Utilizing the correct compound can be an excellent way to prevent seizing, galling, and corrosion in areas that are regularly exposed to high temperatures. Nickel Anti-seize: Copper-free. Recommended for stainless steel and other metals.Copper-based anti-seize: Fortified with copper and graphite in a grease.Inert and will not evaporate or harden in extreme cold or heat. Silver Grade Anti-seize: Fortified with graphite and metallic flake.Some anti-seize formulas will simply evaporate once the exhaust reaches these peak temperatures. Different formulas are engineered to withstand different temperature levels. The exhaust can reach 1,000 - 1,200 degrees under a heavy load and even higher on integrated turbochargers and at high throttle. On average, an exhaust manifold on gas and diesel engines will reach temperatures as high as 800 - 900 degrees under a medium load. These marine-based formulas unfortunately do not have a high heat tolerance, so in areas such as exhaust manifold studs or turbocharger mounts, they would be very ineffective.Īnother factor to consider is the temperature the exhaust manifold is exposed to. However, it is important to note that these additives will react harshly with moisture and wreak havoc – so avoid using them on marine engines at all costs! There are marine formulas of anti-seize that will have a rubber-cement type viscosity which are crafted to prevent the corrosive effects of water and metal interaction. These formulas work great in high temperatures with copper and graphite combined with high-quality grease, for example, on hot engine fasteners and bolts. For example, automotive formulas may contain aluminum, copper and graphite which are combined with grease. The first thing to understand is that there are numerous products on the market.Įach of these products has a special use and application. We’re going to break down the pros and cons of using compounds and grease like anti-seize on your bolts and studs between repairs or maintenance.
One question that is frequently debated by automotive technicians is, “do you put anti-seize on exhaust manifold bolts before putting them back into the engine head?”
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