The engine bay is not usually the first thing you think of when cleaning your car. Many people forget to clean the engine block and engine bay from time to time. In this blog about cleaning the engine bay, we explain how to clean your engine block quickly and safely, which products you need, and why it is worth spending time on this part of your car.
Why clean the engine bay?
As mentioned, many people skip the engine bay during a car cleaning session. Water on an engine block with cables nearby — is that safe? Could it damage anything? Could the car break down? These are common questions, and they often make people avoid the job altogether.
Many people also assume it is unnecessary. After all, who cleans an engine bay? Here are a few good reasons to do it:
- The engine bay will look like new again.
- It helps extend the lifespan of the engine block and its components.
- Cleaning and maintaining the engine bay helps reduce corrosion and deposits.
- It is quicker and easier than most people think.
- Cleaning your engine block takes less than 20 minutes.
How to clean the engine bay in seven steps
A clean engine bay is a great finishing touch for any detailer. Yet there is one thing that seems to stop most people from cleaning it: fear.
In recent years, cars and engines have continued to develop, and engine bays and components are now much better protected. This makes cleaning the engine bay much safer than it used to be, when many parts were still exposed.
If you follow the seven steps below, your engine block and engine bay will look like new again. Let’s get started.
Step 1: Inspect and protect
Always make sure the engine bay, including the engine block, is cool before you start. Begin the cleaning process with a thorough inspection of the engine bay.
Some older vehicles have little or no protection around the electrical components. These cars may not be suitable for the full cleaning process described below. In those cases, an effective alternative is to spray a small amount of all-purpose cleaner directly onto a microfibre cloth and work it into the surface to remove dirt.
This method is also useful for freshening up engines that only have light contamination. Modified vehicles often use an open cone air filter for performance tuning. This type of filter should not get wet, so it must be protected with plastic sheeting or wrapped completely before cleaning.
Step 2: Pre-rinse the engine bay
Now you are ready to start cleaning. You can use a pressure washer, as it is important to remove loose dirt and debris first. Pre-rinsing is an important step before cleaning the engine block.
However, it is essential that you do not spray water directly onto exposed electrical parts, cables, fuse boxes, the battery or the alternator. These areas are usually protected, but you should still be careful when aiming the pressure washer.
Tip: Do not forget the underside of the bonnet. Dirty areas here are often overlooked.
Step 3: Clean the engine bay with an all-purpose cleaner
As always, start at the top and work your way down. An all-purpose cleaner is ideal for areas such as the underside of the bonnet and dirty panels.
Spray the product generously, work it in with a detailing brush or microfibre cloth, and rinse away the dirt.
Step 4: Deep clean and degrease with an all-purpose cleaner
If you want to clean the engine block thoroughly, an all-purpose cleaner is the best choice. One of the main advantages of this versatile engine cleaner is that it works effectively and is suitable for all kinds of surfaces, from plastics and rubbers to bare metal and painted areas.
Apply the product generously across the entire engine bay and allow it to dwell for a few minutes. This gives the cleaner time to loosen even stubborn dirt.
In short, an all-purpose cleaner is highly suitable for cleaning the engine bay. For this type of tougher contamination, we recommend a dilution ratio of 1:10.
Step 5: Agitate with a brush or microfibre cloth
Detailing is the next stage. This gives the all-purpose cleaner even more cleaning power and helps remove stubborn contamination.
All you need is a detailing brush or cloth. Gently work the product into all areas under the bonnet. You will see it foam up, giving it strong cleaning performance. This is where you physically loosen dirt, grease and oil from the surfaces.
Step 6: Rinse again
Once all areas have been brushed, you can move on to the final rinse. At this point, the dirt has already been loosened from the surfaces.
Carefully rinse the engine bay with a pressure washer. Again, be mindful of sensitive components.
Step 7: Finish with a microfibre cloth
Your engine bay should now be spotlessly clean. The best finishing step is to dry it with a microfibre cloth.
Dry it thoroughly, and you are done: one spotless engine bay, using only three products, in less than 20 minutes.
Products for cleaning the engine bay
Have you completed all seven steps? Then your engine bay has been thoroughly cleaned and should look like new again.
