The 5.9 Cummins engine, a powerhouse known for its reliability and longevity, has a component called the grid heater. This system assists in cold-weather starting by preheating the glow plugs, ensuring easier ignition. However, some owners opt for a grid heater delete, a modification that removes the grid heater system from the engine. This decision, however, carries significant implications that should be carefully considered. This comprehensive guide explores the pros, cons, and alternatives to a grid heater delete on your 5.9 Cummins.
Why Consider a Grid Heater Delete?
The primary motivation behind a grid heater delete is often centered around simplicity and potential cost savings. Removing the grid heater system eliminates a potential point of failure and its associated repair costs. Some owners also report experiencing improved starting in warmer climates, though this is debated. Additionally, the delete can slightly improve engine bay airflow, although this benefit is usually minimal.
What are the Risks of Deleting the Grid Heater?
The most significant risk associated with a grid heater delete is hard starting in cold weather. Without the preheating provided by the grid heater, the engine may struggle to start, especially in temperatures below freezing. This can lead to:
- Increased wear and tear on the starter motor: Repeated cranking puts stress on the starter, potentially leading to premature failure.
- Battery drain: Extended cranking depletes the battery, potentially leaving you stranded.
- Engine damage: In extreme cases, persistent hard starting can damage the engine itself.
Additionally, some diagnostic trouble codes (DTCs) might be triggered by the removal of the grid heater, potentially impacting your vehicle's emissions testing.
What Happens if You Delete the Grid Heater?
Deleting the grid heater essentially removes the supplementary heating element that assists in combustion during cold starts. The engine will rely solely on the glow plugs, which may not be sufficient in extreme cold. The engine's computer (ECU) may also throw a check engine light due to the missing system. This necessitates either using a bypass plug or programming the ECU to ignore the missing grid heater input. It's important to note that bypassing the system without properly addressing the ECU can lead to further complications.
Can I Drive Without a Grid Heater?
While you can drive without a grid heater, especially in warmer climates, it's not advisable in colder regions. Doing so significantly increases the risk of hard starting and potential engine damage. The reliability and ease of starting your 5.9 Cummins are compromised, and the potential repair costs far outweigh the minor benefits of a delete.
What are the Alternatives to a Grid Heater Delete?
Instead of deleting the grid heater, consider these alternatives:
- Troubleshooting and Repair: Before resorting to a delete, diagnose and repair any issues with your existing grid heater system. A faulty grid heater relay or damaged wiring may be the source of problems, easily resolved without compromising cold-weather starting capabilities.
- Battery Upgrade: A higher-capacity battery provides increased cranking power, making cold-weather starts easier even with a functioning grid heater.
- Block Heater: A block heater plugs directly into your engine block and provides more effective preheating than a grid heater, especially in extreme cold.
Is a Grid Heater Delete Worth It?
For most 5.9 Cummins owners, a grid heater delete is not worth the risk. The potential benefits are minor and significantly outweighed by the risks associated with hard starting in cold weather, increased wear and tear on the starter and battery, and potential engine damage. Unless you live in a consistently warm climate and thoroughly understand the implications, exploring alternative solutions is highly recommended.
This information is for educational purposes only. Always consult a qualified mechanic before performing any modifications to your vehicle.
