Is there a reliable way to repair a pin hole leak in a radiator

Question

I have heard a few different ways to fix a pin hole leak in a radiator. I have heard put a small amount of black pepper in the radiator, or use jb weld to patch the hole, and not to use the stop leak antifreeze.

Any suggestions?

leak radiator

Any suggestions?

Nick · Accepted Answer

If you are willing to drain the coolant, most radiators can be brazed or welded to fix pinholes.

Brian Knoblauch · Answer

If I didn't really care if I might hurt the car, I might be willing to try JB Weld...

R.. GitHub STOP HELPING ICE · Answer

I've fixed radiators in the past, but unless your car is one where the replacement radiator is really expensive, you're probably better off just replacing it. A new radiator will usually give much better cooling performance. Last time I replaced a radiator is was just $70 or so...

Answered by R.. GitHub STOP HELPING ICE on June 30, 2021

Woafmann · Answer

Many years ago, I brazed my non-aluminum, non-plastic radiator pin hole shut with a metal coat hanger and disposable propane hand torch. Never had a problem again with that radiator and it lasted for many years.
Otherwise, scrubbing with acetone and using JB Weld "Extreme Heat" and a piece of metal flashing might be worth a try (follow safety procedures).

Is there a reliable way to repair a pin hole leak in a radiator

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