Description: Open Breather Conversion Kit
Condition: New
Brand: International®
Part Number: 2512556C91
Fitment Guide 2512556C91: Engine I334 2010 MaxxForce DT, 9, 10
Bill of Materials 2512556C91:
| Name |
Quantity |
Part Number |
| Duct Assembly Turbocharger Inlet |
1 |
1889602C91 |
| Clamp, Hose |
1 |
7092089C1 |
| Strap, Tie |
1 |
1847046C1 |
| Hose, Brthr Outlet |
1 |
7094955C1 |
| Instruction Sheet |
1 |
4328187R4 |
An Open Breather Conversion 2512556C91 is a modification where a vehicle’s crankcase ventilation system is changed from a closed system (recirculating vapors back into the intake) to an open system that vents those vapors to the atmosphere.
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1. Reduce Oil in the Intake System
In a factory closed crankcase ventilation (CCV) system:
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Blow-by gases (oil vapor + combustion gases) go back into the intake.
-
That oil mist can coat the turbo, intercooler, intake piping, and EGR components.
An open breather helps:
2. Help With Performance Builds
On modified or high-boost engines:
This can:
3. Simpler System (Fewer Components)
Some owners prefer:
4. Common in Off-Road or Race Applications
In racing or off-road builds where emissions compliance isn’t required, it’s often used to:
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Signs of Troubles 2512556C91:
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1. Strong Oil Smell
If you notice:
The breather may be venting too close to the firewall, exhaust, or HVAC intake.
2. Oil Drips Under the Vehicle
You may see:
-
Oil spots under the truck
-
Wet residue around the breather hose
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Oil mist coating nearby components
This can happen if:
3. Excessive Crankcase Pressure
If the breather is clogged, kinked, or undersized, pressure can build up.
Signs include:
4. Check Engine Light
Some modern vehicles monitor crankcase ventilation flow. An open breather conversion can cause:
5. Dirty Engine Bay
If the breather filter is low quality or missing:
6. Whistling or Hissing Sounds
Improper routing or loose fittings can cause:
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Manufacturer information
Navistar® is a proud manufacturer of some of the widely used trucks, yellow school buses, defense vehicles, and engines. It was recognized as the first truck and engine manufacturer to be certified by the EPA for meeting 2007 standards for hydrocarbons and particulate matter. But the company's global portfolio is not limited to its line of vehicles and engines—it also carries high-quality replacement parts and accessories to keep all these working in top condition at all times. From hose fuel, bolts, plugs, rivets, and bearings to flashers, incandescent lamps, camshaft brake, gasket injector, and spring door locks, Navistar has also got you covered.
Warranty
First Truck Parts offers a 365-days warranty for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.
