Buy wp20362 - Genuine Cummins EGR Cooler for ISB - 3 - wisentpartscenter.com

Description

4946088 is a Genuine Cummins EGR cooler used on select Cummins ISB/ISBe applications. The EGR cooler lowers exhaust gas temperature before recirculated exhaust enters the intake system, helping control combustion temperature and emissions output. This part should be matched by the original Cummins part number, engine serial number, vehicle application, and EGR system layout before ordering. Verify 4946088 by ESN, original part number and the cross-reference / supersession list shown on this page. Genuine Cummins is preferred when avoiding repeat EGR cooler failures such as seal leaks, cracked cores due to metal fatigue, or coolant restrictions is critical, since repeat replacement can be costly in labor, parts, and downtime.

Purpose of the Part

The EGR cooler transfers heat from recirculated exhaust gas into the engine coolant circuit. A working cooler helps the EGR system send cooler exhaust gas back into the intake. When the cooler fails or becomes restricted, the engine may lose coolant, build soot, overheat, or set EGR system performance faults.

Issue Symptoms / When to Replace

Common signs of a failed or restricted 4946088 EGR cooler may include:

  • Coolant loss with no clear external leak
  • White smoke or steam from the exhaust
  • Coolant smell from the exhaust system
  • Coolant contamination near the EGR valve or intake side
  • Excessive soot buildup inside the EGR circuit
  • Engine overheating or cooling-system pressure issues
  • Check engine light, derate, or EGR flow / temperature-related faults

Confirm the failure before replacement. Similar symptoms can also come from the EGR valve, coolant lines, head gasket, sensors, or plugged EGR passages.

Brand Information

Cummins is the original engine manufacturer for the ISB platform and supplies OEM engine, emissions, fuel, air-handling, and cooling-system components. Genuine Cummins parts are built to match the engine’s original service requirements. For EGR cooler replacement, OEM quality matters because repeat failure can mean another teardown, more labor, more downtime, and another coolant-system service.

Installation Notes

Before replacing 4946088, confirm the ESN, original part number, application, and supersession list shown on this page. Drain coolant to the required level, remove the intake/EGR connections, disconnect coolant lines, and remove the old cooler from the mounting brackets. Clean the mounting surfaces, replace required gaskets and seals, then install the new cooler without forcing the flanges or tubes into position. Refill and bleed the cooling system, check for leaks, and verify EGR system operation after the engine reaches operating temperature. Refer to Cummins QuickServe or the OEM service manual for torque specs and final test procedures.

How to Identify an OEM Part

A Genuine Cummins 4946088 EGR cooler should be verified by the Cummins part-number label, original packaging, and any stamped, tagged, or marked identification on the cooler. Match the cooler to the removed part and to the supersession numbers listed on this product page. Do not rely on shape alone, because aftermarket units may copy the appearance but use different core construction, weld quality.

Why buy from Wisent Parts
  • ⏱️
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  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

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Warrany & Return Information

Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.

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