Upper & Lower Gasket Kit 6547863 6547864 for Cummins Engine QSF3.8

Product Specifications

Compatible Models

Tired of Engine Rebuild Delays? Get the Correct Upper & Lower Gasket Kit 6547863/6547864 for Cummins QSF3.8

Every hour your QSF3.8-powered machine sits idle during a rebuild costs hundreds — sometimes thousands — in lost productivity. Counterfeit gaskets swell, leak, or blow out under pressure, forcing repeat teardowns. OEM kits take 3+ weeks to arrive and cost up to 45% more. And sourcing upper and lower gaskets separately from multiple suppliers risks mismatched thicknesses, material grades, and torque specs — compromising cylinder sealing integrity.

OEM-Equivalent Quality, Ready to Ship

This Cummins QSF3.8 gasket kit is manufactured in ISO 9001-certified facilities and undergoes full functional testing before shipment — including compression resistance, thermal cycling, and oil/coolant compatibility checks. With 10 years’ experience supplying engine rebuild kits globally, XUNPO delivers precision-matched upper and lower gasket sets that install directly into QSF3.8 blocks without modification — supporting fast, reliable rebuilds for fleet operators and repair centers across North America, Africa, and Southeast Asia.

Where This Part Works

This Cummins QSF3.8 gasket kit performs under high-load conditions: earthmoving on construction sites, continuous operation in quarries, repetitive lifting at ports, and vibration-heavy demolition work. It maintains sealing integrity between cylinder head and block despite thermal expansion cycles, coolant pressure fluctuations (up to 1.5 bar), and combustion chamber pressures exceeding 180 bar — making correct material selection and dimensional accuracy non-negotiable.

Engineering Details That Matter

The upper gasket uses multi-layer steel (MLS) construction with elastomer coating for dynamic surface conformity and reusability under controlled torque. The lower gasket features reinforced graphite composite with copper stopper rings to prevent extrusion at high cylinder pressures. Both layers are laser-cut to ±0.03 mm tolerance — ensuring perfect alignment with QSF3.8’s 10.5 mm deck height and 12-bolt pattern. Surface hardness meets SAE J431 G3000 specification for long-term fatigue resistance. All materials comply with Cummins’ chemical resistance standards for diesel fuel, antifreeze, and exhaust gas recirculation (EGR) exposure.

The Real Cost of Wrong Parts

A $25 counterfeit gasket can trigger $2,800 in labor for a second teardown, $1,200 in damaged head surfaces, and 3 days of downtime — totaling over $4,500 in hidden TCO. Genuine-equivalent kits like this Cummins QSF3.8 rebuild gasket kit meet ISO 45001-aligned production controls and pass OEM-specified burst tests (≥350 psi). Using incorrect thickness or material leads to head warpage, coolant-oil mixing, and premature bearing failure — violating warranty terms on rebuilt engines. Total cost of ownership drops when you choose verified, tested parts — not just the lowest sticker price.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in static-resistant polybags, nested in molded foam trays, packed in double-walled corrugated cartons
• In-stock items ship within 2–5 working days after payment confirmation
• Flexible logistics: DHL/FedEx/UPS express (3–7 days), air freight (7–12 days), or sea freight (25–40 days)
• Real-time tracking number provided upon dispatch via email and WhatsApp
• MOQ is 1 piece — designed for urgent field repairs and small-batch rebuilds

Get Your Cummins QSF3.8 Gasket Kit Now

Your QSF3.8 engine isn’t generating revenue while waiting for parts. Send us your part number (6547863/6547864), machine model, and required quantity — we’ll reply with a competitive quote within 24 hours. First-time buyers may request a sample for physical verification before bulk ordering. Stock is available now in Guangzhou.

Frequently Asked Questions