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JB Weld Aluminum Radiator 101: What You Need to Know

Radiator Hose Failure

The JB Weld aluminum radiator solution is one of the best welding solutions available. Combined with alcohol that serves as a thinner it can be poured into the parts of the radiator that have been damaged. With the welded area heated by a simple household tool like a hair dryer.

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The Weld aluminum radiator plastic tank and radiator repair kit can be used for temporary repairs, and even for permanent repairs for both plastic and metal radiators. It can also be used as protection for plastic liquid storage containers from leaks caused by cracks. The crack however should be 4″ or less and the holes up to 1/4″ in diameter. 


Also this repair kit is not recommended to be used for plastic repairs or for use with polyethylene or polypropylene parts that are plastic. The JB Weld Aluminum Radiator repair kit is great not only for radiators but also for wash fluid tanks and storage tanks. It’s for automotive, metal, plastic/composite/PVC use and more. Welding aluminum radiators is difficult, and epoxy like JB weld aluminum radiator solution is a cost-effective method of repairing them.

JB Weld Aluminum Radiator: Some Basics on Radiators


A radiator is a very important component of your car’s cooling system. The combustion process is used by your car's engine. Explosions are caused by combustion. Explosions indicate the presence of heat. Your automobile must generate a lot of heat in order to transport you around town.


Without a cooling system, engine combustion quickly raises engine temperatures, producing problems when it becomes too hot. The radiator is one automotive component you don't want to have problems with, especially in the middle of summer.


Functions of Radiator


The radiator distributes heat from the fluid within to the air outside, cooling the fluid and thereby cooling the engine. Radiators are also frequently used to cool automatic transmission fluids, air conditioner refrigerant, intake air, and, in rare cases, engine oil or power steering fluid.


Parts of a Radiator


The radiator in your automobile may be found beneath the hood, adjacent to the engine. Radiators come in a variety of styles and designs, but they all have the same basic components.


Coolant – the fluid that conducts heat away from the engine, gearbox, and radiator Coolants can be either gaseous or liquid in nature. Most newer automobiles, on the other hand, utilize liquid coolant.


A Core – consisting of a metal block with tiny metal fins that transmit heat from the heated coolant passing through them into the air


Pressure Cap – a cover that shuts off the radiator and increases pressure inside the radiator, ultimately raising the boiling point of the coolant


Outlet/Inlet Tubes – the coolant enters and exits the radiator and engine at this point.


The Common Types of Radiators


Although most modern radiators are composed of aluminum, the most prevalent radiator materials are aluminum and copper. Because of its low weight and great heat dissipation, aluminum is the recommended alloy. Some automotive radiators are a mix of metals.


An automobile radiator, for example, may have an aluminum core with different alloys making up the rest of the radiator. Brass and lead are two other radiator materials, though they are not often utilized. When brass and lead are used, they are usually in conjunction with aluminum.


Aluminum radiators are also more durable and lighter than copper or brass radiators. Aluminum radiators can have a smaller core and larger tubes, which allows for improved air and coolant movement through the radiator.


The Difference Between Stock and Aftermarket Radiators


The difference between factory and aftermarket radiators is not intrinsic. However, depending on the metal type and capacity, an aftermarket radiator may be better able to handle high-performance applications. As with other aftermarket items, aftermarket radiators are less expensive.


Some people feel that aftermarket components are of inferior quality than OEM (original equipment manufacturer) components, although this is not always the case. Aside from cost, one may opt to add an aftermarket radiator if the standard radiator is inadequate for the vehicle's purpose, such as in car racing.


Things Worth Noting When Doing Aluminum Radiator Repair:


Aluminum radiators can fail in the same way as copper and brass radiators do. We'll go over some simple maintenance actions you can do to help avoid aluminum radiator leaks in your car. We'll then go through a few steps you may take to aid conduct an aluminum radiator repair if a leak should occur.


Aluminum radiator repair is more difficult than copper brass radiator repair. To repair most copper and brass radiators, all that is required is a clean surface and some solder. However, for an aluminum radiator repair, you'll need gaskets, epoxy, aluminum welding, various plastics, nylon, and crimping equipment. 


A common feature of aluminum radiators is an epoxy seal around the tubes where they enter the header. This epoxy can sometimes break or lift off the header, causing a leak to form. In situations like these, the radiator should most likely be replaced. It is quite difficult to stop a radiator epoxy leak that is a tube-to-header leak.


There is a gasket between the plastic tank and the radiator's aluminum core. The radiator tank is crimped into this gasket, and coolant can occasionally leak out. This sort of aluminum radiator leak is rather frequent, and you may attempt a little stop leak to see if it helps. If the stop leak does not work, you can try a DIY Repair with a pair of vice grips.


Another fairly typical issue is seen on the radiator's plastic tank, generally at the back of the input tank, immediately behind the hose connection coming from the engine. The intake tank on your radiator is the hottest area, and the continual heat striking the back of the tank can cause the plastic to deteriorate and shatter. If you're a do-it-yourselfer, repairing a radiator crack in this position is usually not a good idea. Changing the tank or purchasing a whole new radiator is your best bet. 


