Radiator Sealant
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Senior User
Joined: Sep 2004
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From: Columbia MO
Radiator Sealant
I purchased an Expedition the summer before last. well everything went fine up til a few weeks ago when the radiator stopped flowing. I changed out the radiator and flushed the block out with water. Pulled the coolant tank out and had to use gasoline to clean out three types of radiator block. washed it out with soap and water put everything back together took it out for a good test drive and it passed with flying colors.
Now the problem the next day I took it to the store and the new thermostat was stuck closed! it did free it self up when the temp skyrockted and I shut it down for a few minutes. What kind of flush is out there to get rid of the leftover sealant that seems to still be in the engine block?
Now the problem the next day I took it to the store and the new thermostat was stuck closed! it did free it self up when the temp skyrockted and I shut it down for a few minutes. What kind of flush is out there to get rid of the leftover sealant that seems to still be in the engine block?
Senior User
Joined: Nov 2007
Posts: 320
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From: Roanoke, VA
Nothing will remove it all and if it did you would find out why it was placed there. You may have to run without a thermostat until enough sealant leaches out and you can flush again and reinstall new thermostat. Heater core is probably not putting out much heat anyway for MO. Watch intake manifold for leaks.
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Senior User
Joined: Sep 2004
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From: Columbia MO
The radiator is brand new along with the thermostat I cleaned out the coolant tank with gasoline since it was out. the engine block seems to be the problem all the left over radiator block sitting in the cavities. I'm not about to use gas in the engine block to get the rest out so for now I'm still scratching my head as to what to use. I'm going to take out the thermostat and put some small dents where it seats to prevent the radiator block from sealing it shut and put it back in until I figure out how to get the garbage out of the system. So I am still open to ideas to get this stuff out.
Laughing Gas
Joined: Oct 2007
Posts: 967
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I have heard , never used , vinegar and distilled water is good for cleaning .
Honestly , I have had very good results using commercially available radiator flush.
In your case , I would remove the radiator and thermostat, make a loop to connect the radiator hoses , and run it up to temperature and drain.
The key is to reverse flush .
Also make a loop to delete the heater core as well to prevent clogging that.
You will need to do this cycle several times .
Honestly , I have had very good results using commercially available radiator flush.
In your case , I would remove the radiator and thermostat, make a loop to connect the radiator hoses , and run it up to temperature and drain.
The key is to reverse flush .
Also make a loop to delete the heater core as well to prevent clogging that.
You will need to do this cycle several times .
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From: Southern California
The radiator is brand new along with the thermostat I cleaned out the coolant tank with gasoline since it was out. the engine block seems to be the problem all the left over radiator block sitting in the cavities. I'm not about to use gas in the engine block to get the rest out so for now I'm still scratching my head as to what to use. I'm going to take out the thermostat and put some small dents where it seats to prevent the radiator block from sealing it shut and put it back in until I figure out how to get the garbage out of the system. So I am still open to ideas to get this stuff out.
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