Leaking freeze plug - Chevy Message Forum (2024)

Hey guys I noticed this freeze plug has a little leak. What do y’all recommend I do with it?
Thanks

Aside from ignoring it, I feel like there's but 2 options; remove and replace, or pour a can of stop leak into the radiator and hope it stops the freeze plug leak.

CHANGE that plug now while you have easy access. If you don't, it will only get worse and cost you more $$$ to remedy later. CHANGE IT!!!

Chuck

Is it 1 5/8”?

Over the years, when I have seen one freeze plug start leaking, the other ones won't be far behind. It's usually the ones that are the most pain in the rear to get access to as well. Not a fun job, good luck.

Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

• 62sedan Said:

Fast forward into the near future:

Your post: 'When the car sits for a while I get the small pool of what smells like coolant under the car near the bell housing. What should I do?'

Back to today: Replace them all while accessible. Unless you wanna pull it apart again.

And, flush and change the coolant while at it.

Pete

Yeah so to remove the plug , just whack it out with a punch and remove with pliers?

I would start by using a commercial cleaner on the block, radiator, and heater core, and make sure that everything is clean. You might as well add hoses to the project also. Find every freeze plug and pull them out. I used a drill and made a hole in them and then put a hooked puller into the hole and yanked them out like I was a dentist. It is a pain to get to all of them, and I don't remember but some cars had a couple at the back of the engine. I never bothered with the brass plugs, because by the next time the steel ones rust out, good chances are that neither of us will be living.

Never argue with an idiot. He'll drag you down to his level, then beat you with experience.

It's a no brainer, Change it. !!!

• Eth727 Said:

You forgot you have to drain the block and add numerous hours of cursing before coming to the conclusion that it would be easier to do it on a lift. There will be all kinds of stuff in your way and installing them can be just a tricky a removing them for the lack of room to swing a hammer.

If you decide to replace only the one leaking, you will be back at it in less than a year. The corrosion is usually caused by improper water/coolant mixture. Your radiator will also suffer as a result.

Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

When you change it out, be sure to replace with a BRASS freeze plug. Any replacement steel freeze plug will corrode a lot quicker.

Chuck

i would replace it with brass and some sealer. if you flush the system it may cause more leaks. run antifreeze.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.