The issue here is not to overtighten the crimp, since this might exacerbate the leak. Make sure you have even pressure all the way around the tank, then set the vice grip to a certain gap and maintain it the same all the way around. Place the vice grip on the crimp and press close, squeezing the plastic tank. This should appropriately position the tank on the gasket. If done correctly, a clean hole in an aluminum radiator may be repaired. This repair can be attempted in a variety of ways and one method is the use of JB weld aluminum radiator repair kit.


How to Use JB Weld Aluminum Radiator Repair Kit


Repairing an aluminum radiator might be a difficult process, but you can do it yourself with radiator epoxy like JB Weld Aluminum Radiator repair kit. Here are some steps that will hopefully make the process easier for you:

  • Your first step to repair the leak is to make sure the car is switched off and cools down completely. 


This first step relieves some of the pressure. Remove anything that is in your way so that you can easily reach the leak. Removing the radiator completely can help you work on it more effectively, but it can be challenging. With older model automobiles you should have little trouble removing the radiator, but current vehicles will almost certainly require the services of a professional.

  • Secondly, find the leak or the source of the problem. 


What to look out for if you suspect a radiator leak is a water-like leak under the automobile since it would be the most visible. Because your vehicle has a variety of substances that may leak, ensure that it is coolant and not merely water.

  • After spotting the leak, drain your radiator until just below the damaged or the cracked area. 

  • After draining, you can proceed by cleaning the area with the use of a brake cleaner. 


Before applying the epoxy, the surface must be totally clean. Otherwise, the epoxy will not bind, and the leak will continue. You can also sand the surrounding surface to improve the bonding activity of the epoxy. Allow enough time for everything to dry thoroughly. Any wetness will also have an effect on the epoxy's bonding. Prepare your epoxy for application to the leak after it has dried.


How to Clean the Radiator from the Inside Out


First and foremost, the radiator must be cleaned from the inside. Oil, grease, and antifreeze must all be cleaned from the inside of the damaged radiator. The interior of the radiator may be cleaned with alcohol. After emptying the coolant, pour the alcohol into the radiator. The radiator must then be rotated so that the alcohol can reach the damaged region and clean it from the inside.


How to Clean The Radiator from the Outside


After cleaning the interior, the damaged area must be washed from the outside with alcohol and then sprayed with a non-flammable brake cleaner to remove any oils. This must be completed prior to applying the adhesives to the surface.

  • Tape the part that is least damaged.


The radiator's side with the least damage must be chosen and taped over. The tape should be applied to a much bigger area than the one that is damaged. A pair of needle-nosed pliers is required to pry the damaged fins away from the damaged tubes. If feasible, the ends of the tubes must be crimped.

  • Prepare the Solution.


The radiator must be positioned with the taped side facing down. The JB Weld aluminum radiator patch's solution should then be prepped. 

  • Use The JB Weld solution.


Again, the welding solution has to be mixed with alcohol that will act as a thinner. The patch mixture then will be poured into the damaged parts of the radiator. Put heat on the welded area. You may use the help of a hair dryer.

  • Dry The Patch.


If the repair job is being done in a chilly area, the patch will need to be dried using a hairdryer. This should be done until the patch sets and hardens.

  • Plug the outlets.


There are two ways to accomplish this. To block the outlets, use a testing radiator cap and pressurize the radiator to a pressure of no more than 25 psi. Two radiator caps can also be used to plug the outlets. A vacuum must be generated using a hand squeeze pump. If the vacuum remains after 2 to 3 hours, the aluminum radiator has been fixed.

  • Clean the radiator and put it back in place.


After properly inspecting the aluminum radiator, it must be cleaned to remove any excess adhesive or oil. After everything has been completed correctly, the aluminum radiator must be reinstalled.


JB Weld Aluminum Radiator: Related Questions


What JB Weld is best for aluminum?


J-B WaterWeld epoxy is a watertight putty. Because of this property, WaterWeld is a highly strong adhesive for gluing aluminum pieces together. It can endure temperatures of up to 300°F (148.8°C) and has a tensile strength of 1300 PSI. The WaterWeld comes in the form of a stick.


Is JB Weld antifreeze resistant?


When exposed to antifreeze, the JB Weld will hold up just fine.


Is JB Weld good for aluminum?


Except for lead, J-B Weld works on aluminum or ANY metal surface. JB Weld is effective on aluminum. If you believe you might wish to separate the pieces in the future, use a mechanical fastener.


Is JB Weld stronger than welding?


The Original JB Weld Aluminum Radiator Cold Weld two-part epoxy system was especially made as an alternative to welding using a torch. J-B Weld Original forms a connection stronger than steel and delivers robust, long-lasting repairs to a variety of surfaces.


Radiators, like any other vehicle component, are prone to deterioration, which can result in high radiator repair expenses. Because the cooling system is critical to the health of your vehicle, it is best to fix it yourself or have an auto professional repair it as soon as possible if there is a problem. If applicable the use of JB Weld Aluminum radiator kit can be cost saving, you just have to know how to do it right.

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