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SKU:
NLT2T02409
Ships for free in 2–4 business days.
T04B91 Turbocharger 4N6858 for Caterpillar 3304 D330C Engines
$593.59
In Stock
$593.59
Sale price
$593.59
Regular price
This is a brand new T04B91 turbocharger for Caterpillar 3304 engine applications, Caterpillar D330C engine applications. It is intended to restore normal boost and airflow when the original turbocharger is worn or damaged.
Estimated delivery between
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Caterpillar 3304 engine applications |
| Caterpillar D330C engine applications |
Product Overview
Loss of boost, sluggish power, blue/black smoke, oil at the compressor outlet, or excessive turbo shaft play are common signs that the turbocharger needs inspection or replacement.
Turbocharger replacement should be paired with a check of the engine oil supply/return, intake tract and exhaust path. Oil starvation, restricted drain lines, debris or another engine problem can quickly damage a replacement turbo if the root cause is not corrected.
Key Features & Performance
- Restores exhaust-driven boost pressure and intake airflow
- Designed for the listed diesel engine/turbo application
- A proper replacement helps recover power when the original turbo has worn bearings, damaged wheels or oil-control problems
Technical Specifications
| Turbo model | T04B91 |
| Diesel engine turbocharger | |
Replaces / Cross-References
4N6858, T04B91
Common Reasons for Replacement
- Low boost and reduced engine power
- Oil leakage into intake or exhaust
- Excessive shaft play or wheel contact
- Unusual turbo noise, smoke or damaged compressor/turbine wheel
Fitment Notes
Confirm 4N6858/T04B91 and compare turbine/compressor housings, flange orientation and oil fittings with the original unit.
Frequently Asked Questions
How should I verify fitment?
Confirm 4N6858/T04B91 and compare turbine/compressor housings, flange orientation and oil fittings with the original unit.
Is this an OEM part?
This listing is for a new replacement part. It is not represented as the original manufacturer's branded part unless the product listing specifically states otherwise.
What should I check before installation?
Compare the replacement with the removed part before installation, correct any related wiring, hose, mounting or system problems, and follow the equipment manufacturer's service procedures.