whats a good product to stop a leak in my cooling system on my 1988 chevrolet truck?

Question

I think the leak is at an external tube outside the engine block.

Answer 1

The best thing is to fix it right. I know at the truck plant, when we put in the radiators they throw a circular blob in there, it is about as big as an old silver dollar and about 1/2" thick. That is to just help seal everything up.

It isn't a good idea to throw that stuff in there. It will mess with the heater core, and sometimes the leak can come back. It could also just be the hose that is leaking. Have it looked at first, and then corrected. good luck.

Answer 2

there is none that i am aware of, any product I have used or seen used causes other damage, usually to the heater core.
The best thing by far is to find the leak and repair or replace it.
The stop leak type products are bandages only and should be avoided. If you're broke down in the desert and have no options then they are worth a try but take it from one who has been there done that, get it fixed right, cooling system repairs are usually pretty basic and not horribly expensive.

Answer 3

take your truck to a mechanic and get this problem fixed properly or risk the chance of loss of the engine due to your cheap attitude of adding ''barr's leak sealant''' --- it is better to spend a few bucks to get a new hose ((leak stop will not seal a broken hose))) than try to replace the motor in yo '88 chevy

Answer 4

I've had success with Bars-Leaks, usually 1/2 bottle will do.

Answer 5

fix the leak properly.. never a good idea to add stopleak