Blue Devil Engine and Cooling Sealant (32 oz.)

White Shepherd FAQ's:

Q:How does it work?
A:Blue Devil reacts to a temperature differential at the leak point and that acts as a catalyst which allows the chemicals to form a permanent seal.

Q:What does blue devil fix?
A:It permanently seals cooling system leaks, such as radiators, heater cores, and freeze plugs. It also permanently seals most blown head gaskets, cracked heads, warped heads, and cracked blocks.

Q:Do I need to flush the cooling system?
A:YES. Remove the bottom radiator hose and flush the radiator and cooling system using a flushing agent. The radiator must be free-flowing and unrestricted.

Q:Is it safe to use blue devil in my vehicle?
A:YES. Blue Devil is safe to use in all water-cooled systems. It is non-clogging and is 100% chemical. It does not contain any solids or particles that plug up leaks or radiator cores.

Q:How much product do I need?
A:Use 1/2 quart for a 3 gallon cooling capacity, 1 quart for up to a 4.5 gallon cooling capacity, 1-1/2 quarts for 6 gallon cooling capacity, and 2 quarts for up to a 7.5 gallon cooling capacity.

Q:How long will the repair last?
A:Blue Devil is a permanent repair.

Q:My thermostat is hard to reach. Do I really have to remove it?
A:YES. We recommend that Blue Devil be applied to a free flowing system.

Q:Are there any applications where blue devil will not be effective?
A:Blue Devil should not be used to seal seam leaks in radiators or heater cores.

Q:What are the telltale signs of a worn or leaking head gasket?
• A rough-idling engine with large amounts of vapor coming from the tail pipe.
• Loss of coolant without an external leak and carbon deposits inside the tailpipe.
• Bubbles in the radiator.

Q:Does blue devil work on plastic heater cores?
A:YES. It is suitable to repair all types of leaks in all types of cores.

Q:My freeze plugs are the soft type. Will it work on them?
A:YES. Blue Devil will permanently seal leaks in all types of freeze plugs.

Q:Will Blue Devil work on aluminum engines?
A:YES. Blue Devil will bond to all metal types – aluminum, steel, cast iron, even on plastic cores and tanks.

Q:Will this product knock me out of a engine job?
A:NO. The application should be used for those customers who are unwilling or don’t have the money to spend on a car that would not justify the expense.

Q:I tried the product and my radiator has a white crystalline deposit or jell.
A:These are telltale signs of a radiator that is in need of service. When fluids are not changed often enough under severe service or in areas with hard water, scale deposits form in the passages of the core. Sometimes the old fluid will jell or crystallize and can be seen in the system. The radiator core must be replaced or rodded out to bring it up to manufacturer’s specifications.

IMPORTANT NOTE: Blue Devil Engine and Cooling Sealant should not be used on any vehicle that cannot maintain an idle for at least 40 minutes without having to add coolant from over heating. It is not recommended for leaks that result from a busted seam.

*Not Recomemded For Vehicle's With Northstar Engines*