How to keep your engine bay in top condition

5 min read
Published on
November 13, 2023
Image shows a man's hand with a cloth in it, cleaning his car's engine bay
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Cleaning & maintaining your engine bay

At BIG Warranties, we understand the importance of keeping your car in tip-top condition. A clean and well-maintained engine bay not only enhances the overall appearance of your vehicle but also contributes to its longevity and performance. Our experts at BIG Warranties are here to take you through the steps to clean your car's engine bay, ensuring it remains in top shape for years to come. So, let's roll up our sleeves and get stuck in to give your car's engine a well-deserved clean.


Safety first

Before diving into the cleaning process, it's essential to prioritize safety. Here are a few safety precautions to keep in mind:

Disconnect the battery: To avoid any electrical mishaps, disconnect the negative terminal of your car battery. This will ensure that you don't accidentally trigger any electronic components while cleaning.

Work on a cold engine: Never attempt to clean a hot engine bay, as sudden temperature changes can damage sensitive components.

Wear appropriate gear: Protect yourself with safety goggles, gloves, and an apron to shield your clothing from cleaning chemicals.

Ventilation: Choose a well-ventilated area to work in, as some cleaning products can produce fumes.


Gather your supplies

To clean your car's engine bay effectively, you'll need the following supplies:

Degreaser: Choose a high-quality engine degreaser to break down dirt, oil, and grime.

Brushes: Invest in a set of soft-bristle brushes, including a toothbrush-sized one for intricate areas.

Waterproof cover: Cover sensitive electronic components such as the air intake, battery, and fuse box with plastic bags secured with tape.

Hose and nozzle: You'll need a hose with a spray nozzle for rinsing.

Bucket: Fill it with soapy water for cleaning brushes.

Microfiber towels: For drying and detailing.

Step-by-step guide to cleaning your engine bay

Now, let's get down to the nitty-gritty of cleaning your car's engine bay:

1. Preparation

a. Park your car in a cool, shaded area.

b. Disconnect the negative terminal of the battery.

c. Cover sensitive components with plastic bags.

2. Degreasing

a. Spray the engine degreaser generously over the entire engine bay.

b. Pay extra attention to areas with heavy grease build up, such as the engine block, transmission, and surrounding components.

c. Allow the degreaser to sit for about 5-10 minutes, or asper the product instructions.

3. Agitation

a. Use your soft-bristle brushes to agitate the degreaser. Scrub gently to avoid damaging any surfaces.

b. Focus on tight spaces and crevices where dirt tends to accumulate.

4. Rinsing

a. Use a hose with a gentle spray nozzle to rinse the engine bay thoroughly. Be cautious not to use high-pressure jets, as they can force water into sensitive areas.

5. Drying

a. After rinsing, use microfiber towels to blot and dry the engine bay. Make sure to reach all areas to prevent water spots.

6. Detailing

a. Once dry, remove the plastic covers from sensitive components.

b. Apply a plastic or rubber conditioner to keep hoses and seals in good condition.

c. For added shine, you can use an engine bay dressing. Make sure it's compatible with your specific engine components.

7. Reconnect Battery

a. Reconnect the negative terminal of the battery.


Cleaning your car's engine bay is an essential maintenance task that can enhance the longevity and performance of your vehicle. By following these steps and prioritizing safety, you can keep your engine bay in pristine condition, ensuring your car runs smoothly for years to come.

Remember that regular maintenance, including engine bay cleaning, can be a valuable addition to your car care routine. And, if you ever encounter unexpected issues, don't forget to reach out to BIG Warranties for peace of mind and protection for your vehicle with our motor breakdown cover!

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