Sinister Diesel Coolant Filtration System – 2013–2018 Ram 2500 / 3500 6.7L Cummins

Fitment

Fits 2013–2018 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine.

⚠️ IMPORTANT FITMENT NOTICE
Some aftermarket cold air intake systems may interfere with the coolant filter mounting bracket or filter block. If your truck has an aftermarket intake, verify available clearance before ordering.

Key Features

• Helps Prevent Costly Heater Core Repairs – Filters contaminants that can clog the heater core, restrict coolant flow, and leave your Ram with little or no cabin heat
• Avoid Expensive Dash Removal – A clogged heater core may require replacement involving extensive dashboard disassembly and potentially thousands of dollars in repair costs
• Removes Harmful Coolant Contaminants – Captures casting sand, rust, metal particles, sediment, and other debris circulating through the cooling system
• Bypass Coolant Filtration – Continuously filters a small amount of coolant while maintaining normal primary cooling system flow
• WIX 24070 Coolant Filter – Serviceable spin-on filter designed to capture debris without adding chemicals to the coolant
• Helps Protect Critical Cooling Components – Cleaner coolant helps protect the heater core, water pump, EGR cooler, oil cooler, and other small coolant passages
• CNC-Machined 6061 Billet Aluminum Filter Block – Durable construction finished in signature Sinister Blue
• Vehicle-Specific Mounting Bracket – Designed for a straightforward installation on your 6.7L Cummins
• Reinforced Silicone Hoses – Built to handle demanding underhood temperatures and cooling system conditions
• Easy Filter Maintenance – Replaceable spin-on filter makes routine servicing simple
• 1-Year Warranty – Backed by Sinister Diesel for quality and reliability

Product Overview

Help Prevent a Clogged Heater Core Before It Becomes a Costly Repair

One of the most frustrating cooling system problems a Ram 2500 or 3500 Cummins owner can experience is a clogged heater core. Contaminants circulating through the coolant can gradually accumulate inside the heater core's narrow passages, restricting coolant flow and leaving you with weak cabin heat or no heat at all.

The repair can be expensive. On many Ram trucks, replacing the heater core requires extensive dashboard disassembly, turning a relatively small cooling system component into a repair that can cost thousands of dollars in parts and labor.

The Sinister Diesel Coolant Filtration System is designed to help prevent that problem by removing harmful contaminants from your cooling system before they have a chance to accumulate inside the heater core.

Why Your 6.7L Cummins Needs Coolant Filtration

Your factory cooling system does not include a dedicated coolant filter. That means casting sand, rust, sediment, metal shavings, and other contaminants can continue circulating through the engine as the coolant flows.

Over time, these particles can collect in small coolant passages, contribute to heater core restrictions, and accelerate wear on other cooling system components.

Our bypass coolant filtration system addresses this problem by continuously routing a small amount of coolant through a dedicated WIX spin-on filter while the engine is running. The filter captures contaminants as coolant circulates through the bypass circuit, helping keep the entire cooling system cleaner over time.

Because the filter operates independently of the primary coolant flow path, it does not place a restrictive filter directly in the engine's main cooling circuit.

Built for Your Cummins. Designed for Long-Term Protection.

The system features a precision CNC-machined 6061 billet aluminum filter block finished in signature Sinister Blue, a vehicle-specific mounting bracket, and reinforced silicone hoses designed for demanding underhood conditions.

Installation adds a dedicated coolant filtration circuit without replacing your factory cooling system components.

Whether you use your Ram for daily driving, heavy towing, hauling, or work, keeping contaminants out of the coolant is a practical way to help protect your heater core and other expensive cooling system components.

A coolant filter is a small investment compared to the cost and inconvenience of replacing a clogged heater core.

Recommended Coolant Filter Service Interval

• Initial Filter – Replace after 500 miles
• Second Filter – Replace after approximately 1,500 additional miles
• Third Filter – Replace after approximately 3,000 additional miles
• Regular Maintenance – Replace at every oil change

The initial filter changes help remove existing contamination from the cooling system. Continued filter maintenance helps capture new debris as it develops.

What's Included

(1) WIX 24070 Coolant Filter
(1) Sinister Diesel CNC-Machined Billet Aluminum Filter Block
(1) Vehicle-Specific Mounting Bracket
Reinforced Silicone Hoses
Required Installation Hardware

Frequently Asked Questions

Q: Can a clogged heater core cause my Ram Cummins to lose cabin heat?
A: Yes. Rust, casting sand, sediment, and other contaminants can accumulate inside the heater core's narrow coolant passages. As coolant flow becomes restricted, the heater may produce weak heat or stop heating properly. Other cooling system and HVAC problems can cause similar symptoms, so proper diagnosis is important.

Q: How does the Sinister Diesel Coolant Filtration System help prevent heater core failure?
A: The system continuously removes suspended contaminants from the coolant as the engine operates. By reducing the amount of debris circulating through the cooling system, it helps prevent buildup inside the heater core and other small coolant passages.

Q: How much does it cost to replace a clogged heater core on a Ram 2500 or 3500?
A: Depending on the model, labor rates, and repair requirements, heater core replacement can cost thousands of dollars. On many Ram trucks, the repair involves extensive dashboard disassembly, making labor a significant part of the expense. Installing a coolant filtration system can help reduce the risk of contaminant-related clogging.

Q: What coolant filter does this kit use?
A: The kit includes a WIX 24070 spin-on coolant filter designed to capture contaminants such as rust, sediment, casting sand, and metal particles. Replacement filters are serviceable and can be changed during routine maintenance.

Q: Why does Sinister Diesel use bypass coolant filtration instead of an inline filter?
A: A bypass system filters a small portion of coolant at a time while allowing the factory cooling system to maintain its primary coolant circulation. Unlike a filter installed directly in the main coolant path, a bypass filter does not create a direct restriction in the engine's primary cooling circuit.

Q: Does the WIX coolant filter change my coolant chemistry?
A: No. The WIX 24070 is a non-chemical coolant filter. It does not contain supplemental coolant additives or chemical pellets that alter the coolant mixture.

Q: Will this kit work with an aftermarket cold air intake?
A: Some aftermarket cold air intake systems may interfere with the coolant filter mounting bracket or filter block. Verify available clearance before ordering if your truck has an aftermarket intake.

Q: How often should I replace the coolant filter?
A: Replace the first filter after 500 miles, the second after approximately 1,500 additional miles, and the third after approximately 3,000 additional miles. After completing the initial filter changes, replace the coolant filter at every oil change.

Q: Will coolant filtration fix a heater core that is already clogged?
A: No. A coolant filtration system is designed to remove circulating contaminants and help prevent future buildup. If your heater core is already severely restricted, additional cleaning, flushing, or replacement may be necessary to restore proper coolant flow.

Q: What other components benefit from cleaner coolant?
A: In addition to helping protect the heater core, coolant filtration reduces the circulation of abrasive debris that can contribute to wear or restrictions in the water pump, EGR cooler, oil cooler, radiator, and other cooling system components.

Why Choose Sinister Diesel

Since 2009, Sinister Diesel has developed products designed to address common diesel truck reliability concerns. Our coolant filtration systems are built to help protect expensive cooling system components by removing contaminants that the factory cooling system does not filter.

For 2013–2018 Ram 2500 and 3500 owners, one of the biggest advantages is helping prevent heater core clogging before it turns into a costly, time-consuming dashboard removal and repair.

Keep your coolant cleaner, help protect your heater core, and give your 6.7L Cummins cooling system an additional layer of protection with Sinister Diesel.