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Dealing with snapped or seized exhaust manifold mounting studs buried deep inside a Cummins ISX or ISX15 cylinder head? Freehand drilling with standard hand drills leads to drill bit walking, gouged aluminum or cast-iron head threads, and catastrophic cylinder head replacement. The M20195 Broken Exhaust Manifold Bolt Removal Kit provides rigid, bolt-on alignment templates and hardened drill guides to extract broken studs on-chassis while preserving 100% of the factory thread matrix.

The Critical Physics of Thermal Stress & Exhaust Stud Extraction in Cummins ISX Platforms

On heavy-duty Class 8 Cummins ISX and ISX15 diesel engines, extreme exhaust gas temperatures (EGTs) cause continuous thermal expansion and contraction across the massive multi-piece exhaust manifold. Over hundreds of thousands of miles, this extreme thermal cycling places immense shear stress on the outer exhaust manifold mounting bolts, causing them to fatigue, stretch, and ultimately snap flush or below the cylinder head deck surface. Attempting to drill out hardened, heat-treated alloy studs freehand in a cramped engine bay is extremely hazardous. Because the surrounding cylinder head metal is softer than the hardened, work-hardened stud fragment, a freehand drill bit instantly drifts off-center, destroying the internal M10 or M12 bolt seat threads and boring an oval hole into the head casting. The M20195 template kit completely solves this high-cost nightmare. By bolting a heavy-duty alignment plate directly to adjacent un-broken manifold mounting holes, the kit places hardened slip-fit drill bushings dead-center over the broken stud. This guarantees that center drills, pilot bits, and tapping tools stay on a 100% perpendicular axis—allowing technicians to core out the broken bolt shank cleanly and chase internal threads without disturbing the cylinder head casting.

• Targeted Engine Family Engineering – Custom-designed explicitly for Cummins ISX and ISX15 heavy-duty diesel engine cylinder head bolt patterns.
• Bolted Alignment Plate System – Locks rigidly into adjacent cylinder head bolt holes to create an unyielding, vibration-free drilling template.
• Hardened Steel Drill & Tap Bushings – Slip-fit precision guide bushings prevent bit walking, off-axis tilting, and thread wall contact during core drilling.
• Complete Turnkey Extraction Set – Supplied in a heavy-duty protective carry case with specialized drills, taps, extraction tools, and mounting hardware.
• Saves In-Frame Service Hours – Enables rapid, on-chassis stud extraction in minutes rather than hours, completely eliminating the need to pull the cylinder head off the engine block.

Stop Ruining Cylinder Heads with Freehand Drills. Command Total Fleet Salvage Accuracy.

The M20195 Cummins ISX / ISX15 Broken Exhaust Manifold Bolt Removal Kit is an essential capital asset for commercial truck service bays, heavy fleet repair centers, mobile diesel repair units, and engine overhaul shops. Protect high-value cylinder head castings, slash labor downtime, and extract broken studs with complete mechanical authority using Apex.

Technical Specifications

Technical Metric	Value / Fitment Reference Guidelines
Target Engine Platforms	Cummins ISX and ISX15 Heavy-Duty Commercial Diesel Engines
Primary Operational Function	On-chassis drilling, tapping, and extraction of broken exhaust manifold mounting bolts
Part / Model Reference Number	M20195 (20195)
Kit Tooling Components	Alignment fixture plate, hardened guide bushings, center drills, core drills, taps & extractors
Service Method Class	In-frame guided drilling without cylinder head removal
Case Configuration	Heavy-duty custom blow-molded storage case for field and shop mobility

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