Does K-Seal Really Work? Head Gasket Leak Test

TLDRWe test K-Seal Ultimate to see if it can seal a head gasket leak in a Subaru Forester. Unfortunately, it doesn't fare much better than Blue Devil, and both products prove to be a waste of time and money.

Key insights

💧K-Seal Ultimate fails to seal a head gasket leak in a Subaru Forester, just like Blue Devil.

👨‍🔧Replacing the head gasket and getting the heads machined is the proper way to fix a head gasket leak.

💸Head gasket miracle cures in a bottle are nothing more than snake oil and a waste of money.

K-Seal claims to seal within 3-5 minutes, but it takes much longer, if at all.

🌡️Bubbling in the cooling system indicates the presence of combustion gases, suggesting a head gasket leak.

Q&A

Can K-Seal fix a head gasket leak?

No, K-Seal fails to seal a head gasket leak effectively.

What is the best way to fix a head gasket leak?

The proper way to fix a head gasket leak is to replace the head gasket and get the heads machined.

Are head gasket miracle cures in a bottle effective?

No, head gasket miracle cures in a bottle, like K-Seal and Blue Devil, are a waste of time and money.

How long does K-Seal take to work?

K-Seal claims to seal within 3-5 minutes, but it may take much longer, if at all.

What does bubbling in the cooling system indicate?

Bubbling in the cooling system indicates the presence of combustion gases, suggesting a head gasket leak.

Timestamped Summary

00:00In this video, we test the effectiveness of K-Seal Ultimate in sealing a head gasket leak in a Subaru Forester.

07:11After running the car for 34 minutes, the K-Seal does not completely seal the head gasket leak, just like Blue Devil.

08:22Head gasket miracle cures in a bottle, like K-Seal and Blue Devil, are ineffective and a waste of money.

09:13The proper way to fix a head gasket leak is to replace the head gasket and get the heads machined.