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If you run diesels—especially in trucks, generators, or heavy equipment—you know heat is the enemy.

These Brock heat tabs are a simple way to see if things got too hot.

You get two tabs in the pack, plus high heat adhesive to stick them right on the engine or component.

Each tab is calibrated to melt at a specific temperature if it's exceeded.
When you check later, you'll know instantly if you had an overheat event.
It's a cheap insurance policy for your engine.
Brock is a solid brand for this stuff.

They come with a 1-year limited warranty.
The part numbers are ADS3957 and ADS3953.

They're not universal, so make sure they're right for your application.
They're about 16 inches long, 12 wide, and weigh a pound.
Just stick 'em on and forget 'em until you need to know.

4.5 out of 5