It would be best to disconnect the coolant lines and flush the core after the radiator flush. This will clear any sediment from the core.
flush your cooling system, you may have blockage in your radiator not allowing the water too cool, but if the radiator is that plugged up its probably no good. look at the radiator to see if there is any corosion or small leaks in the little fins in the middle, i have had a few that were plugged so bad that when i flushed the radiator it leaked. if that does not work it could be the water pump. ive also had a plugged heater core, and extreme amount of rust, from poor coolant system management, plugging off water ports in the engine and in the head gasket on the engine.
Buy a kit at Wal-Mart or auto parts comes with adaptors, fittings, and instructions
Try taking both heater hoses off and run a garden hose through the core with lots of pressure to be sure its not plugged. If the core is ok the radiator is probably plugged and will have to be boiled out or replaced.
The heater core is usually your last resort. So now start from the end to the beginning, core, thermostat, flush, hose, fluids. Follow the trail and your bound to find your answer.
degradation of the coolant. flush the system and refill it, and all should be well.
I did a manual flush on the heater core with water from a hot water tank. I flushed a ton of crap out but did have to end up replacing the water pump.
The radiator on a 1999 Mercury Cougar is flushed by draining the radiator, filling it with water, and adding a commercially available radiator flush. The engine is allowed to circulate for 10 minutes, drained, flushed with fresh water, and refilled with coolant.
If the rust and metal that builds up in your radiator isn't flushed properly then after time it will clog up your heater core. That's a pretty pricey fix by the way.
If your asking about a heater core for a car. you pretty much have to pull the engine to get at it. as it is part of the system, it should get flushed out when you flush the system.
I wouldn't think you could flush a heater core. you can flush a radiator. Heater core you would have to replace if it is leaking or stopped up
The radiator on a 98 Buick Century is flushed by turning the petcock to drain the coolant. Water is then flushed through the system until all contaminants are removed.
The radiator on a 1995 Saturn is flushed by draining the coolant, refilling the engine with water, and adding a flush. It is allowed to circulate and drain before refilling with coolant.
I changed the termostat but still no heat , also flushed the radiator and heater core could i have air in the coolant system, would it do any good to use a flush kit at the heater core hoses.
I also have a 2000 jeep wrangler. This year has a problem with the heater core plugging up. You can either try to flush it out, or just replace the heater core.
You can flush the block thru the line to the heater core at the firewall. This will flush the heater core also.
The radiator on a 1999 Pontiac Grand Prix is flushed by draining the coolant, filling the system with water, adding a liquid flush to the system, and running it for a few minutes. The system is then drained, flushed with fresh water, and refilled with coolant.
You still need to flush the engine block and heater core.