Karcher Cylinder Head Kit (4.551-191.0) – Pressure Washer Replacement
Cure devastating internal leaks and instantly restore the high-pressure blasting power of your domestic machine with the Karcher Cylinder Head Kit (4.551-191.0). Serving as the absolute core of your pressure washer's pump system, this critical manifold is responsible for housing the high-pressure valves and sealing the pistons. Over years of use, exposure to harsh chemicals, and freezing winter temperatures, the original plastic cylinder head can warp or develop hairline cracks. This results in severe water leaks from the bottom of the machine and relentless, frustrating motor pulsing.
Replacing the damaged manifold with this genuine OEM Karcher pump replacement part is the most cost-effective way to save your machine from the landfill. Specifically designed as an exact-fit replacement for select Karcher K2 and K3 series domestic pressure washers, this high-grade plastic pressure washer cylinder head perfectly seals the pump block, allowing it to generate maximum PSI output. Measuring 100mm x 80mm x 60mm, this complete kit ensures you can quickly rebuild your pump and get back to effortlessly washing cars, patios, and pathways with factory-level performance.
Who Is This Karcher Cylinder Head Ideal For?
This genuine replacement pump head restores watertight integrity and maximum pressure. It is highly recommended for:
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DIY Homeowners: Safely and cheaply repairing their own leaking K2 or K3 pressure washer in the garage, completely avoiding the high cost of purchasing a brand-new machine.
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Appliance Repair Technicians: Sourcing authentic, exact-fit Karcher pump components to ensure professional, long-lasting, and warrantable repairs for client machines.
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Cold Climate Residents: Replacing cylinder heads that have fatally cracked or expanded after water was accidentally left inside the pump to freeze during winter storage.
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Auto Detailers: Curing the frustrating 'pulsing' or 'hiccoughing' issue on their compact Karcher machines so they can snow-foam cars smoothly.
Key Features and Performance Benefits:
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Restores Maximum Pressure: Fixes microscopic hairline cracks in the manifold, completely sealing the pump to return the machine's water pressure to factory levels.
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Cures Motor Pulsing: Stops the internal pressure leaks that cause the electric motor to constantly surge and turn on/off when the trigger is not being pulled.
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Genuine OEM Precision: Manufactured directly by Karcher (Part 4.551-191.0), guaranteeing exact dimensional accuracy for a flawless fit against the internal pistons.
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Durable Engineering: Constructed from high-grade, pressure-rated plastic designed to withstand the intense hydraulic forces generated by K2 and K3 electric motors.
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Cost-Effective Repair: Prevents the wasteful and expensive disposal of an entire pressure washer by isolating and replacing the single failed component.
Technical Specifications:
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Brand: Karcher (Genuine OEM Replacement Part)
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Product Type: Cylinder Head Kit (040) RV
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Part Number: 4.551-191.0
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Dimensions: 100 mm x 80 mm x 60 mm
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Material: High-Strength Pressure-Rated Plastic
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Compatibility: Select Karcher K2 and K3 Series Pressure Washers (Always verify fitment with your specific machine's parts diagram).
