Take the 2-minute tour ×
Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It's 100% free, no registration required.

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?

share|improve this question

3 Answers 3

up vote 5 down vote accepted

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

share|improve this answer
    
does this include aluminum radiators? –  BrettAdamsGA Jan 24 '12 at 16:27
    
Aluminum radiators can be welded by someone who knows what's they're doing. –  Timo Geusch Jan 25 '12 at 0:28

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...

share|improve this answer

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

share|improve this answer
    
Seconded. At worst you'll ruin an already-dead radiator, not any other part of the car. I've had luck with this method in the past, although it was a giant gaping hole and I added some radiator stop-leak too after using the JB weld. –  R.. Jan 25 '12 at 5:18

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.