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Why Mechanics Grind Down Perfectly Good Car Parts!

Throttle Theory
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Why Mechanics Grind Down Perfectly Good Car Parts!
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How do mechanics permanently fix a noisy exhaust leak?! ⚙️🚗
If your car sounds like a tractor and has a loud "ticking" noise coming from the engine bay, you probably have a blown exhaust manifold gasket! The exhaust manifold bolts directly to the engine block, funneling superheated exhaust gases out to the tailpipe. Over time, that extreme heat causes the cast-iron metal to physically bend and warp!
When the metal warps, it breaks the gasket seal and causes a massive leak. You can't just install a new gasket because the metal is no longer flat! Mechanics have to put the manifold on a heavy-duty grinding machine to shave the rusted, warped iron back down to a perfectly flat, shiny surface. Without this machining step, the new gasket will blow out almost immediately!