Dongfeng Truck QSL9 Exhaust Valve 3921444

Keywords: 3921444 exhaust valve, QSL9 engine exhaust valve, Dongfeng truck exhaust valve, diesel engine exhaust valve spare part, construction machinery engine valve, aftermarket replacement exhaust valve

Product Overview

Exhaust Valve Part No.3921444 is an important engine valve component for QSL9 diesel engine used on Dongfeng trucks and heavy‑duty construction machinery. It is responsible for opening and closing exhaust passages during engine working cycles, discharging burned exhaust gas out of combustion chamber, ensuring normal engine ventilation and stable power output. This replacement exhaust valve solves typical failures including insufficient power, rough idle, exhaust gas blow‑by and abnormal engine noise caused by original exhaust valve burning, deformation, wear and sealing failure. Each exhaust valve undergoes strict hardness inspection, surface detection and dimensional tolerance test before shipment.

Detailed Specifications

Key Features & Advantages

• High‑quality heat‑resistant alloy steel material, outstanding high‑temperature resistance and wear‑resistance under engine high‑temperature working environment.
• Precise machining for valve head and stem, excellent sealing performance, reduce exhaust leakage.
• Surface hardening treatment, anti‑abrasion and anti‑burning performance, prolong service life.
• Effectively eliminate engine power loss, unstable idle and abnormal knocking noise caused by damaged original exhaust valve.
• Strict dimensional consistency, direct fit for QSL9 engine overhaul and maintenance projects.

Application Scope

Fit Equipment: Dongfeng trucks and heavy‑duty machinery equipped with QSL9 diesel engine ‑ Widely applied for engine repair workshops and routine equipment maintenance projects.

Our Company Advantage

• We are professional supplier of full‑range construction machinery spare parts, supplying engine parts, hydraulic parts, electrical parts, seal kits and complete overhaul kits.
• Large ready stock for various machinery spare parts
• Factory‑direct wholesale competitive price
• Mixed‑order & one‑stop spare‑parts procurement supported
• Professional part‑number matching technical support service

Packaging & Shipping

• Neutral export carton with shock‑proof inner packing, avoid scratch and collision during long‑distance transportation
• Multiple shipping options: sea freight, air freight, international express for small trial orders
• Export documents such as Commercial Invoice, Packing List can be provided.

Contact Us

If you need more excavator spare parts or other construction machinery replacement components, please send your parts list to us. We will offer our best quotation for you quickly.