In Caterpillar engines, the 4907200 valve and 1979322 cylinder liner form a critical partnership, each playing a distinct role in supporting combustion efficiency. The valve acts as a precise gatekeeper: it opens to let air enter the combustion chamber during the intake stroke and closes tightly to seal gases during compression and combustion, then opens again to release exhaust. This timing is vital—any leakage due to a worn valve can reduce compression, lowering power output and increasing fuel use.
The 1979322 cylinder liner, meanwhile, serves as a durable barrier between the piston and the engine block. As the piston moves up and down thousands of times per minute, the liner absorbs friction and heat, preventing direct contact that would scratch or warp the block. It also helps contain the high-pressure gases from combustion, ensuring they push the piston with maximum force rather than escaping. A damaged liner—such as one with cracks or excessive wear—can cause pressure loss, oil contamination, or uneven piston movement.
Both components face harsh conditions: valves endure extreme heat from combustion, while liners cope with constant piston friction and temperature swings. Signs of wear include rough engine idle (from valve leakage), reduced power (due to liner wear affecting compression), or increased oil consumption (as fluids seep through worn surfaces). Addressing these issues promptly preserves engine health and avoids costly damage.
Ningbo Qiuning Trading Co., Ltd., a trusted supplier, offers both genuine and aftermarket options for the 4907200 valve and 1979322 cylinder liner. Genuine parts are manufactured to Caterpillar’s original standards, ensuring precise fit and cooperate with performance that matches the engine’s design—ideal for those prioritizing long-term reliability. Aftermarket parts, designed to meet basic functional requirements at a more economical price, suit users seeking practical solutions that maintain essential engine protection and gas control.
Understanding how these components work together highlights their importance in engine performance. Whether for construction equipment or industrial engines, our team is ready to assist with inquiries. For more information or to discuss your needs, contact us via WeChat/WhatsApp: +8615888032469 or E-mail: allen@perkins-rx.com.
Engine parts
Pump bearing 1B3867, Kate C15 engine 1B3867
Caterpillar C15 engine seal ring 11788011178801
Caterpillar C15 engine hood assembly 7E65087E6508
Engine gasket 9Y6089/ Caterpillar C15 engine 9Y6089
Transmission seal 5P5846/ Caterpillar C15 engine 5P5846
O-ring 5P8068/ Caterpillar C15 engine 5P8068
Gasket 280795/ Caterpillar C15 engine 2S0795
Lip fuel injector 389643/ Caterpillar C15 engine 3S9643
Transmission seal 8C3089/// Caterpillar C15 engine 8C3089
Caterpillar C15 engine transmission Seal 8T43518J4351
CAT C15 engine CAT diesel engine oil /15W-40 18L3E99003E9900
Transmission seal ring 2147568/ Caterpillar C15 engine 2147568
Engine O-ring 2385080/ Caterpillar C15 engine 2385080
Engine seal ring 2385081// Caterpillar C15 engine 2385081
Caterpillar C15 engine seal ring 21475662147566
Type 0 sealing ring 9X7317/ Caterpillar C15 engine 9X7317
Type 0 sealing ring 1075769/ Caterpillar C15 engine 1075769
Turbocharger pad 184295/ Caterpillar C15 engine 1S4295
Engine sealing ring 1135304/ Caterpillar C15 engine 1135304
O-ring 8C5230/ Caterpillar C15 engine 8C5230
Transmission seal 9H0846// Caterpillar C15 engine 9H0846
