Coolant Filter Q&A
for Sinister Diesel 2013–2018 6.7L Cummins Coolant Filtration Kit
What filter does this kit use?
The Sinister Diesel 6.7 Cummins Coolant Filtration Kit includes a WIX 24070 spin-on coolant filter. It traps casting sand, rust, and metal shavings that cause heater core, EGR cooler, and oil cooler failures.
Why a bypass filter instead of inline?
The system filters a small percentage of coolant each time the engine runs until all coolant has been cleaned. An inline filter could block flow if it ever clogged, but our bypass design has a built-in fail-safe—coolant still circulates normally with zero risk to the engine or components.
Why WIX?
It offers the perfect balance of filtration and flow for the Cummins 6.7L system. The compact size fits our bracket perfectly, and the 27-micron media removes fine debris without affecting coolant pressure.
Does it change coolant chemistry?
No. The WIX 24070 is a non-chemical filter—no pellets or additives. It won’t alter your coolant blend or require SCA top-offs.
How often should I replace the filter?
• First change: 500 miles
• Second: around 1,000 miles
• Third: at 3,000 miles
• After that: every oil filter service
This schedule keeps your cooling system clean and prevents buildup in small coolant passages.
Will it restrict coolant flow?
No. The filter is engineered for high flow and low restriction, so your coolant pressure stays stable while debris is trapped safely inside the element.
How does this protect my Cummins engine?
By constantly cleaning the coolant, the system prevents abrasive debris from circulating and wearing out your water pump, heater core, or coolers—saving you from costly repairs.
Quick Takeaway
• 27-micron filtration for debris control
• Safe bypass design—no coolant blockage risk
• Maintenance made easy with common WIX replacements
• Extends Heater Core,cooling-system life and reliability
