To find the block heater on a 6.7L Cummins engine, look on the passenger side immediately above and behind the oil filter. The heater is installed inside the engine’s water jacket, so you may see only its electrical connection or protective cap. If a cord is fitted, trace it toward the front bumper, grille, or right air-dam opening.
The most important distinction is between the heater element and the external cord. A 6.7L Cummins may have the element installed even when the cord is missing, and cord routing varies by Ram model year and truck configuration.
Key takeaways
- The 6.7L Cummins block-heater element is on the passenger side of the engine, immediately above and behind the oil filter.
- The visible part may be only an electrical connection or protective cap because the resistance heater is installed inside the engine’s water jacket.
- A 6.7L Cummins can have the heater element installed without an external power cord, so a missing cord does not necessarily mean the heater is missing.
- On 2022 Ram 2500 and 3500 trucks, the cord is routed behind the front bumper and accessed through the right air-dam opening; a 2019 Ram manual describes routing near the right grille and headlamp.
- The 2022 Ram manual specifies 110–115 volts AC, 6.5 amps, and at least one hour of connection for an adequate warming effect.
Where is the block heater on a 6.7 Cummins?
The 6.7 Cummins block heater is on the passenger side of the engine, immediately above and behind the oil filter. Look for the heater’s electrical connection or protective cap rather than expecting to see a large heater body. The heating element itself is installed in the engine’s water jacket.
Ram describes the component as “a resistance heater installed in the water jacket of the engine just above and behind the oil filter” in the 2022 Ram extreme-cold-weather owner-manual guidance.
#1 Best Overall
- Compatible With: This Block heater cord compatible with Ford 7.3 6.0 6.4 6.7 L Powerstroke Diesel F350 F250; Compatible with 1989-2018 Dodge Ram Cummins Diesel 5.9, 6.7 L; Compatible with 1989-Current Dodge Cummins 5.9L Diesel Engines; Compatible with 2007-Current Dodge Cummins 6.7L Diesel Engines.
- Replace OE: Designed as a direct replacement for OE part numbers 251919, 6B018, 251919C, 68409910AB, 28216, 28216X and 3600008, this block heater cord seamlessly replaces the original equipment, maintaining the vehicle's heating system at optimal performance levels.
- High Quality: Block heater replacement cord Crafted with durable materials and precision engineering, this engine block heater cord guarantees longevity and reliability, providing efficient heat transfer to the engine block, even in extreme cold conditions.
- Function: This block heater cord ensures that your vehicle's engine remains warm, promoting easier starts and reducing wear on critical engine components, especially during freezing temperatures.
- Specification : Voltage: 120 Volts; Current: 15 Amps; Length: 6-feet(1. 8m); Internal material: copper wire; Wire type: 16/3 HPN; Silicone connector: right angle; Pin distance: 0. 360"; Pin diameter: 0. 138".
How do you find the 6.7L Cummins block heater?
- Park safely and switch the ignition off. Let the engine cool before reaching around the oil filter, intake hardware, belts, or other engine components.
- Locate the oil filter. The oil filter is the most useful landmark for finding the heater.
- Inspect immediately above and behind the oil filter. Search the passenger side of the engine for the electrical connection, cable socket, or protective cap.
- Check from more than one angle. If the connection is hidden from above, inspect through the passenger-side wheel well or from underneath the truck.
- Improve access if necessary. Depending on the truck and engine-bay layout, temporarily removing the air-intake snorkel can improve visibility. Follow the truck’s service instructions and do not work under an inadequately supported vehicle.
- Trace any attached cord toward the front of the truck. The cord’s exit point changes with model year, Ram series, body, and chassis configuration.
Installation documentation also uses the passenger-side, oil-filter area as the locating reference and notes that access may require looking from below or working around intake components. The Cummins block-heater bumper-plug installation instructions are useful corroborating guidance, although their listed truck applications are older than many current 6.7L Cummins trucks.
