treh1

My 58 has the original Harrison radiator that surprisingly keeps the engine very cool. I have a couple very small pinhole leaks that weep coolant and drip down and collect on the lower fan shield. It's never a large amount of coolant but I'd like to somehow fix it. I've tried a skim coat of JBWeld on a couple occasions but that doesn't last. Any ideas, like pepper or Bar Leaks? I know at some point I'll replace it with a DeWitts but is there any decent fix that I can implement for now?

67vetteal

Years ago we never hesitated to add Bars Leak Sealer to a porous Radiator. You have nothing to lose so why not? Al W.

65 vette dude

Bars Leak 1186 will take care of your problem

Jhemp3

It worked for me. '62

treh1

Which radiator sealant did you use? Any concerns with choking off any of the coolant passages in the engine block?

wraplock

I am not a fan of stop leak products. If it goes into your radiator it will also go into your engine block and I don't want anything but coolant in my engine block. Pull it out and take it to a radiator shop to have the core cleaned and repaired. You will probably find several more pin holes when they clean it.

warrenmj

It's 57 years old! Consider it a blessing it lasted this long. If you plan on replacing with a DeWitts anyway, why not just do it now and then you won't have to worry about it.

Jhemp3

Sorry, don't recall. However, it was a two part treatment. I also agree with getting it fixed right. I was on my way to Cruising the Coast and didn't have time. In process now of doing it right. (It worked well in 2 mph, stop and go for six days.)
Some say our aluminum Harrison's can't be repaired???
Jim

jim lockwood

The one and only time a mechanic added stop leak (without my knowledge) to the brass radiator of one of my cars, it plugged up enough of the radiator that the engine started running hot. There were areas near the top of the radiator which remained stone cold.

Take the radiator to a competent repair shop and have it fixed. You'll be good to go for a long time.

Jim

corvetteed

i used Stop Leak or Bars Leak in a couple of old cars and both fixes lasted for years and years. No worries.