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Rust Scale In Radiator.

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Old Dec 24, 2018 | 10:26 PM
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Rust Scale In Radiator.

Rust Scale In Radiator. Engine totally rebuilt several years ago. Radiator cleaned. Always anti freeze/coolant percentage maintained. But. Sat more than driven. Been running hot. Drained coolant to install fan shroud. Lots of rust scale in tubes visible. Obviously from engine. WHY? Correct way would be for radiator shop to pull top and rod out. Any tips on how to prevent problem from happening again. Thank. woodsmoke.
 
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Old Dec 24, 2018 | 10:57 PM
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Many people laugh at it and call it foolish and unnecessary.
I have coolant filters on all my equipment. I change every two years or when the bottom of the filter gets cool. These engines aren't Glyptol sealed so casting media is always liberating from the coolant passages (casting media is the #1 cause of coolant pump seal failures), and the passages being bare cast iron are susceptible to oxidizing corrosion and galvanic action. The Ph value of your coolant should be checked.

My coolant filter.
 
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Old Dec 25, 2018 | 12:24 PM
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One thing many are unaware of is galvanic corrosion. A quick Google brought this up, there may be better information with better searching but it's enough to get you started. http://www.ve-labs.net/electrolysis-101
 
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Old Dec 25, 2018 | 06:21 PM
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Are you sure it's rust, and not mud?
If it's rust, it would surely help to convert to a closed system by adding a coolant overflow reservoir and the correct kind of cap for it. Stick with a 4 psi radiator cap, tho.
 
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Old Dec 25, 2018 | 06:33 PM
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Originally Posted by woodsmoke
Rust Scale In Radiator. Engine totally rebuilt several years ago. Radiator cleaned. Always anti freeze/coolant percentage maintained. But. Sat more than driven. Been running hot. Drained coolant to install fan shroud. Lots of rust scale in tubes visible. Obviously from engine. WHY? Correct way would be for radiator shop to pull top and rod out. Any tips on how to prevent problem from happening again. Thank. woodsmoke.
I strongly suggest looking carefully at what coolant you use. Many conventional coolants on the market contain no corrosion inhibitors. Stay away from a 50/50 mix. You will notice a 60/40 has a higher boiling point and lower freeze protection. Always pull the MSDS and verify it first off is Ethylene based and not a DHA dexcool. I also agree with the above, coolant filters on everything I own. Use the Ford VC9 and do a flush before refilling. Don't bother with parts store flushes.
 
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Old Dec 27, 2018 | 09:05 PM
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I had radiator rodded out today. Have not reinstalled it. Radiator shop guy recommended putting a piece of screen wire in upper radiator hose and drive and check to see how much rust scale is caught. I ran flush before I took radiator off. Attempting to fix over heating problem. That could have broke more rust scale lose from engine. And hopefully less rust in engine. Coincidentally less rust in radiator. After rod out. OK. I admit it is a redneck, hillbilly way to do it. Compared to the scientific, technological advanced advice offered here. One step to the next. But. I will try any thing. Trying to keep all original. Thanks. woodsmoke.
 
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