Why can’t you see the block heater from above?
You may not see the 6.7L Cummins block heater from above because the oil filter, intake components, and surrounding hardware obstruct the connection. The heater is not normally a prominent external device; the visible portion can be a small connector or cap located behind the oil filter.
Look down from the passenger side first, then use a flashlight from the passenger-side wheel well or below the engine. Avoid placing hands near hot components, rotating parts, or unsupported truck hardware.
What is the difference between the heater element and the block-heater cord?
The heater element is the resistance heater installed in the engine water jacket. The block-heater cord is the external cable that connects that heater to a grounded 110–115-volt AC power source. The element and cord are related parts, but they are not necessarily supplied or replaced as one assembly.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Ram states that “The engine block heater cord is a factory installed option. If your vehicle is not equipped, heater cords are available from an authorized Mopar® dealer.” That distinction means a truck can have the heater element above and behind the oil filter while lacking the cord that reaches the grille or bumper.
Rank #2
- Block Heater Cord Compatible with Cummins 1989-2024+ Diesels (5.9 & 6.7 Liter)
- 6' High Quality Rubber for long life and flexability in the cold.
- Plug ends are molded into cord, not just glued on to it like products of lesser quality. Keeps moisture out
- 1500w rated
- A BMI Exclusive Product!
A specialty-parts listing likewise identifies the replacement heater element separately and says that the element “Does not include heater cable. Order separately.” If the heater connection is present but no cable reaches the front of the truck, the likely requirement is a replacement 6.7 Cummins block heater cord, not a complete heater-element installation.
Where is the 6.7 Cummins block heater cord?
The 6.7 Cummins block heater cord, when fitted, runs from the heater connection toward the front of the truck, but the outlet location is not universal across Ram model years and configurations.
| Truck documentation | Described cord route or access point | What the difference means |
|---|---|---|
| 2022 Ram 2500/3500 | Behind the front bumper; accessible through the right air-dam opening | Look at the passenger-side front air-dam area rather than assuming the cable is visible on top of the engine. |
| 2019 Ram 2500 | Under the hood toward the right side near the grille and headlamp | The cable may be found near the passenger-side front corner instead of through the same bumper access used on the 2022 documentation. |
| Other 6.7L Cummins applications | Varies by model year, Ram series, pickup versus chassis cab, and prior installation work | Use the engine-side connection above and behind the oil filter as the fixed landmark, then trace the actual cable on the truck. |
The 2022 Ram engine-block-heater instructions describe the bumper and right-air-dam arrangement. The 2019 Ram 2500 owner’s manual describes the under-hood route near the right grille and headlamp. These descriptions concern cord routing, not different locations for the heater element itself.
Does every 6.7L Cummins come with a block-heater cord?
No. The presence of a 6.7L Cummins engine does not by itself prove that the truck has an external block-heater cord. Ram treats the engine block-heater cord as a factory-installed option and says replacement cords are available through an authorized Mopar dealer when the vehicle is not equipped.
Check the engine-side connection above and behind the oil filter before concluding that the entire heater is absent. If the connection or cap is present but the cord is missing, verify the truck’s model year, Ram series, pickup or chassis-cab configuration, and VIN before ordering a replacement.
Rank #3
- ✔Compatible with: 1995-Current Ford 6.0 6.4 6.7 6.8 7.3L Powerstroke Diesel. Model: E-350, E-450 ,E-550, F-250, F-350, F-450, F-550, Econoline Super Duty, Excursion, F-53 Motorhome Chassis; 1989-Current Dodge Cummins 5.9L Diesel Engines. Model: D250, D350, Ram 2500, Ram 3500, W250, W350. Please check the second main picture to confirm engine block heater cord whether compatible with your car.
