One of the ways to repair a busted cast iron exhaust manifold is by welding it back together. Welding is good stuff!… But it is also painful. In this article, we will discuss the positives of welding a cast iron exhaust manifold and what you can do to get it done the right way.
When done right, you can save big bucks and you're still looking at one durable cast iron exhaust manifold. So you don’t need to purchase a new one—it may be possible for you to fix such old ones by welding! A high-quality weld can make the manifold last through the years, including when it is submitted to high heat.
Weld with the Appropriate Rod: Cast iron requires a specific type of welding rod for example a nickel or nickel-iron rod. Use the wrong rod and the weld might fail at a critical joint.
Heat the Manifold: Preheating the cast iron will prevent it from cracking. You can do that with a propane torch or by placing it in a low-temperature oven.
There are several issues you may encounter while welding a cast iron exhaust manifold, these can include cracking, warping and achieving a good weld. Here is how to prepare the manifold for welding:
Clear the Surface: Clean the space thoroughly before beginning to ensure that no dirt, grease or rust remains. This makes the welds adhere better.
Selecting the correct method to weld a cast iron exhaust manifold is crucial to the success of the repair. There are various types of technique-possible stick welding, MIG welding or TIG welding. Both have their pros and cons, so you’ll just have to choose one that works for you and suits your skills.