Had my heater core replaced 2 yrs ago in my little S10 Chevy Blazer along with a new readiator, fan belt, all new coolant hoses and new u-joints in the rear drive shaft. Cost me $2000.00. Well this summer I flushed out the cooling system since it had turned the coolant rusty. Well we took it on a long trip one day and the pump developed a leak and the engine ran hotter than normal. Anyway we made it home but the overheating caused a lot of rust to break loose and of course it clogged up the heater core. I decided to soak the core with some Coke A Cola. It sure broke it loose. I also took the heater hoses off and beat them on the concrete floor. A lot of rust was stuck to the walls of the hoses like cholesterol. I've ordered a strainer to put inline of the supply hose to the heater core to prevent this from happening again.
- Thread starter John B.
- Start date
MarkB_MI
Well-known Member
- Location
- Motown USA
How about "back-flushing" the heater core?
I agree with David, there is no reason you should have rust in your cooling system if you're using the right antifreeze and changing it regularly.
I agree with David, there is no reason you should have rust in your cooling system if you're using the right antifreeze and changing it regularly.
J.Wondergem
Well-known Member
- Location
- Rockford, Mi.
Sounds like well water coming from somewhere. Is it premixed?
Tom-NoCenTX
Member
Please tell us what brand of anti-freeze you used??
Also, did you use 50% distilled water with it??
Sounds like to me that you had a shop do it 2 years ago. They probably used cheapest off-brand coolant they could find and mixed it with plain ole tap water. This is receipt for disaster.
Tom
Also, did you use 50% distilled water with it??
Sounds like to me that you had a shop do it 2 years ago. They probably used cheapest off-brand coolant they could find and mixed it with plain ole tap water. This is receipt for disaster.
Tom
notjustair
Well-known Member
My grain truck is a 1958. It doesn't have rust in the coolant. Only vehicle or engine of any kind with rust I have seen was my brothers 1979 camero burlinetta. Someone had run straight tap water in it for quite some time. Never did get it completely clean. The car was only 4-5 years old at the time.
You need to figure out where that rust is coming from. You will only wear out water pump impellers without really getting to the bottom of it. You need to forcefully back wash that block or something.
You need to figure out where that rust is coming from. You will only wear out water pump impellers without really getting to the bottom of it. You need to forcefully back wash that block or something.
Steve@Advance
Well-known Member
Seen this happen before, used to be common in the 70's, 80's. Not sure what caused it, other than not keeping the antifreeze changed, seen it caused from not having any antifreeze in warmer climates...
What happens is sediment builds up in the bottom of the water jacket in the block. Once it's in there nearly impossible to get it out. It forms something like a brown, acidic paste, it's terrible for freeze plugs. Pull out a leaking one and see a corroded line across the inside of the plug where the sediment was in contact with the plug. When the engine overheated, the boiling turned some of it loose.
I haven't heard of a strainer for heater core protection, be sure it can handle the heat!
What happens is sediment builds up in the bottom of the water jacket in the block. Once it's in there nearly impossible to get it out. It forms something like a brown, acidic paste, it's terrible for freeze plugs. Pull out a leaking one and see a corroded line across the inside of the plug where the sediment was in contact with the plug. When the engine overheated, the boiling turned some of it loose.
I haven't heard of a strainer for heater core protection, be sure it can handle the heat!
Aaron Ford
Well-known Member
I had an 85 Cavalier that had coolant issues. I changed the coolant several times but couldn't get it to clean up. I finally gave up and put a hose in it and let the upper rad hose blow. It took several attempts but i finally got it to blow clear. It was 4 years old when i bought it and after getting it clean, I kept it 6 more years with no problems. Not sure how the problem got started but it was the devil to get rid of.
Aaron
Aaron
pat sublett
Well-known Member
Until last generation anti-freeze, it was necessary to change coolant annually. Coolant had rust inhibiter in it to protect cheap radiators. Old brass radiators were not a problem. Name brand antifreeze made in the last 5 years are support to have rust inhibiter in it that last 5 years. I had some antifreeze that I bought back in early 2000, I called Prestone and they said it only had a 2 year shelf life. Obviously if it had a 2 year shelf life, 2 years would be max in a vehicle.
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