- ✔Compatible with: 2007-Current Dodge Cummins 6.7L Diesel Engines. Model: Ram 2500, Ram 3500, Ram 4500, Ram 5500; 2011-Current Ram Cummins 6.7L Diesel Engines. Model: 2500, 3500, 4500, 5500; 1994-Current International Harvester 7.3L Diesel Engines. Model: 4700LP, 4700LPX. Please check the second main picture to confirm engine block heater cord whether compatible with your car.
- ✔3600008 Block Heater Cord Specification: Wire type: 16/3 HPN; Silicone connector: right angle; Pin distance: 0.360", Pin diameter: 0.138". Wire specifications: 120 volts; 6 feet. (1. 8m); 16 gauge; Plug type: 120 Volt, 15 Amp.
- ✔High-quality: Made of high-quality material have high-temperature resistance, can quickly heat the engine to the appropriate operating temperature, effectively combating the cold start issue in extreme weather. Tested to meet OEM quality standards, excellent performance and long service life.
- ✔OE# 3600008. Replace OE# 251919, 6B018, 251919C, 68409910AB, 28216, 28216X. Package included: 120V Engine Block Heater Cord with Cap x1. Not included instruction manual. Easy to install, it fits perfectly and has accurate structure.
How should you choose a replacement 6.7 Cummins block heater cord?
Choose a cord by application and connector fit, not only by the words “Cummins block heater.” The correct cord must match the truck’s model year and configuration and must reach the intended grille, bumper, or air-dam access point.
| Decision point | What to verify | Why it matters |
|---|---|---|
| Model-year and configuration fit | Ram series, model year, pickup versus chassis cab, and VIN or parts-catalog fitment | Cord routing, connector design, and application coverage can vary. |
| Replacement scope | Cord-only versus heater-element-and-cord kit | A cord-only replacement avoids buying an element when the installed heater is intact. |
| Construction | OEM or aftermarket manufacturer and connector design | The connector must mate correctly with the installed heater and tolerate winter exposure. |
| Length and routing | Distance from the heater connection to the desired front access point | A cord that is too short cannot be routed safely without strain. |
| Weather protection | Tethered cap or protected bumper connection | The connection should be protected when the heater is not plugged in. |
| Part number | Application-specific catalog data, such as Mopar 68409910AB where applicable | Parts data identifies 68409910AB for 2019–2024 Ram 6.7L Cummins applications and shows it replacing 68409910AA, but fitment should still be confirmed against the VIN or current catalog. |
For a reader who has confirmed the heater element but cannot find the external cable, a 6.7 Cummins block heater cord is the most relevant replacement search. Confirm the application before ordering; do not assume that a cord listed for one Ram year or body configuration fits every 6.7L Cummins truck.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
An authorized Mopar dealer is another legitimate path for a genuine Mopar block-heater cord, especially when VIN-based fitment is more important than price. Specialty diesel-parts retailers may also list replacement heater elements and cables, but retailer listings should be checked carefully for the exact year and configuration.
What voltage and amperage does the 6.7L Cummins block heater use?
The 2022 Ram owner manual specifies a 110–115-volt AC supply and 6.5 amps for the engine block heater. According to Ram/Mopar’s 2022 engine-block-heater instructions, the cord should be connected to a properly grounded electrical outlet using a grounded, three-wire extension cord.
According to Ram/Mopar’s 2022 guidance, leaving the heater plugged in for at least one hour provides an adequate warming effect. The heater is intended to warm the engine before starting; it does not replace a healthy battery, suitable engine oil, correct fuel treatment, or a properly maintained glow-plug and starting system.
Rank #4
- Engineered and tested to withstand the extremes of temperature, moisture and vibration
- Single heavy duty cord with male plug and silicone female connector
- Works on heavy duty heaters
- 120 volts; 6 ft. (1. 8m); 16 gauge; Plug Type: 120 Volt, 15 Amp
- Wire type: 16/3 HPN; silicone connector: right angle; pin distance: 0. 360", pin diameter: 0. 138"
When should you plug in the 6.7L Cummins block heater?
