How to Clean Engine Block Water Passages?


As long as the cooling system of the can engine is concerned, the water passage is quite an important part of it. It plays the role of letting the coolant water pass through it. And there is no way that the system will run fine is this channel blocked. 

Over regular uses of the car engine, the unexpected incident takes place anyhow. Yeah, we are talking about rust or mineral buildups on the water passage, and eventually a troublesome water passing system.

As you have landed on this web page, we assume that you are affected by this same problem. If so, it’s good news for you that we have covered up the entire topic in this post. 

Go through the detailed explanation of how such blockage on the water passage takes place, and how to overcome the situation. 

Why Cleaning Engine Block Water Passages Is Important?

There are several answers to why it’s important to keep the water passage clean of your car engine block. And in case you are not aware of it, this section is for you. 

Before that, let us tell you the main reason why it gets blocks. Here are two of the major reasons for it- 

Mineral Rich Water

It’s not always the river-standard that people get to use. In case you are in a river-side or sea-side city, the water you use might be high and rich in minerals. 

In case that happens, over usage of that water will create a mineral and iron buildup on the car engine water passage of the cooling system. In every six months of use, this buildup gets too thin to let water pass through it swiftly. 

So, that is one regular reason for water passage blocking. 

Rust Buildup

The next big reason of why there create blocks onto the water passage of the car is- the rust buildup. 

We know that every part of the cooling system and the water passage contains layers of coats that protect them from rust buildup. But in case you don’t change it once in a few years, that protective layer will wear out eventually. 

Result? Rust buildup on the metal surface of water passage. Eventually, it becomes troublesome for the water to pass through the channel. 

Either way, it’s super important to clean off this blocked water passage anyways. And this is the issue we are also concerned in this article. In the next section, we have provided some real actionable tips along with a list of materials you need for the process. 

Steps on How to Clean Engine Block Water Passages

Alright, we are at the core of this article. Before letting you know the steps, here is the list of essential items you need for the process- 

Items You Need

  • Detergent to use on the car engine. 
  • A crank stand. 
  • A nylon brush with hard teeth. 
  • A lantern. 
  • Hosepipe or pressure washer. 

Got all the essentials in hand? Here are the steps- 

Step 1: 

Take the engine block stand, and make sure that it supports the engine block. In this way, you will get to visualize the entire engine block and proceed with the next steps. You need to have a closer look at the insider parts of the water passage, so make sure that it’s spacious enough to let your vision in. 

Also, if there are any places or corners that are inaccessible, you might have some adjustment of your body to access to those places. Also, keep the lantern or torchlight in hand, as they will show you the path the passage. 

Step 2: 

Identify the water passage of the engine block and the degreaser or grease eater into the passage. Before starting the actions, you are supposed to prepare the degreaser solution by mixing it up with water. 

For preparing the solution, make sure that you have followed the steps mentioned in the user’s guide of the degreaser. Don’t take too strong of a degreaser or too weak either. Make sure that it’s as per the standard of your car. 

Step 3: 

Leave the degreaser into the water passage for a few minutes. This will make the degreaser work effectively on the grease or dirt buildup into the passage. 

Once done, proceed to the next step. 

Step 4: 

Now, you would be needing the nylon brush that was in the equipment list. Make sure that that teeth of the brush are hard and long enough to reach the nooks and corners of the water passage. 

Keeping the degreaser inside, rub the water passage walls with the brush. Make sure that you have applied this action on the areas that contain the most amount of dirt and grease. 

Once done, take the degreaser out, and do it again for the spaces remaining. Once the degreaser is out, it will expose some more parts of the dirt and grease buildups. 

Step 5: 

Once you are done with cleaning the water passage with the nylon brush, it’s time to rinse it with water. Now, you might ask why this rinsing is important. 

Well, after using the nylon brush, there will be many loosen up microparticles of rust and grease. Pouring it with clean, fresh water, these microparticles and dirt will come out. 

Once you are done several risning in the same method, put the water passage back on its place. Make sure that you’ve assembled it in a correct way. 

Once done, we are done with the process of cleaning water passage as well. 

Bottom Line

So, that was the list of steps that you need to go through for having a new-like water passage. As an important part of the cooling system, having a cleaned up water passage is important. And we hope that you will be careful enough on this concern. 

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