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Replace the radiator cap and start the engine. The leak will seal as the sealant makes its way through your coolant system. This method is not as permanent as professional radiator repair or an epoxy, but will suffice to seal small leaks until more permanent repairs can be made.
Similarly, you may ask, how much does it cost to fix a radiator leak?
Overall, you could pay $400 or more for this repair. Replacing a radiator hose is a quick and easy fix and will only run you $35 to $65 for the entire repair. A radiator replacement cost around $300 or more, depending on the size and type of your car. Don't delay when you find a coolant leak.
Likewise, people ask, what size hole will stop a radiator leak?
The product can repair holes of up to 0.635mm in size but won't block any passageways or tubes within the cooling system. The K-Seal antifreeze stop leak formula will form an extremely strong and permanent seal that is guaranteed professional results.
If it is beyond repair, standard radiator replacement cost ranges between $292 and $1193 for both the parts and labor involved in the installation. The average cost for radiator replacement will be near $671. The cost will vary significantly depending on your model of car and the complexity of the work involved.