05/29/2026
Did you know that McRoberts Motors works on Exhaust?
We want to share some insight into a common, yet complex, issue regarding exhaust manifold bolts.
🍀The Cause: rust forms within your vehicle's mechanical components.
🍀Modern vehicles with compacted engine bays, only allow room for smaller bolts.
🍀Thermal Stress and Fatigue: Engines heat up rapidly, while the surrounding exhaust components warm gradually. This extreme temperature differential, combined with the natural shifting and vibration of the vehicle during travel, puts immense stress on the rusted bolts. Over time, this causes the rusted, weakened, bolt heads to shear off entirely. It may also cause the manifold to warp.
🍀Safety: Improper exhausted cars can be harmful to passengers.
The Repair Process
Extracting a broken bolt from such a confined, awkward space is a highly technical procedure.
To safely remove a sheared bolt, our technicians must precision-weld a new "head" onto the remaining fragment just to create a gripping surface for extraction. Furthermore, while working on one rusted bolt, it is common for adjacent rusted bolts to also snap.
While replacing a bolt may sound like a minor task, the reality of this repair requires specialized labor, patience, and precise engineering. The technical difficulty and the time required to complete the extraction safely, without damaging your engine head, makes it is a labor intensive job.
Why Choose McRoberts Motors?
Our team has the specialized welding equipment and technical expertise required to handle these delicate extractions properly. If you suspect an exhaust leak or hear an unusual ticking noise when your engine starts, let our professionals take a look. Call us at 636-377-4343.
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