If you drive a Dodge Ram 1500, you already know how important it is to keep your truck running smoothly. One of the simplest but most crucial maintenance tasks is replacing and installing spark plugs.
The correct Dodge Ram 1500 spark plug gap is about 0.043–0.045 inches, while the recommended torque specification is typically 13–22 ft-lbs, depending on engine type and service manual guidelines for precise installation.
In this guide, we’ll break down everything you need to know about the Dodge Ram 1500 spark plug gap and torque, from year-by-year specifications to step-by-step installation tips.
Understanding Spark Plugs and Their Role
A spark plug might be small, but it plays a huge role in how your engine runs. Its job is to ignite the air-fuel mixture inside the cylinder, which powers your truck. For this to happen correctly, two things must be right:
- Gap – This is the distance between the center and ground electrode. If the gap is too wide or too small, combustion will not be efficient.
- Torque – This is how tightly the spark plug is fastened into the cylinder head. Proper torque ensures a solid seal, good heat transfer, and prevents damage.
When either of these is off, you may experience misfires, rough idling, or even long-term engine issues.
Factory-Recommended Spark Plug Gap for Dodge Ram 1500
The spark plug gap varies depending on the engine and model year of your Dodge Ram 1500. Using the factory recommendation is always the safest choice. For example, a 2009 Ram 1500 with a 5.7L HEMI requires a 0.043-inch gap, while newer 2019–2023 HEMI engines typically run at about 0.044 inches.
Here’s a quick reference table:
| Model Year | Engine | Recommended Gap |
| 2009–2012 | 5.7L HEMI V8 | 0.043 in |
| 2013–2017 | 3.6L V6 | 0.043 in |
| 2013–2018 | 5.7L HEMI V8 | 0.043 in |
| 2019–2023 | 5.7L HEMI V8 | 0.044 in |
| 2020–2023 | 3.6L Pentastar V6 | 0.043 in |
Always double-check with your owner’s manual or a Mopar service guide, since aftermarket plugs may sometimes come pre-gapped incorrectly.
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Torque Specs for Dodge Ram 1500 Spark Plugs
Correct torque is equally important as the gap. If the plug is too loose, it can cause misfires, poor sealing, and even blowouts. On the other hand, overtightening can crack the cylinder head or strip the threads.
Here are the general torque specifications for the Dodge Ram 1500:
| Engine | Torque (ft-lbs) | Torque (Nm) |
| 3.6L V6 | 13–15 ft-lbs | 18–20 Nm |
| 5.7L HEMI V8 | 13–15 ft-lbs | 18–20 Nm |
| 6.2L Supercharged V8 | 15 ft-lbs | 20 Nm |
Using a torque wrench is the best way to ensure accuracy. Never guess with hand-tightening because modern aluminum heads are sensitive and costly to repair.
What Happens If Spark Plug Gap Is Wrong?
If the gap is too wide, the spark may be weak or inconsistent, leading to misfires and poor acceleration. On the other hand, a gap that’s too tight can restrict the spark, causing incomplete combustion. Both situations reduce fuel efficiency and may shorten engine life.
What Happens If Spark Plug Torque Is Incorrect?
Torque mistakes can be even more damaging than gap errors. Under-torqued plugs may loosen over time, leading to engine misfires or even blowing out of the cylinder. Over-torqued plugs can cause cracked spark plugs, damaged cylinder heads, and expensive repairs.
How to Check and Adjust Spark Plug Gap
Checking and adjusting the spark plug gap is simple with the right tools:
- Use a feeler gauge to measure the current gap.
- Compare it to the recommended spec for your engine.
- If the gap is too wide, gently bend the ground strap inward. If too narrow, pull it outward slightly.
- Re-check the measurement before installing.
Take care not to damage the center electrode while adjusting.
How to Torque Spark Plugs Correctly
Here’s a straightforward process for installing spark plugs with the correct torque:
- Thread the plug in by hand to avoid cross-threading.
- Attach a torque wrench and tighten to the manufacturer’s specification.
- Apply a small amount of dielectric grease to the coil boot for better connection.
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Recommended Tools for the Job
You don’t need a full workshop, but a few key tools make the job much easier:
- Spark plug socket with rubber insert
- Torque wrench
- Ratchet with extensions
- Feeler gauge
- Spark plug gap tool
- Dielectric grease
Best Spark Plugs for Dodge Ram 1500
Choosing the right spark plug also makes a difference. Copper plugs are inexpensive but wear quickly, platinum plugs last longer, and iridium plugs offer the best balance of performance and lifespan.
