Clr To Clean Out Heater Core

Remove heater core inlet hose.

Clr to clean out heater core.

Radiator flush which is an acid much like clr but which has been tested fairly well in cooling systems. And let it sit for a few hours. Same as the outlet hose gently twist and pull the hose off. It is the factory aluminum heater core and it appears to have zero issues no leak stains no bulging no corrosion evident of any kind.

Have the other end in the bucket to collect the coolant and sediment that comes out of the heater core. Recently i heard about the idea about using clr to clean out a radiator so i purchased several bottles of clr and i disconnected the radiator hoses and drained the radiator. The heater core is similar to a radiator and is a part of the vehicle s coolant system. Remove calcium lime deposits with old trick itm4x4 is a humble independent mechanical shop.

Hot coolant that has passed through other parts of the engine is run through the heater core as air is forced past it and into the cabin of the vehicle to heat it. I am wondering if i can use some clr cleaner to help flush out any residue stuck in the heater core. I attached the end of the garden hose back to the inlet side and i let the clr do its thing for about 30 mins. Be prepared for some more coolant coming out.

I pulled the heater core and found it to look very good. Flushing the heater core can remove these clogs but if it fails to work you may need to have your heater core replaced. You should know however that if you have a heater core that is plugged it may also be. How to s on repair restoration detail and customization of jd.

Attach the longer section of tubing to heater core inlet.