The Hemi engine is considered one of the most powerful engines that deliver higher power to your ride. Despite being popular, there are several problems with the 5.7 Hemi that can affect the engine’s performance.
Some of the most common problems with Dodge 5.7 Hemi include oil leaks, rough idle, broken exhaust manifold bolts, the multi-displacement system, and poor emission control.
In this article, we’ll discuss these problems in detail so that you can identify them easily. We’ll also share some important tips to help you prevent these problems and keep your engine running optimally.
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Is Dodge 5.7 Hemi a Good Engine?
Yes, Dodge 5.7 Hemi is a good engine that generates 395 pound-feet of torque and generates 370 horsepower.
Flickr Image by Greg Gjerdingen
Some of the most popular vehicles that use Dodge 5.7 Hemi include Ram Trucks 2003+, Dodge Durango 2004+, Dodge Magnum R/T 2005-2008, Dodge Charger R/T 2006+, Dodge Challenger R/T 2009+, Chrysler 300C/300S 2005+, Jeep Grand Cherokee 2005+, and Jeep Commander 2006-2010.
The engine was released back in 2003 and it has gone through many updates since then to improve fuel efficiency and power. Some major updates include MDS (Multi-Displacement System), intake manifolds, and variable camshaft timing or variable valve timing.
Common Problems with Dodge 5.7 Hemi
Here’s a list of common problems that owners of 5.7 Hemi engines have experienced in their vehicles.
1. Broken Exhaust Manifold Bolts
Arguably, broken or faulty exhaust manifold bolts are the most common problem related to the 5.7 Hemi engine. The manifold bolts are one of the hottest parts of the entire engine, which is the main reason why vehicle owners with 5.7 Hemi engines experience broken exhaust manifold bolts. You’ll need to visit a local mechanic to solve this problem.
2. Engine Tick
While engine ticking noise is common in many vehicles, it can be a sign of a problem, especially with the 5.7 Hemi engine. There are multiple reasons why you shouldn’t ignore this.
In the 5.7 Hemi, the engine ticking could be the result of broken or faulty exhaust manifold bolts or seized roller lifter. In any of these cases, you might need to replace your entire engine with the new one.
3. MDS (Multi-Displacement System)
The 5.7 Hemi engine uses MDS technology in order to shut down all four cylinders it has. Not only does the multi-displacement system improve emissions but it can also increase your vehicle’s fuel economy.
However, this system can be a problem for the 5.7 Hemi engine. While it doesn’t show any symptoms on the surface, it can decrease the longevity of the engine because of the deactivation of cylinders.
Keep in mind that the MDS technology was introduced in the 5.7 Hemi engine after 2006. However, it’s not available for vehicles that come with a manual gearbox.
So, if you have a vehicle with a manual gearbox or a Hemi engine manufacturer earlier than 2006, you don’t need to worry about this problem.
4. Poor Emission Control
If you don’t already know, the ECS (Emission Control System) is a vital part of every vehicle engine. It reduces the toxic gas content that your engine releases to the environment.
When the 5.7 Hemi engine was released, it performed very poorly in emission tests. It was perceived as one of the most common problems with this engine.
However, the engine went through some upgrades in 2009 to improve the engine performance, emissions, and fuel economy. So, if you have a 5.7 Hemi engine manufactured after 2009, you won’t face this issue.
5. Oil Leaks
Oil leaks can happen in the 5.7 Hemi engine due to deteriorated engine gaskets. The most common locations for this are under-engine gaskets, valve covers, rear main seal, front main seal, and at the rear of the transmission pan. It is also possible that you have an oil pump leak or timing cover seep.
You need to regularly check your vehicle’s oil level because an oil leak can give you adverse effects in terms of engine performance. You can also have an engine oil pressure gauge installed in your vehicle.
It’ll help you immediately identify if there are any problems so that you can resolve them timely without having too much damage to your 5.7 Hemi engine.
Keep in mind that an oil leak can affect the performance and longevity of other parts of the engine. Along with deteriorated engine gaskets, this problem can also be caused by oil additives.
6. Rough Idle
A rough idle may be due to several reasons, such as faulty spark plugs, clogged air filters, dirty fuel injectors, and a range of exhaust system issues.
If you don’t get this problem fixed right away it can start damaging your engine’s vital components that’ll cost you a whole lot of money. So, if you notice rough idle, take your vehicle to a professional mechanic right away to get it checked.
