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How to Drain Coolant from Engine Block

March 18, 2024 | Victor Lukasso

This article will walk you through a step-by-step guide to flush or drain Coolant from the Engine Block.

Coolant requires flushing and refilling occasionally to prevent blockage due to the accumulation of dirt or grime in the cooling system.

The draining doesn’t necessarily need the attention of a mechanic, provided you have the necessary tools for it.

Also, most cars don’t necessarily need you to Drain Coolant from the engine Block except when they’ve been inactive for an extended period.


Without wasting much time, let’s see what a Coolant does to a car, how to flush it, and finally refill it with a fresh coolant.

Benefits of Coolants to Engine Block

Engine coolants are unarguably one of the most essential fluids in a car system as they help prevent damage to your car Engine.

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In other words, it helps your car maintain a stable temperature in weather conditions.

It can be called an antifreeze because it ensures the engine’s fluids never freeze or start boiling due to heat.

The advantage extends to preventing rust on metal parts such as the radiator, engine, and heater.

How to Drain Coolant from Engine Block

In most cases, your engine will run perfectly with a Coolant refill; a complete flush is only necessary when a car has parked long on idle.

However, it solely depends on how you use your car and how long it has been used. You can refer to your buyer manual for the proper instructions.

  1. Make sure your Engine and Radiator Cap are cold
  2. Fin0d the coolant drain plug located right beneath the engine
  3. Insert a drain pan or bucket for collecting the old coolant
  4. Remove the hose attached to the radiator for the coolant to pour out
  5. You can also remove the bolt used to tighten the coolant drain plug to flush the system
  6. Once the coolants have been flushed completely, you can now fasten the hose or bolts
  7. Now, refill your coolant and start your engine with the radiator cap off (10 – 30 minutes)
  8. You can now close the radiator while watching out for leaks.
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How to Refill Engine Coolant

Refilling an engine coolant is as easy as fueling your car, but it must be done appropriately.

Here’s a complete guide on how to refill your Engine coolant

  • Raise the hood of your vehicle
  • Find and loosen the reservoir cap, then get a funnel for the refilling
  • You can now top up the coolant or drain it if necessary.

A diluted coolant or a 50% coolant and 50% distilled water combination is recommended for this process.

Finally, tighten the reservoir cap and run your engine.

That’s it.

Why Flush Coolant from Engine Block?

There are a lot of benefits that come with flushing your Engine Block; here are some of them.

  • Flushes dirt or sludge that might have got stuck in the radiator
  • Protects your engine from damage due to increased or decreased temperature.
  • It also helps lubricate moving parts in your car’s cooling system.
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That’s it.

How Long to Let the Engine Cool Before Adding Coolant?

For an easy refilling process, it’s advised to let the engine cool off to a state where it can be touched.

Nevertheless, If you can refill your coolant while the engine is still hot, you can proceed at your own risk.

How simple was the draining process?

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Meet Victor Lukasso, the owner of V. Auto Basics. Through this blog, Victor Provides Insights on the latest tips, maintenance, repair, and techniques in the automotive world.