How to Flush a Heater Core – Found the Best Way to Clean?These hoses allow water to enter, circulate and clean heater core out of the heater core back into the radiator. They therefore need to be removed so water can flushed through the core. As far as mechanical knowhow is heatre, the only difficulty you might have will clean heater core detaching and attaching the hoses with the clamps. Cracked Head or Block? Have any of these symptoms? K-Seal could save you thousands on a workshop dollywood.
Best cleaner to flush a heater core | Mechanical/Maintenance Forum | Bob Is The Oil Guy
Admin , Global Mod , Mod. Still trying to work out some kinks. I have heat but its nowhere near what it should be. Truck is a 96 GMC Sonoma 4. I am pretty much convinced the heater core is plugged up to some degree. What is the best thing I can use to help clean it out with?
I was under the impression that most heater cores today, always have flow. On older cars, the heat control shut off flow to the heater core and this caused gunk and build up. Are you sure the engine is up to temp, that the coolant is not low, and that the air flow blend door is working? If you've fully established that the heater core is plugged.
CLR would be quite good, a couple vinegar rinses after that would be good. Eric the car guy did a youtube video on that some time ago. He used some cleaner plus compressed air to blow out the crud. I think it's a good video. Watch it if you get a chance.
Feel the heater hoses. If they are hot it's flowing , cool not. I had little heat in my '07 Grand Prix. I flushed the system of dexcool and changed the thermostat. Heater hoses were hot to the touch.
Still had little heat. New coolant was clear of gunk. Starting to think I had a bad core. Read up on how to replace a heater core and thought, there has to be another answer.
Since one heater hose already has the flush "t", I cut the other and put in another t. I hooked up the garden hose to to one heater hose and squeezed the nozzle - out came rusty colored pudding. It ran clear in a few seconds. Then I hooked up the nozzle to the other hose to back flush. Surprisingly, more gunk came out.
Hooked the hoses back to normal, refilled the coolant I lost, bled the system, and you could cook a roast in the car now.
Disconnect the hoses and run some water from a garden hose in. If this does not work, a teaspoon or two max 3 teaspoons or a tablespoon or plain dishwasher detergent. No lemon scent, not orange scent. Not CLR or anything acidic, heater core is very thin aluminum. Rinse out the core, reconnect Previous Topic Index Next Topic. Print Topic Switch to Threaded Mode. You are not logged in. Front end bug protection? Internet speed super slow on Linux laptop Any night owls listen to AM in Toronto?
First time going to Indy Anyone still eat breakfast anymore? Must colleges disclose donations, by law? Alko , Projecto , Kole , toyobaru , vbslam Registered Users. Page 1 of 2. Best cleaner to flush a heater core [ Re: What have you done so far to get more heat? The Tropical Fine City.
This is not so much the case. This heater doesn't have that. If it's partially clogged, some sort of weak acid and lots of water should be used. If that doesn't work it's time for a new one. Deplorable in apple valley, ca. Important to flush core in both directions. And if there's a problem, how hard is it to change on this vehicle? If it's a relatively easy change under 20 minutes on my F, hours upon hours on the old LTD , it isn't even worth playing with if it's clogged or weak.
Garak Originally Posted By: Feeling the heater hoses is a simple test just to give you an idea if the core is plugged or not. Totally plugged or almost they will be cool to warm compared to the engine hoses.
If hot it should be OK but a flush is always the first method to try and clean out and it generally helps unless it's really plugged bad. Even if the hoses are hot it still is good to flush if you feel you are not getting the heat you should. Always the risk of there being a leak afterward though if lots of corrosion going on. Make sure your engine is coming up to proper op temp or the thermostat is suspect. And of course check the operation of the heater doors or a flow valve if it has one.
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