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Cummins Air Crossover Connection 4988520 – OEM Quality Replacement for ISX15/QSX15 Engines
The Cummins 4988520 Air Crossover Connection is a durable aluminum tube designed for ISX15 and QSX15 inline-6 diesel engines, featuring reinforced flanges and high-temperature seals for leak-free turbo-to-intercooler airflow, optimal boost pressure, and reduced intake restriction in heavy-duty trucks such as the Freightliner Cascadia and Peterbilt 389.
Product Details
Key Parameters
| Parameter | Details |
|---|---|
| OE Number | 4988520 |
| Compatible Engine Models | Cummins ISX15, QSX15 (Tier 4/Stage IV) |
| Compatible Vehicle Models | Freightliner Cascadia, Peterbilt 389, Kenworth T680, International HX |
| Material | Aluminum Alloy with High-Temp Silicone Seals |
| Dimensions | Length: 500 mm; Diameter: 100 mm (approx.); Flange: 4-Bolt |
| Warranty | 1-Year Volgen Power Standard |
| MOQ | 1 piece |
| Net Weight | 2.5 kg |
Cross Reference
Equivalent Part Numbers:
- 4988520
- 3687223
- 3687224
- 4354049
- Aftermarket Ref: Automann 561.4988520
Features & Advantages
- Aluminum Alloy Construction: Engineered for heavy-load turbo operation, providing superior heat dissipation and resistance to cracking under boost pressure.
- Reinforced Flanges: Precision-machined with 0.01mm tolerance for perfect turbo/intercooler fit, reducing leaks and intake restriction.
- High-Temp Seals: Silicone gaskets withstand 250°C+ for leak-proof performance in EGR-equipped engines.
- Versatile Application: Suitable for construction, mining, and long-haul trucking, ensuring a reliable boost in Tier 4 ISX15/QSX15 fleets.
Common Faults & Replacement Signals
- Boost Leaks: Cracked or loose connections cause whistling noises or power loss—replace if pressure drop >5 psi.
- Intake Restriction: Corroded or damaged tubes lead to high EGT or turbo lag; check for black smoke or reduced MPG.
- Seal Failure: Degraded gaskets result in oil/coolant contamination; monitor for white smoke or low boost warnings.
- Flange Warping: High-heat cycles without timely replacement cause misalignment; inspect during 100,000-mile service.
Installation Notes
- Preparation: Relieve boost pressure and remove old tube; inspect turbo/intercooler flanges for damage.
- Alignment: Apply high-temperature sealant to flanges, install with new gaskets, and torque bolts to 25 Nm in a cross pattern (consult the manual).
- Sealing: Ensure silicone seals seat fully; use OEM clamps for a secure fit.
- Testing: Run the engine, check for leaks using a soap solution, and monitor boost pressure for 10 minutes.
- Pro Tip: Use anti-seize on bolts and a calibrated torque wrench to avoid warping; replace clamps if corroded.
Packaging & Shipping
- Packaging: Sealed in an anti-corrosion bag with protective foam insert, boxed for safe transit.
- Delivery: Worldwide free shipping on orders over $50; 3-7 days to most locations from the China warehouse.
Ready to Order? Get a Quote Today! Website: www.volgenpower.com Email: [email protected] 24/7 Support: +86 18827435225
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