163-2478 Valve Stem Seal for CAT 3126B Engine GP: Stop Oil Consumption
Is your CAT 3126B engine burning oil, producing blue exhaust smoke, or showing signs of increased oil consumption between changes? Worn valve stem seals are a common culprit. The 163-2478 VALVE STEM SEAL for CAT 3126B ENGINE GP is the genuine OEM seal designed to prevent engine oil from leaking into the combustion chamber. Replacing part numbers 163-2478 or 1632478 restores proper sealing, protects engine performance, and is a key component in a comprehensive engine overhaul.
Direct Fit for Caterpillar 3126B Engine Applications
This Cat engine valve stem seal is the correct OEM part for the Caterpillar C-12 and 3126B diesel engines, widely used in various equipment. Ensure compatibility with your specific machine model:
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For Caterpillar On-Highway Trucks: Used in engines powering CAT CT660, CT680, and other trucks with the 3126B/C-12 engine.
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For Industrial & Marine Applications: Fits 3126B engines used in generators, pumps, and marine propulsion units.
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For Construction Equipment: Applicable to certain models of loaders, excavators, and other machinery equipped with the 3126B power unit.
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Critical Note: This is a valve stem seal for the CAT 3126B Engine GP. Always verify your engine’s specific model and serial number for parts compatibility.
Why Choose Genuine CAT Valve Stem Seals?
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OEM Material & Precision Fit: This genuine CAT engine part is made from heat-resistant materials that withstand high engine temperatures. It is engineered to the exact dimensions of the valve guide, ensuring a perfect seal and preventing both oil leakage and valve stem binding.
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Reduces Oil Consumption & Blue Smoke: Worn seals allow oil to drip onto the valve stem and into the cylinder. New 163-2478 seals effectively stop this, eliminating blue smoke on startup or under load and reducing overall oil burn.
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Protects Engine Performance & Emissions: By preventing oil from contaminating the combustion chamber, these seals help maintain proper compression, prevent spark plug fouling (in applicable engines), and reduce particulate emissions.
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Essential for Engine Longevity: Replacing worn valve stem seals during a valve job or head rebuild is a preventative measure that protects the catalytic converter (if equipped) and contributes to the overall health and longevity of the engine.
Technical Details & Application
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Genuine Part Numbers: 163-2478 / 1632478.
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Component Type: Valve Stem Seal (Engine Internal Component).
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Function: Creates an oil-tight seal around the engine’s intake and exhaust valve stems, preventing lubricating oil from entering the combustion chamber while allowing the valve to move freely.
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Application: A critical engine rebuild part for the Caterpillar 3126B and C-12 diesel engines. Typically replaced as a full set during cylinder head service.
Symptoms of Worn or Failed Valve Stem Seals
Consider replacing your seals with 163-2478 if you observe these signs:
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Blue/Gray Exhaust Smoke: Particularly noticeable on engine startup after idling, or during deceleration.
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Excessive Oil Consumption: The engine uses more oil than normal without any visible external leaks.
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Spark Plug Fouling: (For gasoline applications, though 3126B is diesel. This is a general symptom for context).
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During Engine Overhaul: This seal is a standard replacement item during any cylinder head reconditioning or major engine repair on a 3126B.
Order Your CAT 3126B Valve Stem Seals Today
Complete your engine repair with genuine quality. Our 163-2478 valve stem seal for CAT 3126B engine is available for your maintenance or rebuild project.
Click to order the CAT 163-2478 Valve Stem Seal. Contact us for technical support to confirm the correct parts for your specific engine serial number.
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