What is a coolant reservoir replacement?

If your vehicle’s coolant reservoir is broken or cracked, you will need to get it replaced with a new reservoir to ensure your engine is cooled properly and works as intended.
Sometimes, your engine’s excess heat can warp your car’s coolant reservoir, necessitating a replacement. However, this is rare.

How is a cooling reservoir replaced?

Your mechanic will take the following steps to replace a broken, cracked, or in some cases, warped, cooling reservoir with a new one:
  • Drain coolant from the damaged reservoir into the proper container, remove coolant recovery cap
  • Disconnect damaged reservoir from all hoses and remove it
  • Install and secure new reservoir and secure hoses with new clamps
  • Refill coolant and purge any air as per manufacturer’s instructions
  • Test new reservoir for proper operation

When do I need to replace my coolant reservoir?

The following are some of the most common signs that your coolant reservoir needs replacing:
  • You notice coolant is leaking onto the ground when your engine is hot
  • Your engine overheats—this is often caused by an airlock that forms when fluid leaks and the air hose has no excess fluid to draw back in (from the reservoir) to the cooling system

How important is a coolant reservoir replacement service?

An intact coolant reservoir prevents airlocks from forming in your car’s cooling system, which can lead to your engine overheating. Therefore, replacing a damaged coolant reservoir is extremely important.


Some tips to keep in mind when trying to determine if your coolant reservoir needs replacing:
  • Engine coolant is extremely hot—never open your vehicle’s coolant system while your engine is still hot
  • When your coolant is being changed out, ask your mechanic to also flush the surge tank out

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