For most Dodge Ram 1500 models, OEM-recommended brands like NGK, Champion, or Mopar work best. Iridium plugs are often preferred for HEMI engines because they provide a strong spark and longer service intervals.
Spark Plug Gap & Torque Reference Table (Quick Overview)
| Engine | Gap | Torque | Recommended Plug |
| 3.6L V6 | 0.043 in | 13–15 ft-lbs | Champion RE14MCC4 |
| 5.7L HEMI | 0.043–0.044 in | 13–15 ft-lbs | NGK LZTR4A-11 |
| 6.2L V8 | 0.044 in | 15 ft-lbs | Mopar SP-143270AA |
Common Mistakes to Avoid
Some common errors when changing spark plugs include:
- Using the wrong gap size.
- Installing without a torque wrench.
- Applying too much anti-seize, which can alter torque readings.
- Cross-threading plugs when installing by force.
Taking your time and using the right tools helps prevent costly mistakes.
When to Replace Spark Plugs in a Ram 1500
Most Ram 1500 spark plugs last between 30,000 and 60,000 miles, depending on plug material and driving conditions. Symptoms that it’s time for replacement include rough idle, engine misfires, poor acceleration, or reduced fuel economy.
DIY or Professional Installation?
If you’re confident with tools and follow specs carefully, replacing spark plugs at home is a manageable job. However, if you don’t have a torque wrench or if your truck has a crowded engine bay, a professional mechanic can save time and avoid mistakes.
2013 Dodge Ram 1500 Spark Plug Gap and Torque
For a 2013 Ram 1500, set the spark plug gap around 0.043 inches. Torque each plug to about 13–15 ft-lbs using a torque wrench. Staying within these specs helps ensure smooth performance, safe ignition, and better mileage.
2018 Dodge Ram 1500 Spark Plug Gap and Torque
The 2018 Ram 1500 works best with plugs gapped at 0.043 inches. Tighten them carefully to 13–15 ft-lbs. Always check with a torque wrench, as over- or under-tightening can cause misfires, wasted fuel, or engine damage.
2012 Dodge Ram 1500 Spark Plug Gap and Torque
On the 2012 Ram 1500, spark plugs should be set at 0.043 inches. Torque them down to 13–15 ft-lbs. Using the right specs keeps your ignition reliable and avoids problems like hard starts, rough idle, or misfires.
2016 Dodge Ram 1500 Spark Plug Gap and Torque
The 2016 Ram 1500 typically uses a 0.043-inch spark plug gap. Torque should be 13–15 ft-lbs. These simple but important steps protect the cylinder head threads, give you smoother acceleration, and help maintain your truck’s fuel efficiency.
2022 Dodge Ram 1500 Spark Plug Gap and Torque
For the 2022 Ram 1500, the spark plug gap is about 0.044–0.045 inches. Torque each plug to 13–15 ft-lbs. Following these settings ensures proper combustion, prevents engine strain, and keeps your HEMI or V6 engine performing at its best.
2005 Dodge Ram 1500 Spark Plug Gap and Torque
A 2005 Ram 1500 should have spark plugs gapped at roughly 0.040–0.044 inches, depending on the engine. Torque them to 18–20 ft-lbs. Always confirm specs in your service manual to keep your older Ram safe and reliable.
2021 Dodge Ram 1500 Spark Plug Gap and Torque
The 2021 Ram 1500 generally runs best with a 0.044-inch spark plug gap. Torque each one to 13–15 ft-lbs. Using the right settings prevents misfires, helps your truck start easily, and keeps engine performance strong.
2007 Dodge Ram 1500 Spark Plug Gap and Torque
On a 2007 Ram 1500, most spark plugs should be set around 0.040–0.043 inches. Tighten them to about 18–20 ft-lbs.
Correct installation keeps your ignition system safe, avoids stripped threads, and supports steady, fuel-efficient driving.
2014 Ram 1500 5.7 spark plug torque
For the 2014 Ram 1500 with a 5.7 L HEMI engine, you typically torque the spark plugs to about 13 ft-lb if following many owner-mechanic practices.
If using premium plugs with specific charts, you might see 18-21 ft-lb—just ensure you follow your plug maker’s instructions.
2017 Dodge Ram 1500 spark plug gap and torque
On a 2017 Dodge Ram 1500, the gap for the spark plugs is usually around 0.043-0.045 inches, and the torque is often about 13 ft-lb for many owners.
If your plugs come with a spec chart, check that and stick to it so everything fires right and nothing gets damaged.
