differences between the hood and fenders. 2. Disadvantages: While insulation cotton does not affect the engine's heat dissipation, it can increase the load pressure on the overall heat dissipation system. 3. Classification: Insulation cotton is categorized by temperature resistance into high-temperature resistant insulation cotton and low-temperature insulation cotton.
I've been repairing cars for almost ten years, and people often ask me if a broken engine hood insulation pad can cause spontaneous combustion. Actually, its main function is to isolate the heat from the engine and protect the hood's paint. Most of these materials are flame-retardant and won't easily catch fire. However, two scenarios require attention: first, if the damaged part happens to touch high-temperature components like the exhaust pipe or turbocharger; second, if it gets soaked with engine oil or gasoline from leaks. The combination of these two situations is dangerous. I once saw an old BMW start smoking because oil leaked from a fuel line onto a damaged insulation pad. So, if you notice any damage, it's best to replace it as soon as possible. Regularly checking the fuel system and cleaning oil stains in the engine bay can significantly reduce the risk.
