<p>Get your Cummins 4BT3.9 or 6BT5.9 engine back to optimal operating temperature quickly with this complete thermostat kit. The <strong>3917324 thermostat</strong> comes pre-assembled with gasket (3920336) and bushing (3923331), ensuring a leak-free seal and precise temperature regulation to prevent overheating during heavy equipment operation. </p><ul><li>Direct replacement for Cummins 4B3.9, 4BT3.9, 4BTA3.9, 6B5.9, 6BT5.9, and 6BTA5.9 engines</li><li>Includes all necessary components for a single-purchase repair solution</li><li>ISO-certified quality ensures OEM-equivalent performance and durability</li></ul>
| Parameter | Details |
|---|---|
| Part Name | Thermostat with Gasket Bushing |
| Part Number | Thermostat: 3917324, Gasket: 3920336, Bushing: 3923331 |
| Brand | FridayParts |
| Compatible Engine Brand | Cummins |
| Engine Compatibility | 4B3.9, 4BT3.9, 4BTA3.9, 6B5.9, 6BT5.9, 6BTA5.9 |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Brand | Applicable Engine Models |
|---|---|
| Cummins | 4B3.9, 4BT3.9, 4BTA3.9, 6B5.9, 6BT5.9, 6BTA5.9 |
Equipment downtime costs thousands of dollars daily on construction sites and mining operations. Waiting 2–4 weeks for OEM Cummins parts or installing counterfeit thermostats that fail prematurely only worsens the problem. Many repair shops struggle to source complete thermostat kits with gaskets and bushings from a single supplier, leading to delayed maintenance and mismatched components.
Our 3917324 thermostat kit solves these frustrations with a complete solution for Cummins 4BT3.9 and 6BT5.9 engines. As a 10-year global supplier with ISO-certified manufacturing partners, we ensure each thermostat undergoes rigorous pre-shipment testing to match OEM specifications. Whether you’re repairing a construction excavator, mining equipment, or agricultural machinery, this kit delivers reliable temperature regulation to prevent engine overheating and costly breakdowns.
This thermostat assembly operates in the heart of Cummins diesel engines, controlling coolant flow between the engine block and radiator. In high-stress environments like quarrying, port operations, and demolition sites, maintaining optimal engine temperature is essential for preventing piston damage, head gasket failures, and reduced fuel efficiency. The included gasket (3920336) and bushing (3923331) ensure a leak-free seal, eliminating the risk of coolant loss that can lead to sudden shutdowns during critical operations.
Every component in this kit is designed to meet Cummins’ strict engineering standards. The thermostat housing is constructed from high-grade cast metal to withstand extreme temperature fluctuations, while the valve mechanism features precise calibration to open at the exact temperature threshold (typically 82°C/180°F for these engine models). The 3920336 gasket uses heat-resistant rubber compound to maintain seal integrity under pressure, and the 3923331 bushing provides secure mounting to prevent vibration-induced leaks—key considerations for equipment operating in rough terrain.
Choosing an uncertified thermostat may save upfront costs, but the consequences are severe. Counterfeit parts often have inconsistent temperature regulation, leading to engine overheating or incomplete warm-up, which increases wear and reduces combustion efficiency. A failed thermostat can cause $5,000+ in engine repairs and 40+ hours of downtime. Our ISO-manufactured 3917324 kit, backed by a 3–12 month warranty, ensures long-term reliability and reduces total cost of ownership by minimizing unexpected failures.
Our commitment to quality and service sets us apart: We work exclusively with ISO 9001-certified factories and conduct incoming material inspections on every batch. Each thermostat undergoes functional testing to verify opening/closing temperatures before shipment. With 10 years of export experience, our 20+ technical team provides accurate part verification within 2 hours, ensuring you get the right component the first time. Our Guangzhou warehouse stocks 10,000+常用 parts, so this Cummins thermostat kit ships within 2–5 working days for urgent repairs.
Don’t let a faulty thermostat keep your Cummins-powered equipment idle. Send us your engine model, required quantity, and destination, and we’ll provide a competitive quote within 24 hours. First-time clients can request sample testing to verify quality. With our fast shipping and 3–12 month warranty, you’ll minimize downtime and get back to work sooner.
Q: Is this a genuine Cummins part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket part, manufactured in ISO-certified facilities to match Cummins specifications.
Q: How can I confirm it fits my specific engine?
A: Provide your engine model (e.g., 6BT5.9) or serial number, and our technical team will verify compatibility within 2 hours.
Q: What does the warranty cover?
A: We offer a 3–12 month warranty against manufacturing defects. If the part fails under normal use, we’ll replace it free of charge.
Q: What is the minimum order quantity?
A: We accept orders for 1 piece, ideal for emergency repairs or single-unit maintenance.
Q: How long will it take to receive my order?
A: In-stock items ship within 2–5 working days. Express shipping takes 3–7 days globally; air freight 5–10 days; sea freight 20–40 days.
Q: Can I get a sample before placing a bulk order?
A: Yes, first-time clients can request sample testing to verify quality and compatibility before bulk purchases.
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WhatsApp: +86 13316055942 | Email: talos@xunpojx.com
Send us your requirements -- part number, machine model, quantity, and destination. Our team responds within 24 hours with a competitive quote.
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