If the leak is in the copper fins/heat exchanger : replace the exchanger, gaskets etc Not a job for someone who is not familiar with pool heater construction and service. If the leak is at the inlet or outlet you may have to remove those fittings and replace woth new ones.
you can try radiator leak stopper, but i would just replace heater core .,eally cannot be repaired.
It is inside the heating A/C housing. The dash has to come out to get to it. A very involved repair. Even the most experienced master mechanics cringe at having to do a heater core repair. I would suggest putting some aluminum stop leak in the radiator. It will stop the leak in the heater core and will save you the grief of pulling the dash out.
You can try Stop Leak, in an emergency. The only real repair is replacement.
You have a leak. You need to find and repair the leak.You have a leak. You need to find and repair the leak.
If it is leaking under the truck it is not the heater core that is leaking. It would leak inside the vehicle on the passenger side. There is a drain tube for the A/C that is under the vehicle on the passenger side, and water from that with the A/C on is normal. If it is coolant, check the heater hose connections at the firewall. If you find that the heater core is actually leaking, replace it. No other repair is permanant.
The core will need to be replaced.Don't waste time trying to repair an old core.
bars leak will plugg up your heater core meny times, good luck!
repair emission leak
Its your heater core ( a little radiator inside the heater ) for now you can purchase a flush kit at the parts store and connect the two heater hoses to it to make a loop until you can replace the core.
No. Once a water heater tank leaks there is no fixing it. Just replacing the water heater. And it should probably done as soon as possible, since the potential for a bigger leak to open is very possible.
If coolant is leaking inside your cabin, you have a leak in the heater core. The only repair is to replace the heater core. Most auto parts stores sell them.
You probably have a leak in your heater core or the hoses going to your heater core. These are located behind your dash assembly. To repair this problem, the ENTIRE dash assembly (dashboard for driver and passenger) must be removed to access the heater core and the A/C evaporator assembly. This is a lengthy procedure taking a good mechanic SIX TO EIGHT HOURS, which means the repair will also be expensive. The cost for the core itself is around $100-200.