Just a couple of questions as I am trying to remove some stubborn air pockets from the heater core.

I assume reverse the lines when the engine is cold and then run the car with the heat on for about 10 minutes at idle with both the reservoir and bleed caps on and secure?

Then let cool and put the lines back on properly.

What else am I missing?

Thank you for the help.

 

Normally all you need to do is park it uphill with the passenger side being the highest point and leave the radiator bung out while running it. Any air trapped will go to the highest spot. I've never had to do any voodoo other than that. You might have sediment or blockage in one side of the heater core. Did you flush/reverse flush the system? Wet carpet under the core?

 

Hi,
No wet carpet. The coolant was exchanged recently, along with a good amount of work to the motor. I have not reverse flushed the system yet.

 

Good! I snagged a pump many years back to descale radiators and heater cores with and it does the job big time. Some Jeeps (Liberty) are notorious for heater core sludge. It's very similar to this; http://www.supply.com/liberty-pumps-...mp-260/p638218

Just set submersible in a 5 gallon bucket, attach one hose from pump to the heater core line in either direction and make an extension for the other core hose and drop it back in the bucket - full loop affair. You can do the radiator/block or just the heater core. CLR, Limeaway, and let run for as long as you need. Run it till it turns brown, polishes everything.

 

Great idea ihscouts! Thanks for the info! Cheers!

 

Your welcome. If you can find a decent 1/6 hp pump for cheap it's a great item to keep in the tool kit for many things around the house. If you can score one with a separate inlet/outlet for less than $100 it's a great deal. You don't want the type you can run off a drill cuz they last about 50 hours max. You don't want a 1/2 hp cuz the outlet pressure is 50 psi and it might blow hoses off and cores exploding. Our cooling systems are rated at 15 psi before the cap lets go. Most are fairly low double digit.

 

Great info, thank you.