Buy wp20417 - Genuine Cummins Wastegate Actuator - wisentpartscenter.com

Description

Genuine Cummins 4030019 Wastegate Actuator controls the turbocharger’s internal wastegate by using boost pressure to move the actuator rod. When boost reaches the actuator’s calibrated setting, the rod begins to open the wastegate so the turbo does not overspeed or make uncontrolled boost.

Key Functions
- Regulates wastegate opening based on boost pressure.
- Helps control turbocharger speed and peak boost level.
- Protects the turbo and engine from overboost when the system is operating correctly.
- Restores proper wastegate movement when the original actuator is weak, sticking, or leaking.

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

The 4030019 opens the turbocharger wastegate when boost pressure reaches the actuator’s calibrated point. That keeps the turbo from continuing to drive harder than intended and helps the engine stay within its designed boost range.

Issue Symptoms / When to Replace

A weak, leaking, or sticking wastegate actuator can cause low boost, slow turbo response, poor pulling power, or boost that climbs too high because the wastegate is not opening when it should. A seized wastegate lever, damaged hose, boost-control issue, or turbocharger problem can create similar symptoms, so the actuator should not be blamed until the linkage and wastegate arm are checked by hand.

Brand Information

Cummins has been building diesel engines and related components since 1919. The turbocharger side of this product family comes through Holset, which was incorporated in 1952, acquired by Cummins in 1973, and later became part of Cummins Turbo Technologies while retaining the Holset brand name.

Installation Notes

Do not set the actuator rod by eye. Rod length and preload need to match the turbocharger specification, because too much or too little preload can cause low boost, unstable boost control, or overboost. If the old actuator failed because the wastegate lever was sticking, the lever and flapper movement need to be corrected before installing the replacement or the new actuator may fail early.

How to Identify an OEM Part

A genuine 4030019 can be identified by the factory part-number label on the actuator body.

Why Buy 4030019 from Wisent Parts

  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warranty & 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.