7. Misfire
No one wants to drive their car with a misfire because this can cause damage to your entire engine. This is one of the most common problems with 5.7 Hemi engines and you can fix it by taking your vehicle to a professional and licensed mechanic.
8. Check Engine Light
This is mostly caused by your car’s emissions system and the O2 sensor. Any other problems related to this light should nag you about a bigger issue with your engine. So, get this problem fixed as soon as you experience it.
Also Read: Best Fender Flares for Ram 1500
Flickr Image by Greg Gjerdingen
Tips to Prevent 5.7 Hemi Problems
For most owners of 5.7 Hemi engines, it is quite discouraging when they see any of the above mentioned problems because.
That’s because these problems can lead to expensive car repairs. If you want to prevent Hemi engine 5.7 problems, consider following the tips listed below.
1. Perform Regular Oil Checks
A dirty engine can cause damage to your vehicle’s engine system so it is advised to check the oil’s color and viscosity regularly. You can also consider switching to synthetic oil if you want to keep your engine clean for a longer time than conventional oil.
2. Never Ignore Check Engine Light
Do not ignore your check engine light because it can be an indicator of several problems with your 5.7 Hemi engine like having too much carbon inside it or even a misfire which can cause bigger damage and repair costs on your car.
3. Change Spark Plugs Timely
Make sure that you change your vehicle’s spark plugs on time or earlier than needed because this can wear down your engine’s parts like piston rings and valve stem seals, which can cause bigger problems in the future.
You should also have your spark plugs checked at least once a year to be sure that they’re working properly.
4. Ensure Clean Fuel
Ideally, you should use clean gasoline or ethanol-free gasoline because this can extend the life of your car’s engine. Plus, it can also prevent damage to your engine that poor quality fuel can cause.
5. Perform Regular Exhaust Check
Never ignore a clunky or crackling sound from your car’s exhaust because this can mean that there are dirt particles or rust inside it. Make sure to have these parts cleaned regularly so you won’t have to spend much on repair costs.
6. Replace Oil Filter, Air Filter, And Fuel Filter Timely
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You should change the oil, air, and fuel filters regularly because dirt can accumulate inside them and can clog your car’s system. This can help prevent 5.7 Hemi problems from happening and keep your engine working optimally.
7. Be Aware of The Signs of Engine Performance Problems
If you see that there are problems with your vehicle’s engine performance, have it checked immediately so you won’t have to pay for expensive repair costs.
You should also consider getting a professional mechanic to look at your 5.7 Hemi engine if the problem persists after you have done all these tips.
This way, you’ll be able to keep your 5.7 Hemi engine in good working condition for a long time.
FAQ’s
1. Is the Dodge 5.7 Hemi reliable?
For dependability, the Hemi family is at the top of its class – with a special nod to the 5.7L version for standing out as especially trustworthy. Even when it comes to performance-focused Hellcat models, you can count on these engines lasting 100K miles or more without any major issues arising.
2. What year did the 5.7 Hemi have cam issues?
If you’re eyeing a 2011 Ram pickup with the renowned 5.7L Hemi engine, be aware – after 100,000 miles it’s susceptible to cam/lifter issues that manifest as a ticking noise behind the dashboard. Have your mechanic give this powerhouse some extra attention before committing to purchase.
3. What is so special about the 5.7 Hemi?
What is so special about a Hemi engine? The Hemi engine’s unique design, which features less surface area, results in less heat loss. This means the engine’s peak pressure can be higher, which can result in better efficiency. Additionally, larger valves mean it’s easier for air to flow through a Hemi engine.
4. Why does the 5.7 Hemi make a ticking noise?
If you’re hearing an unusual ticking noise while your engine is running, there’s a chance something may not be functioning correctly. Left untreated, this could lead to more severe problems down the line due to insufficient lubrication in key areas of the mechanics. Listen up and take precautions against potential damage.
Final Thoughts
5.7 Hemi engines are known for their performance and durability but they have their own set of problems.
We hope this guide has helped you understand the most common 5.7 Hemi engine problems and how to resolve them.
Don’t forget to use the tips discussed above as they’ll increase your 5.7 Hemi engine’s longevity and will help you keep it in good condition.
Related Article – Most Common Dodge 5.7 Hemi Problems
My name is Tom Harris, founder of this blog. I’m a mechanical engineer with 20 years of experience in the automotive industry. I’m here to help you with your vehicle’s problems, easy fixes and share my insights and experience so that you can enjoy your rides more.