GT5008BS 0R7924 Turbocharger for Caterpillar 3406B | New

GT5008BS 0R7924 Turbocharger for Caterpillar 3406B 15.8L

GT5008BS

The GT5008BS is a Garrett S410-series turbocharger built for the Caterpillar 3406B 15.8L and related heavy-duty diesels. It runs a roughly 78mm compressor wheel and 96mm turbine wheel in a non-gated housing, which suits the steady high-load work these engines do in trucks, gensets and industrial equipment. On the industrial 3406B it serves as a direct replacement, and on many single-turbo road-going C15 engines the same unit is used as a capacity upgrade. Our GT5008BS is built new to OEM-spec with the correct wheels and housing, so it drops in and holds boost where the engine expects it. We confirm the part number against your engine serial before it ships. We supply repair shops, fleets and distributors with single units and bulk orders.

Turbo Model

GT5008BS (S410G)

OEM / Interchange Numbers

0R7185, 196-5952, 0R7285, 0R7275, 0R7203, 0R7299, 0R7924, 0R7223

Application

1998-2001 Caterpillar 15.8L Cat 3406B

Service & Support

1-Year Unlimited-Mileage Warranty
US Stock, Fast Dispatch
Bulk Orders Welcome
White-Label Support
Fully Certified

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FAQ

The GT5008BS fits the Caterpillar 3406B 15.8L as a direct replacement and is also used on 3406E, C16 single-turbo and other heavy-duty Cat diesels. Confirm by the part number on your current turbo, since the same frame spans several ratings.

Yes. On many single-turbo C15 road engines the GT5008BS is fitted as a larger-capacity turbo for more airflow. To get the benefit, your fueling and exhaust need to use the extra capacity; otherwise it bolts on and runs like a standard replacement.

Read the part number off your old turbo's nameplate and send it to us with your engine serial number. We cross-reference it to the exact unit before you order, so the part bolts straight on.

Yes, this GT5008BS is brand new with 100% new components, built to OEM-spec. There is no core charge and nothing to send back. It comes with a one-year warranty.

Yes. We hold this turbo in US stock and supply repair shops, fleets and distributors with single units or bulk orders, with pricing built for resale and steady restock.

GT5008BS Turbocharger: Fitment, Selection and Service Notes

The GT5008BS is one of the most cross-used turbos in the Caterpillar lineup, which is exactly why ordering by name alone causes mix-ups. Here is what matters when you spec one for a 3406B or a C15.

What the GT5008BS fits

This frame covers a wide span of Cat engines. On the 3406B 15.8L it is the factory-size replacement. On 14.6L 3406B/3406C and many single-turbo C15 road engines, the same unit goes on as a larger-capacity turbo that supports more airflow. Always match the part number on your old turbo's nameplate, since rating and housing can change across these applications.

Stock replacement vs capacity upgrade

If your 3406B already ran a GT5008BS, you are doing a straight replacement and nothing else changes. If you are moving up to it from a smaller single turbo on a C15, treat it as an airflow upgrade: confirm your fueling and exhaust can use the extra capacity, or you gain little. The hardware bolts the same either way.

Detail	GT5008BS
Turbo frame	Garrett S410 / GT50 series
Compressor wheel	~78mm
Turbine wheel	~96mm
Housing	Non-gated, large A/R for steady-RPM load
Primary engine	Cat 3406B 15.8L
Also used on	3406E, C16 single-turbo, C15 upgrade

Signs your 3406B turbo needs replacing

Watch for loss of boost and power under load, black or grey smoke, a whine or whistle that wasn't there before, oil at the compressor or turbine seal, and rising exhaust temps. On a non-gated industrial turbo, shaft play and oil leakage are the usual end-of-life signs.

Before you install

Most turbo failures on these engines trace back to the oil supply or the intake, not the turbo itself. Before fitting the GT5008BS, check the oil feed and drain lines are clear, prime the new turbo with clean oil, and inspect the intake for any debris from the old unit. Fixing the root cause is what protects the new turbo and keeps the warranty valid. See our quality process for how each unit is tested before it ships.