Flushing heater core

[Monk]

Has anyone ever did this?

My front cores about 4-5 years old and just for next year I was planning to flush her out.

I'm assuming behind the water valve I can do it , backward first then other way to mix her up??

Then refilled with antifreeze and wait till winter

Just more so maintaining type thing

[Monk]

From what I can tell you flush from the top hose first for a little

[Boeing Jet]

Hey Monk
 
I did mine a few weeks ago and did it both ways.

[Roy]

You do not have to empty system.
Just put a bypass at the heater core hoses.
The inner heater has not normally given any grief that I know .
Now flush the core out both ways till it flowes evenly each way, as well as fast.
I normally use both air and water.
Re connect the hoses and top up coolant as it runs.

[Monk]

Now, with spring weather , its gonna be getting warmer I think I'll giver her a try sometime , lol and prep for winter again


But still , so me help me gawd, if I flush it and find my front core blast to the ground from water pressure , I won't be impressed, heehhe

[Roy]

No worries, keep them in stock