Heater Core Flush: Using CLR
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Date: 2021-03-31
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Comments and reviews: 8
Pat
You are going to fry the red circulator pump bearings. The pump MUST have the motor shaft horizontal. The motor bearings are lubricated with the liquid you are circulating (no grease. When you have the motor end up, air sits in there and you have no lube. It only takes a few minutes to fry a bearing. Yes, they are cheap, but do you have a spare to finish the job? The bearings will also get the grit from the heater core in them and fry eventually, but that is long term. How do I know? 35 years doing boiler repairs.
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You are going to fry the red circulator pump bearings. The pump MUST have the motor shaft horizontal. The motor bearings are lubricated with the liquid you are circulating (no grease. When you have the motor end up, air sits in there and you have no lube. It only takes a few minutes to fry a bearing. Yes, they are cheap, but do you have a spare to finish the job? The bearings will also get the grit from the heater core in them and fry eventually, but that is long term. How do I know? 35 years doing boiler repairs.
reply
David
Wouldn't heater core and radiator blockage be a sign that they didn't use distilled water or that the anitfreeze had non-distilled water in it from the factory? I suppose the hoses could introduce some blockage if they are old enough and shedding from the inside but doubt it or perhaps the engine is shedding iron or aluminum particles. Regular changes of antifreeze should prevent this. Don't wait till your antifreeze looks like mud and ALWAYS use the correct type, not the cheapest.
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Wouldn't heater core and radiator blockage be a sign that they didn't use distilled water or that the anitfreeze had non-distilled water in it from the factory? I suppose the hoses could introduce some blockage if they are old enough and shedding from the inside but doubt it or perhaps the engine is shedding iron or aluminum particles. Regular changes of antifreeze should prevent this. Don't wait till your antifreeze looks like mud and ALWAYS use the correct type, not the cheapest.
reply
Michael
I have used CLR more recentlyand have notice that if left to set, non circulation. That the CLR has a chance to work on the problem at hand. Were I live the water is very hard. The cats water dish starts to get crusty scale after 2wks. I put just a splash in fill with water half way up. Let set an hour. Wipes clean with little or no effort. But yes rinse well and wash with dish soap. Just putting it ina few mintes works but you work harder too. Hope this helps.
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I have used CLR more recentlyand have notice that if left to set, non circulation. That the CLR has a chance to work on the problem at hand. Were I live the water is very hard. The cats water dish starts to get crusty scale after 2wks. I put just a splash in fill with water half way up. Let set an hour. Wipes clean with little or no effort. But yes rinse well and wash with dish soap. Just putting it ina few mintes works but you work harder too. Hope this helps.
reply
Stephen
In Ukraine they use radiators for home heating. If you use anything other than distilled water and the proper fluid to fill and pressurize the system, corrosion and blockage follows. I guess the water here contains minerals that react with the metals in system. I guess that s why Mercedes has been using the hoat coolant for years. On this dodge, where did the minerals come from to corrode system? The faucet in a home or garage.
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In Ukraine they use radiators for home heating. If you use anything other than distilled water and the proper fluid to fill and pressurize the system, corrosion and blockage follows. I guess the water here contains minerals that react with the metals in system. I guess that s why Mercedes has been using the hoat coolant for years. On this dodge, where did the minerals come from to corrode system? The faucet in a home or garage.
reply
Glenn
About 6 years ago I asked my mechanic to flush the radiator in my 1998 Jeep Grand Cherokee and he said it was clogged. I took it to a coolant specialist in my area and they managed to flush the system. A day later my Jeep started to overheat while driving. It seems the radiator was now leaking. It cost me a grand to have it replaced. They may have used your method but over-pressured the system while flushing it.
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About 6 years ago I asked my mechanic to flush the radiator in my 1998 Jeep Grand Cherokee and he said it was clogged. I took it to a coolant specialist in my area and they managed to flush the system. A day later my Jeep started to overheat while driving. It seems the radiator was now leaking. It cost me a grand to have it replaced. They may have used your method but over-pressured the system while flushing it.
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Jim
We have saved many cars as you have with heater core flush s instead of probably a real pricey job having a customer sell off an old car that got a few more years out of it. When they get older heater cores or evap cores an50/50 job as in customers get rid of cara or fix and this type of repair keeps them going. I have never seen CLR attack anything myself
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We have saved many cars as you have with heater core flush s instead of probably a real pricey job having a customer sell off an old car that got a few more years out of it. When they get older heater cores or evap cores an50/50 job as in customers get rid of cara or fix and this type of repair keeps them going. I have never seen CLR attack anything myself
reply
Tim
I've used liquid and cascade dish washer soap for cooling systems with some success. and a industrial rust stain remover. (I can't remember the name) it was for cleaning rust marks off RVs. one of the parts guys I dealt with was also a rv parts dealer. back in the day when good parts came from guys named honest jack. not research branded big box zones.
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I've used liquid and cascade dish washer soap for cooling systems with some success. and a industrial rust stain remover. (I can't remember the name) it was for cleaning rust marks off RVs. one of the parts guys I dealt with was also a rv parts dealer. back in the day when good parts came from guys named honest jack. not research branded big box zones.
reply
Alan
That is an awesome little trick with the CLR, I am going to remember that I have used a mild degreaser in the past like Dawn dish soap (which worked okish) but the problem came back so it didn't get everything now maybe I didn't do it long enough or maybe didn't have enough soap I don't know. but CLR seems like a way better solution.
reply
That is an awesome little trick with the CLR, I am going to remember that I have used a mild degreaser in the past like Dawn dish soap (which worked okish) but the problem came back so it didn't get everything now maybe I didn't do it long enough or maybe didn't have enough soap I don't know. but CLR seems like a way better solution.
reply
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