Finding the Best Exhaust Header Bolts to Meet Your Car's Needs
How to Choose Exhaust Header Bolts
Introduction
Exhaust header bolts are an important component of any exhaust system, as they are responsible for securing the headers to the engine. Choosing the right bolts is crucial for ensuring that your exhaust system functions properly and lasts for a long time. In this article, we will discuss some important factors to consider when selecting exhaust header bolts.
Material
One of the most important things to consider when choosing exhaust header bolts is the material they are made from. The most common materials used for exhaust header bolts are steel and stainless steel. Steel bolts are strong and durable, but they can rust over time, which can cause them to become loose or break. Stainless steel bolts, on the other hand, are resistant to rust and corrosion, making them a better choice for long-term use.
Size
Exhaust header bolts come in a variety of sizes, so it's important to choose the right size for your engine. If the bolts are too small, they may not be able to handle the stress of the exhaust system and could break or come loose. If the bolts are too large, they may not fit properly and could cause leaks or other problems. To ensure that you choose the right size, refer to your engine's specifications or consult a mechanic.
Thread Type
Another important factor to consider when choosing exhaust header bolts is the thread type. The most common thread types for exhaust header bolts are coarse and fine. Coarse threads are stronger and more resistant to stripping, but they are also more difficult to install. Fine threads, on the other hand, are easier to install but may not be as strong. To determine the best thread type for your engine, refer to your engine's specifications or consult a mechanic.
Head Style
Exhaust header bolts are available with a variety of head styles, including hex, flange, and button. The head style you choose will depend on the design of your engine and the type of wrench you have available. Hex head bolts are the most common and are compatible with most wrenches. Flange head bolts have a wider surface area, which can provide better support for the headers. Button head bolts have a low profile, which can be useful in tight spaces.
Brand
When choosing exhaust header bolts, it's important to consider the brand. Not all brands are created equal, and some may offer higher quality bolts than others. Look for brands that have a good reputation and a proven track record of providing durable and reliable bolts. You can also read reviews from other customers to get an idea of the quality of the bolts from different brands.
Conclusion
In conclusion, choosing the right exhaust header bolts is crucial for ensuring that your exhaust system functions properly and lasts for a long time. When selecting exhaust header bolts, consider the material, size, thread type, head style, and brand to find the best option for your engine. By taking the time to research and compare different options, you can find the right exhaust header bolts to keep your engine running smoothly.
Frequently Asked Questions (FAQs)
1. What bolts should I use for exhaust?
For exhaust flanges, the usual options are 3 bolt or 2 bolt types. A recommended choice is an m10 bolt for 2 bolt flanges and an m8 bolt for 3 bolt flanges. It is important to use bolts with a grade of 8.8 tensile or higher to ensure they can be tightened without stretching or breaking.
The length of header bolts depends on the thickness of the flanges. Headers with 1/4-inch or 5/16-inch thick flanges typically use bolts with a 3/4-inch UHL (under head length), while 3/8-inch thick flanges usually require bolts with a 1-inch UHL.
The size of header bolts is 3/8-16 x 1 inch. This set usually comes with 12 bolts.
4. Can I use bolts instead of studs on exhaust manifold?
While it is possible to substitute bolts and nuts for studs and nuts on an exhaust manifold, it may not be recommended. Using studs allows for easier installation by drilling a hole straight through and using a nut and bolt.
5. Do you put Loctite on exhaust bolts?
Yes, you can use Loctite on exhaust bolts. A medium strength thread locking compound, such as the blue 243, is suitable for use on the threads of the bolts. This helps to prevent them from coming loose.
6. What is the maximum span between bolts?
The maximum spacing between bolts depends on the thickness of the parts being connected. For painted members or unpainted members not subject to corrosion, the maximum spacing is typically 24 times the thickness of the thinner part, but not exceeding 12 inches.
7. Is it OK to put anti-seize on exhaust manifold bolts?
If you are reusing exhaust manifold bolts, it is recommended to apply a metal fortified anti-seize to the bolts. However, it is generally recommended to use fresh OEM bolts for the best results when repairing or replacing the exhaust manifold.
