How to Fix a Blown Head Gasket Without Replacing It

By Jed Lehman •  Updated: 01/24/23 •  3 min read

A blown head gasket can cause serious problems for your vehicle, but replacing it is not the only solution. You can fix a blown head gasket without replacing it by using one of several methods.

Using a Sealant

One method for fixing a blown head gasket without replacement is to use a sealant specifically designed for the job. These sealants are poured into the radiator and circulate through the engine, sealing any leaks in the head gasket.

You will need to purchase a sealant that is designed for head gasket repairs. Once you have the sealant, you can follow the instructions on the package to properly add it to your radiator.

It is important to make sure the engine is cool before adding the sealant, and make sure to follow the instructions of the product you are using. Some sealants may require the engine to be running while others may require the engine to be off.

After adding the sealant, it will circulate through the engine and seal any leaks in the head gasket. It is important to keep an eye on the engine temperature and keep an eye on any leaks after the sealant has been added.

It’s worth noting that this method is often a quick and easy fix, but it may not be a permanent solution and the sealant may have to be reapplied in the future. Additionally, the sealant’s effectiveness may depend on the cause of the blown head gasket.

Using a Compression Repair Kit

Another method is to use a compression repair kit, which includes a sealant and a compressor that forces the sealant into the leaking area. This approach can offer a lasting solution and is more efficient than using a sealant by itself.

Resurfacing the Head Gasket

Resurfacing the head gasket is another method you can employ to fix a blown head gasket without replacing it. This process involves removing any warping or damage from the gasket surface using a machine shop. Once the surface is clean and smooth, a new gasket can be applied and properly torqued down.

It is important to have a professional perform this task, as removing and reinstalling the head requires specialized tools and knowledge. It is also critical to choose a reputable machine shop that has experience with head gasket resurfacing.

Lastly, it is crucial to check the engine for any other damage before resurfacing the head gasket. If there are other issues with the engine, the new gasket may not seal properly, and the repair may fail.

Importance of Proper Diagnosis and Professional Help

Regardless of the method you choose, you must properly diagnose the problem before attempting any repairs. Overheating, poor maintenance, or a worn engine can cause a blown head gasket. Identifying the cause is crucial to prevent it from happening again in the future.

It is essential to note that attempting to fix a blown head gasket without proper knowledge and tools can be dangerous and may cause further damage to the engine. If you are unsure of how to fix a blown head gasket, seek professional help.


To sum up, you can fix a blown head gasket without replacing it by using a sealant, compression repair kit, resurfacing, or a head gasket repair solution. However, a successful repair depends on accurately diagnosing the issue, determining its root cause, and possibly enlisting professional assistance.

Jed Lehman

Jed Lehman is a born gearhead who has been working on cars since he could crawl. He inherited his love for auto from his grandfather who owned a maintenance shop in Carlsbad, California. Jed is the driver behind Gearshift, and started this site to provide straightforward, helpful automobile information. From maintenance tips to product reviews, you can find it all here.