One of the most common factors why your car's starter isn't starting is due to overheating. Since it's near the engine, the heat radiating from the engine affects the starter solenoid, creating a "heat lock". The starter fails and your vehicle won't start. Installing a starter heat shield is a perfect solution to these problems. It will protect your car from the engine's heat and helps prolong the starter's life. Here are some tips on how to choose the right starter heat shield
Types of heat shields
Since internal combustion engines radiate large amounts of heat, it's important to protect the engine's components and bodywork from damage. Heat shields act as a barrier or insulator against heat. Knowing the types of heat shields can help you choose the right one for your vehicle:
Flexible--These heat shields are made from thin aluminum sheeting and are bent by hand when fitted. Some manufacturers also add ceramic to make it more durable and heat-resistant. High-performance heat shields are also used by Formula 1 teams for their race cars.
Rigid -- Before, solid steel was the material of choice for most manufacturers for its strength and rigidity. Nowadays, aluminum is the preferred material for rigid heat shields. Composites like ceramics are added to the aluminum sheets to improve the heat shield's insulation.
A high quality starter heat shield can effectively lower your engine bay and intake's temperature. Depending on the materials used, it should be able to minimize the transfer of radiant heat or stop it before it reaches the other engine parts. Fiberglass is commonly used because it can insulate continuous heat up 1000-degrees Fahrenheit. Add "Vermiculite" to the mix, and it can now withstand heat up to 1200-degrees Fahrenheit. Over 1200-degrees, fiberglass will melt, crystallize, and eventually fall apart. Basalt is another popular material used because it can withstand heat up to 1200-degrees Fahrenheit and it can stop more heat. Aluminized fiberglass can reflect 90% of the radiant heat if there is a good air gap and air flow within the engine bay.
Be a smart shopper
Always be careful when buying parts. There are a lot of unscrupulous sellers or manufacturers that will sell non-insulated gold heat shield barriers. It's just a piece of gold foil taped to a Mylar foil, so be careful. Also, aluminum melts at 1120-degrees Fahrenheit, do not be fooled when you see a 2000-degree aluminum heat shield wrap. Do some research and think before purchasing anything.