yes it will it will solve all leeks in your cooling system and best of all if your cillinder head should ever crack it will fix the problem and keep your car going strong
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Yes Holts Radweld Plus can be used for sealing a leak within the heater matrix, provided the leak is not too severe. The way the product works is it stays in solution (basically in a liquid form) while in the coolant system, the system circulates it around and when it finds the hole it uses the pressure of the system to leak through this hole. Now when it is exposed to air/the atmosphere on the other side and it has the heat of the engine behind it, it is able to form a seal over the hole. The rest of the Radweld not involved with this seal will still stay in solution inside the system until the system is flushed/drained.
As the leak is in the heater matrix section, it is likely that you will need something like a 20-30 min drive with the cars interior cabin heaters turned on in order to open up the heater matrix side of the system and allow the Radweld solution in to find and seal the leak. If the leak is not sealed during this period, the engine may need to be run for longer as the temperature around the leak site or lack of flow of Radweld to the leak site are the causes of it not being able to seal the leak.
Of course during the drive we would recommend keeping an eye on the temperature of the system as well as the level of coolant in the system, especially if it is a severe leak which could lead to the system emptying and then overheating before Radweld is able to fix the problem.
answered 5 years, 1 month ago