Is Blue Devil good for head gasket?

1. Does BlueDevil head gasket sealer actually work? Yes. The BlueDevil head gasket sealer works to seal cracks and leaks that cause damage to your engine.

How long does Bar’s leak head gasket last?

It depends. If the leak is mild to moderate, we’ve had customers run 10,000-50,000 miles with no further issues. If the leak is more severe, or on the edge of becoming severe, the repair might last a shorter duration. The advice we always give is to act at the first sign/symptom of a cooling system problem.

Is it safe to use bars leak?

When you carefully follow the instructions for our engine, radiator or other stop leak products, there is no risk of damage. Always remember these points: Bar’s Leaks stop leak products work for small to moderate leaks.

Can you use too much BlueDevil?

They may, for example, add some sort of “silt” to the coolant system which is deposited around the system. Adding too much of this is enough to cause blockages in heater matrixs and radiators.

How many times can you use Blue Devil head gasket sealer?

Yes. You can use the blue devil head gasket sealer more than once. This product does not contain petroleum distillates, so you might use it more than once if a leak occurs after the last time you used it. You only need to follow the directions to the letter when applying it.

How do you get Blue Devils out of your engine?

I blasted air through each hose with the air compressor (shooting it out of the top of the radiator), filled with water and blasted it again over and over until it came out clear. I also ran air through my heater core in both directions while the hoses were off.

How good is BlueDevil?

Engine runs great, there are no misfires, no loss of coolant, no excess pressure and there is ample heat from the heater core with the car at idle. So at this point, problem is 100% fixed. Blue Devil did the job as advertised and I’m a happy customer so far.