When you buy a new car, particularly from a trusted brand like Mitsubishi, you don’t usually expect to run into many issues for the first 5 years. The car runs smoothly, there are no breakdowns, and you don’t need to worry about frequent repairs. However, as your car ages and the mileage goes beyond 100,000 miles, you might start facing a few challenges. That’s when you’ll either need to spend a significant amount of money on repairs or, ideally, start learning a bit more about how car repairs work. I’m not suggesting you need to become an expert mechanic, but understanding the basics will definitely help you avoid being taken advantage of by less-than-reputable repair specialists.
In this post, I’d like to talk about an essential product designed to help your engine stay in top shape, especially after it reaches high mileage. It’s a special fluid developed by Mitsubishi, but it’s suitable for all car engines. This product is the Mitsubishi Shumma Engine Conditioner—a magic liquid for cleaning your engine and keeping it running smoothly for longer.
What is Engine Decarbonisation?
Before diving into the specifics of the Mitsubishi Shumma Engine Conditioner, let's first talk about the engine cleaning procedure it supports—engine decarbonisation.
Over time, carbon deposits build up in the combustion chamber, piston rings, pistons, and valves. This buildup is often caused by using low-quality fuel or oil. The deposits create a layer of carbon, which interferes with the engine’s smooth functioning. In severe cases, valves can even burn out, and the piston rings become coked and cease to move as they should. The combustion chamber also gets clogged, which reduces heat dissipation, leading to overheating. As a result, engine power decreases, you might hear knocking noises, and exhaust smoke (especially black smoke) could increase. If the engine continues to run in this state, it can cause significant wear and tear on cylinders, pistons, and rings.
Signs You Might Need Engine Decarbonization
You should consider decarbonizing your engine if you notice any of the following signs:
- The engine starts making unusual noises and vibrating.
- Fuel consumption has increased.
- The engine is consuming too much oil.
- Engine power has decreased, and acceleration feels sluggish.
- Excessive smoke from the exhaust pipe.
- Starting the engine has become difficult, despite the battery being fine.
- A mechanic recommends a major engine overhaul (capremont).
The Benefits of Engine Decarbonisation
Mitsubishi’s Shumma Engine Conditioner is designed to address these issues without requiring a complete engine overhaul. In fact, in about 70% of cases, this simple procedure will improve engine performance, reduce oil consumption, and eliminate the need for an expensive engine rebuild.
How Does the Mitsubishi Shumma Engine Conditioner Work?
The Mitsubishi Shumma Engine Conditioner is a specialized fluid that helps break down the carbon buildup in your engine. The process is straightforward, doesn’t require dismantling the engine, and can be done at home if you follow the steps carefully. The main ingredients in the conditioner include petroleum-based solvents and active substances that help to break down carbon and other deposits that clog engine components.
Step-by-Step Guide to Using Mitsubishi Shumma Engine Conditioner:
1. Preparation
- Make sure you’re in a well-ventilated area (preferably outdoors or in a garage with good airflow).
- Disconnect the battery to avoid any electrical issues.
- Remove the engine cover, ignition coils, and spark plug caps.
- Unscrew the spark plugs.
2. Applying the Engine Conditioner
- Using a special straw (included with the product), carefully inject the Mitsubishi Shumma Engine Conditioner into the spark plug wells. Aim for about 5 seconds of spray into each well. The included straw might be too short for some engines, so I recommend finding a longer one if necessary.
- Once you've sprayed all the wells, let the engine sit for 30 minutes to an hour. During this time, cover the cylinders to prevent any debris from falling in.
3. Repeating the Procedure
- After the waiting period, repeat the spraying process. Let the solution sit for another 15-30 minutes.
4. Removing Excess Fluid
- Use a syringe with a long tube to extract any leftover fluid and carbon buildup from the spark plug wells.
5. Crank the Engine
- Disconnect the crankshaft position sensor (located near the generator on the left side of the engine bay).
- Cover the spark plug wells to prevent any fluid from splashing.
- Crank the engine a few times (for 10-15 seconds) to allow the conditioner to work through the engine.
6. Reinstalling Parts and Testing
- If you’re using old spark plugs, you can soak them in the conditioner for an even better effect.
- Reinstall the spark plugs and all parts in reverse order.
- Start the engine. You may notice some white smoke coming out of the exhaust, which is normal and will dissipate shortly.
- Finally, change the oil in your engine, either immediately or after a few days, to remove any remaining contaminants.
What to Expect After Using Mitsubishi Shumma Engine Conditioner?
Once the procedure is completed, you should notice the following improvements:
- Reduced fuel consumption.
- Faster engine warm-up.
- Less engine vibration.
- Less exhaust smoke.
- Overall improvement in engine performance and power.
When Should You Perform Engine Decarbonization?
The ideal time to perform this procedure is not when you're facing major engine problems (like needing a complete overhaul), but rather as a preventive measure every 80,000 to 100,000 miles. It’s much easier and cheaper to maintain your engine in good condition rather than wait until it's too late and costly repairs are required.
Conclusion: The Importance of Preventive Maintenance
Using Mitsubishi Shumma Engine Conditioner for decarbonizing your engine is an effective way to maintain your car's health and prevent major issues. While it’s not a substitute for proper maintenance, it can save you a significant amount of money by extending the life of your engine and avoiding unnecessary repairs. If you've used this product, I’d love to hear about your experience in the comments below. If not, I highly recommend giving it a try and adding this simple procedure to your regular maintenance routine.
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