Chemical To Clean Out Heater Core

You may want to run a chemical flush in the system first to loosen the gunk up and then use hose pressure to flush out the radiator engine and heater core thoroughly. Cant get heat so was i was going to do a direct heater core backflush but cant get to the heater hoses to get them off and they make these clamps so hard to figure out sometimes so you cant do your own work. Is your heat not working or is your heater not hot.

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Add hot water into the same temporary hose to completely fill the heater core.

Chemical to clean out heater core.

Pull them back a few inches so that we can remove the hoses. Be sure the hose is positioned so anything that comes out of it will pour into the container. Besides if you follow the directions the chemical flush should be safe for the whole cooling system. If the core was clogged expect the rest of the system to have plenty of buildup and it can simply re deposit in the core if it all wasn t cleaned out.

Remove heater core outlet hose. If the heater core is small or the core is. Slowly twist the hose back and forth while pulling to slide it off the outlet. Between each i covered my engine bay with plastic popped the radiator cap and pulled the hoses off my heater core up by the firewall.

Take care not to damage. Use pliers and pull the metal hose clamps back. Install temporary hoses onto the heater core nipples. Allow to sit for 1 hour.

Part 2 of 3. Pour r106 cooling system flush into the heater core using one of the temporary hoses. Learn how to flush your heate. My point was that there could be blockage in another part of the cooling system other than the heater core that is causing your problem.

In order to clean the blockage out of the heater core you will need to force either air or water through the system. Unless you are 100 sure the blockage is in the heater core you might be barking up the wrong tree. I blasted air through each hose with the air compressor shooting it out of the top of the radiator filled with water and blasted it again over and over until it came out clear. If i do a radiator flush as you suggested will that clean my heater core at all and how well in comparison to a direct back flush.

As you do so the coolant water and grime within the system will be expelled through the inlet hose. You may have a clogged heater core so do a heater core flush and unclog it.