Detroit Turbocharger

Detroit Diesel Turbocharger Types by Engine Family

Detroit Diesel has used turbochargers from several manufacturers across its engine lineup. Unlike Cummins, which relies almost entirely on Holset, Detroit sources from BorgWarner, Garrett and its own Daimler-proprietary designs. That means turbo configurations, mounting patterns and actuator types vary a lot from one engine to the next. Here is what you need to know when ordering.

DD15 — The Most Common and Most Complicated

The DD15 is the dominant engine in the Freightliner Cascadia and a core part of the Western Star lineup. It is a 14.8-liter inline-six producing 400 to 505 horsepower, and it has gone through multiple turbo designs across three major emissions generations.

EPA10 (2010–2013) DD15 engines use an asymmetric turbo design — a proprietary Daimler unit with a wastegate actuator. EPA13 (2014–2016) trucks continued with a similar turbo architecture but with updated calibrations and different part numbers. GHG17 (2017+) DD15 engines moved to a BorgWarner B3G-based turbo with a revised wastegate setup. These three generations are not cross-compatible. The mounting bolt pattern may look the same, but the turbo calibration, actuator type and exhaust housing are different. Installing an EPA10 turbo on a GHG17 engine will create fault codes, boost issues and potential aftertreatment damage.

Wastegate actuator failure is the single most common DD15 turbo problem. The actuator controls exhaust bypass to regulate boost. When it sticks or fails, the engine loses boost control, throws fault codes (often SPN 102 or SPN 3563), and may enter derate. Many shops replace just the actuator, but if the turbo has high miles or oil contamination, replacing the full assembly avoids a repeat failure weeks later.

DD13 — BorgWarner B3G Platform

The DD13 is a 12.8-liter engine used in regional and vocational Freightliner trucks. It shares the Cascadia platform with the DD15 but runs at lower power ratings (350–525 HP). The turbo is a BorgWarner B3G variable geometry unit with an electronic actuator. Unlike the DD15's wastegate design, the DD13 turbo uses moveable vanes to control exhaust flow — similar in concept to the VGT systems on Cummins ISX engines. VGT vane sticking from soot buildup is the primary failure mode. When the vanes jam, the actuator overworks and burns out. Common fault codes include SPN 3563 FMI 7 (actuator position error) and SPN 102 FMI 16 (intake manifold pressure high). Replacing the turbo and actuator together is the standard fix.

DD16 — Heavy-Haul Applications

The DD16 is a 15.6-liter engine rated up to 600 HP and 2,050 lb-ft of torque. It is built for heavy-haul, logging, mining and severe-grade vocational work. The turbo setup is similar to the DD15 in architecture, with emissions-tier-specific configurations. DD16 turbos share some part numbers with DD15 units in certain generations, but they are not universally interchangeable — the ESN and emissions tier must be confirmed.

Series 60 — Legacy but Still Running

The Detroit Series 60 was produced from 1987 to 2011 in three displacements: 11.1L, 12.7L and 14.0L. It was one of the most popular Class 8 engines in North America, and many are still in service with over a million miles. Turbo types on the Series 60 include the Garrett GT4294 (11.1L and 12.7L engines), the Garrett GT4502V (14.0L DDEC V), the BorgWarner S400 (12.7L and 14.0L), and the Holset HE531VE (14.0L trucks). The 14.0L DDEC VI engines with DPF systems often use the GT4502V or an equivalent BorgWarner unit. Because the Series 60 is out of production, turbo availability through dealer channels is limited. We keep new replacement units in stock for the most common Series 60 configurations.

Quick Reference: Detroit Engine to Turbo Type

This table covers the most common setups. Actual part numbers vary by production date, emissions spec and horsepower rating. Provide your engine serial number and we will confirm the exact match before shipping.

DD15 Wastegate Actuator Failure — What to Know

The wastegate actuator is the most frequent failure point on DD15 engines. Its job is to bypass exhaust gas around the turbine wheel to regulate boost pressure. When the actuator sticks, corrodes or loses its internal spring tension, boost goes uncontrolled. The engine may overboost, underboost, or swing between the two.

Typical symptoms include power loss under load, high exhaust gas temperatures, black smoke, derate warnings, and fault codes tied to turbo boost pressure (SPN 102) or wastegate position (SPN 3563). Extended idling, short-trip duty cycles and exhaust soot buildup all accelerate actuator wear.

Some shops replace only the actuator. That works if the turbo itself is still in good shape — no shaft play, no oil leaking through the seals, and the turbine housing is not cracked. But if the turbo has high hours or visible wear, replacing the whole assembly is the safer call. We supply both standalone actuators and complete turbo-plus-actuator units for the DD15 to fit either scenario.