If you notice a bad smell or loud noises coming from your truck, it could have an exhaust manifold leak. These leaks are annoying and dangerous if you don’t handle them sooner rather than later. You may be wondering what could cause an exhaust manifold leak so that you can be on the lookout. When you know the prevalent causes, you can understand how to stop this issue from happening again.
One of the primary culprits behind an exhaust manifold leak is the failure of the exhaust gasket, a small but vital component in the engine system. The exhaust gasket creates a tight seal between the exhaust manifold and the engine block. As the engine heats and cools during regular use, the exhaust gasket can gradually wear down. Over time, wear and tear can compromise the gasket’s integrity, ultimately leading to potential leakage issues that may impact the vehicle’s performance.
Given the continuous exposure to elevated temperatures and corrosive gases, such as sulfur and nitrogen oxides, exhaust manifolds are particularly vulnerable to corrosion. These substances can lead to the formation of tiny cracks or perforations in the manifold. Over time, these cracks may expand due to thermal cycling and mechanical stresses, potentially causing leaks that can compromise the efficiency and performance of the entire exhaust system.
The bolts that secure the exhaust manifold to the engine block withstand constant vibrations and thermal changes, leading to a gradual loosening over time. You must regularly check and tighten these bolts to stop gaps from forming and allowing exhaust gas to leak out.
Improper installation of an exhaust manifold can also be a contributing factor to leaks. Inadequate alignment during installation, along with poor sealing due to improper torque specifications or aged gaskets, can result in the seepage of exhaust gases. This affects the performance of the vehicle and can lead to potential damage to the manifold, like overheating of the surrounding components.
A few different things can cause an exhaust manifold leak, but whatever the cause, you should remediate it before it creates further complications and safety risks. Regular maintenance and proper installation practices can prevent leaks, and you need the right parts. At NorCal Diesel Performance, we have a wide selection of 2007-2018 Cummins exhaust parts, so you can keep nasty exhaust manifold leaks at bay.
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