2010 Dodge Ram 1500 Spark Plug Gap & Oil Change
For the 2010 Dodge Ram 1500, the spark plug gap is often around 0.043 inches, though it can vary by engine type.
Also, when you do spark plugs, it’s smart to change the engine oil too if it’s due—keeping both ignition and lubrication fresh helps the truck run smoother.
Spark plug gap and torque specs???
When you see “spark plug gap and torque specs,” it means: gap = how far the plug’s electrodes sit apart, and torque = how tightly the plug is screwed in.
Always use the specs for your exact engine and plug brand so you avoid misfires or damage from loose or overtightened plugs.
Sparks and Recreation
“Sparks and Recreation” could be a fun way to say “playing around with ignition parts.” In the truck world it might mean you’re enjoying the spark plug and ignition system swap—cleaning, gapping, installing—turning maintenance into a satisfying weekend project.
Spark Plug Gap ’14+ Hemi?
If you have a 2014 or newer HEMI engine, the spark plug gap is commonly around 0.043-0.045 inches. But because specs can differ by model year and plug brand, check the label under the hood or the plug’s instructions before you set it, just to be safe.
DIY: Hemi 5.7L Spark Plug Change
Doing a DIY spark plug change on a HEMI 5.7 L means: buy the right plugs (16 if two per cylinder), check and set the gap (~0.043-0.045″), clean the wells, hand-thread each plug, torque to spec (often ~13 ft-lb), reconnect coils, and double-check for misfires.
2020 Ram 1500 spark plug gap
The 2020 Ram 1500 spark plug gap is usually around 0.043 to 0.045 inches. Always check your engine label or the spark plug box to confirm. Keeping the correct gap helps your truck run smoother and saves fuel.
2013 Ram 1500 spark plug gap
For the 2013 Ram 1500, the spark plug gap is typically about 0.043 inches. Double-check your owner’s manual or plug packaging before installing. The right gap gives better ignition, smoother starts, and improved engine performance every time.
2019 Ram 1500 5.7 spark plug gap
The 2019 Ram 1500 with the 5.7 L HEMI engine usually needs a spark plug gap of around 0.043 to 0.045 inches. Check each plug before installing to ensure accuracy—proper gapping keeps your HEMI running strong and efficient.
Frequently Asked Questions
1. What Is The Torque Spec For The Spark Plugs On A Ram 1500?
Torque spark plugs to 13–15 ft-lbs on most Ram 1500 engines. Using a torque wrench keeps your plugs safe and secure.
2. What Is The Spark Plug Gap On A 5.7 Hemi Ram 1500?
The 5.7 HEMI usually requires a spark plug gap of 0.043–0.044 inches. Always check your service manual for exact specs.
3. What Is The Spark Plug Gap On A 2014 Dodge Ram 1500?
For the 2014 Ram 1500, the recommended spark plug gap is around 0.043 inches. Confirm the setting before installation.
4. What Is The Spark Plug Gap On A 2005 Dodge Ram 1500 3.7 V6?
The 2005 Ram 1500 with a 3.7 V6 engine uses a spark plug gap of about 0.040–0.044 inches.
5. What Is The Torque On The Spark Plugs On A 5.7 Hemi?
Spark plugs on the 5.7 HEMI should be torqued to 13–15 ft-lbs. Always use a torque wrench for accuracy.
6. What should I torque my spark plugs to?
Most spark plugs need about 13 to 18 ft-lb of torque. Always check your plug brand’s instructions before tightening.
7. What is the torque on a Dodge Ram 1500?
For most Dodge Ram 1500 engines, tighten spark plugs to around 13 ft-lb. Check your manual for exact specs before installing.
8. What years to avoid for the 5.7 Hemi Ram 1500?
Avoid 2003, 2011, and 2014 5.7 HEMI Ram 1500 models due to common issues like lifter failure and ticking engine problems.
9. How often should I replace spark plugs on my 5.7 Hemi?
Change spark plugs every 30,000 to 60,000 miles depending on plug type and driving conditions for best engine performance.
10. What are the recommended torque specs for spark plugs in a 2014 Ram 5.7 engine?
Torque spark plugs to about 13 ft-lb on a 2014 Ram 5.7 HEMI. Always confirm with your service manual or plug chart.
Conclusion
The Dodge Ram 1500 spark plug gap and torque are small details that make a huge difference in how your truck runs. By following the correct specifications, checking the gap, and torquing plugs properly, you’ll enjoy smoother performance, better fuel economy, and a longer engine life.
Whether you do the job yourself or leave it to a mechanic, keeping up with spark plug maintenance is one of the best ways to protect your Ram 1500 and keep it running like new.