6.6 Duramax Coolant Flow Diagram & Issues To Keep In Mind

You may be wondering where to get a 6.6 Duramax coolant flow diagram.

If you are encountering some coolant issues, then you may want to have a better understanding of why this happens to your vehicle. Moreover, obtaining a copy of the diagram can help you locate the possible cause of the problem 

Now, the Duramax, although it is a fairly reliable vehicle, can also be prone to issues. There are some people out there who complain about coolant concerns. So, we will discuss this – what causes coolant leaks and share with you the 6.6 Duramax coolant flow diagram that may be of help to you.

6.6 duramax coolant flow diagram

Duramax Coolant Issues

While coolant leaks may not appear to be a major issue, it does lead to potentially hazardous conditions for the engine. When you do not have enough antifreeze in your vehicle, this may cause overheating problems to your engine. During the winter, your engine may freeze, which is another serious concern.

Considering the importance of coolant in improving and maintaining the performance of your vehicle, you need to have the coolant level checked as regularly as possible. This is most important for older vehicles that are not as efficient in terms of operation, as compared to newer ones.

If you suspect a leak, the first thing to look into is the floor or the ground where you have parked your vehicle. Because it is not only the type of fluid that can come out from the engine, you need to know for sure what to look for. When it comes to coolant, the color you are looking for is orange or pink, or perhaps bright green. It usually has a sweet smell.

In case you have confirmed that it is indeed a coolant leak, then you need to clean the leak up quickly. This fluid is very toxic for pets and humans.

If you do not notice any fluid on the ground where you have parked your vehicle, the next thing to look for is the temperature gauge. Check if the gauge is showing a significant temperature change. While it is normal to have some mild fluctuations, an adverse increase in temperature means there is a problem with your coolant level. There may be a leak.

So, you need to check your coolant level located in your expansion tank. Fill it up and then check once again if the level has gone down. If so, then you are definitely losing the fluid.

Upon making sure that there is a confirmed leak in coolant, you need to inspect common causes of this issue.

First, there may be a hole in your radiator. All engine parts can endure wear and tear, but corrosion in the radiator can significantly cause damage to this component. This is also the usual reason behind coolant leaks.

When the tubes age and get weaker, there may be dirt and debris inside it. This is responsible for the leak. Additionally, you may have worn out the sealing gasket between your radiator and tank, which also contributes to a leak.

Read More: Duramax DPF Delete Problems – Causes and Solutions

This is why you may need to replace the hoses that are connected to your radiator. This way, you can prevent vulnerable parts from leaks.

The radiator cap is another component to check when you suspect a coolant leak. This is a small part, and yet it performs a critical task. In fact, your radiator is pressurized and what the cap does is to create a secure seal that maintains the right pressure for the cooling system. But over time, the seal may deteriorate and you may have a worn spring that causes the coolant to go out.

Another thing to consider is a blown head gasket. It impacts the performance of your engine, and you may not even be aware of it right away if there is damage to this component. You may be driving for a long time before the problem presents itself.

So, with a head gasket, there is no more separation for the coolant and the engine oil. This is very dangerous and may cause the engine to fail as coolant goes out of the engine and prevents it from getting cool.

Lastly, be sure that your water pump is still in good condition. A faulty water pump can spell out disaster to your vehicle. This helps to ensure the proper circulation of your coolant in the coolant system. There is a belt on the lower portion of the engine, which then connects to the radiator’s lower hose. But there are instances when this hose connection loosens or becomes corroded. In this case, external damage may occur leading to a leak.

No matter what the cause of the problem, when you have a problem with the water pump that prevents the coolant from moving throughout the cooling system, it is highly likely that the engine may overheat.

If you are suspecting problems with coolant leaks, it is best to perform preventative maintenance. You can do this by changing the coolant in your radiator as need be. When you have an older coolant, it tends to get sour and becomes acidic. This then eats away at the radiator’s aluminum components. 

By doing some regular maintenance, this can also help you identify any deteriorating and loose hoses that can result in coolant leaks. 

If you suspect leaks, you may want to check this 6.6 Duramax coolant flow diagram https://static.nhtsa.gov/odi/tsbs/2017/MC-10156994-9999.pdf to help you out. 

Check if the rubber hose in #37 still looks good or has a questionable quality. Moreover, check the clamps on your hose and be sure they are in good condition, as well.

Lastly, a pressure test also helps in locating a leak – or in determining if a leak is bound to happen. Therefore, you can prevent issues from arising or getting worse.

Final Word

Coolant leaks spell out disaster to any vehicle. With the 6.6 Duramax, there are several possible causes of coolant leaks, so it is best to know what these are and use the diagram to check relevant parts and their condition.

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