Temperature guidance differs slightly by Ram manual and model year, so use the manual for the specific truck. The 2019 Ram 2500 manual recommends block-heater use below 0°F (−18°C) and says it is required below −20°F (−29°C). A separate 2022 Ram cold-weather instruction recommends an externally powered electric engine block heater for reliable starting below −22°F (−30°C).
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems| Guidance source | Temperature guidance | How to apply it |
|---|---|---|
| 2019 Ram 2500 owner’s manual | Recommended below 0°F (−18°C); required below −20°F (−29°C) | Use this threshold for the 2019 Ram 2500 guidance rather than applying it automatically to every model year. |
| 2022 Ram cold-weather instruction | Recommends an externally powered electric engine block heater below −22°F (−30°C) | Use the 2022 truck’s manual and local conditions when deciding how early to connect the heater. |
See the 2022 Ram cold-weather operation guidance and the 2019 Ram 2500 owner’s manual for the model-specific recommendations.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How do you use the block heater safely?
- Use a grounded, three-wire extension cord connected to a suitable outlet.
- Inspect the heater cord, plug, insulation, and connection for damage before use.
- Keep the plug and connection protected from water, contamination, and physical damage.
- Disconnect the heater cord before starting the truck and before driving.
- Do not use a damaged 110–115-volt cord. Ram warns that cord damage can create an electrocution hazard.
- Route the cord so it cannot contact hot, moving, or sharp components.
Ram’s engine block-heater safety instructions are the controlling reference for the truck’s electrical connection and cord use.
What should you do if the heater connection is present but the cord is missing?
- Confirm that the connection above and behind the passenger-side oil filter is actually the block-heater connection and not another engine-bay connector.
- Inspect the passenger-side front bumper, right air-dam opening, grille, and headlamp area for a loose or tucked-away cable.
- Check whether the cord was removed, damaged, or routed behind trim during previous repairs.
- Identify the truck’s model year, Ram series, body style, and pickup or chassis-cab configuration.
- Verify the replacement cord through a VIN-based parts catalog, authorized Mopar dealer, or application-specific product listing.
- Install and route the replacement so the connection is protected and the cord cannot reach moving or hot parts.
Do not order a complete heater element simply because the front plug is absent. A missing external cable commonly calls for a cord-only replacement, while a defective or missing element requires a different repair and should be confirmed before parts are purchased.
Frequently Asked Questions
Where is the block heater on a 6.7 Cummins?
The 6.7L Cummins block-heater element is on the passenger side of the engine, immediately above and behind the oil filter. The visible part may be only the electrical connection or protective cap because the resistance heater is installed inside the engine’s water jacket.
Free tools Windows power users keep installed
One-click scans. No signup required.
Best Value
Does every 6.7L Cummins come with a block-heater cord?
No. Ram identifies the engine block-heater cord as a factory-installed option, so a truck may have the heater element but no external cable. Inspect above and behind the oil filter, then check the passenger-side front bumper, right air dam, grille, and headlamp area for the cord.
How long should a 6.7 Cummins block heater be plugged in?
The 2022 Ram manual specifies 110–115 volts AC and 6.5 amps, and Ram recommends leaving the heater connected for at least one hour for an adequate warming effect. Use a grounded, three-wire extension cord and disconnect the cord before driving.
When should you plug in a 6.7L Cummins block heater?
The 2019 Ram 2500 manual recommends using the block heater below 0°F (−18°C) and says it is required below −20°F (−29°C). Separate 2022 Ram guidance recommends an externally powered electric engine block heater below −22°F (−30°C), so follow the manual for the specific truck.
The Bottom Line
Find the 6.7L Cummins block heater on the passenger side of the engine, immediately above and behind the oil filter. Then trace the cord toward the front of the truck, remembering that the outlet location varies by model year and configuration. If the heater connection is present but no cord reaches the grille or bumper, verify fitment for a replacement cord before replacing the heater element.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
