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Kingtal0n · 09-07-2020, 03:14 PM

1. remove thermostat so rust chunks dont get stuck
2. with engine running, unplug the upper rad hose so the water can drain out, then use a hose and flush with tap water until the water looks normal and rust is gone. Flush for at least 30 minutes. Rev the engine a bit sometimes to help push the water.

3. put the hose back on and drive the car a little to free up more rust

4. Repeat (2. and 3.) until all rust is gone

5. Now if there is still questionable rust chunks leave the thermostat out for the next part. Otherwise reinstall thermostat.

6. Fill radiator with 100% distilled water, flush the rad and engine until it only has 100% distilled water. From this point onwards, NEVER put tap water inside the engine again. ONLY distilled.

7. Use some kinds of radiator cleaning agent. This step might take 1-3 weeks because sometimes you can drive with the rad-flush juice for many days at a time.
Use any Radiator flush from auto part stores. Try different versions over time if you like, first week this one. Next week a new one. Next week a different one again, etc... Flush again and again with distilled water and keep using radiator flush from the auto-store and distilled water until the water you drain looks normal. The rad flush stuff will help clear the last remaining bit of junk from the system and the distilled water is necessary to maximize the effects of rad flush juice that you buy from the store.

8. After removing all 'radiator flush juice' by flushing again with 100% distilled water, You can put on all new parts you can access that were rusty (radiator, thermostat, hoses, metal outlets, metal tubes, anything you can comfortably change that had rust in it or is rusty) now that the water looks normal.

9. At this point you should have 100% distilled water and all new radiator and parts in the engine and good looking water. Now, to keep it that way, add anti-freeze as required by location, i.e. In Florida I use 10% anti freeze (because it never freezes here) but up north you will need more anti-freeze. Use the least amount of anti-freeze possible. Water is better at cooling, but some anti-freeze is necessary to prevent the distilled water from eating the metal parts over time.

09-07-2020, 03:14 PM	#16
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 41 Posts: 4,828 Trader Rating: (17)	1. remove thermostat so rust chunks dont get stuck 2. with engine running, unplug the upper rad hose so the water can drain out, then use a hose and flush with tap water until the water looks normal and rust is gone. Flush for at least 30 minutes. Rev the engine a bit sometimes to help push the water. 3. put the hose back on and drive the car a little to free up more rust 4. Repeat (2. and 3.) until all rust is gone 5. Now if there is still questionable rust chunks leave the thermostat out for the next part. Otherwise reinstall thermostat. 6. Fill radiator with 100% distilled water, flush the rad and engine until it only has 100% distilled water. From this point onwards, NEVER put tap water inside the engine again. ONLY distilled. 7. Use some kinds of radiator cleaning agent. This step might take 1-3 weeks because sometimes you can drive with the rad-flush juice for many days at a time. Use any Radiator flush from auto part stores. Try different versions over time if you like, first week this one. Next week a new one. Next week a different one again, etc... Flush again and again with distilled water and keep using radiator flush from the auto-store and distilled water until the water you drain looks normal. The rad flush stuff will help clear the last remaining bit of junk from the system and the distilled water is necessary to maximize the effects of rad flush juice that you buy from the store. 8. After removing all 'radiator flush juice' by flushing again with 100% distilled water, You can put on all new parts you can access that were rusty (radiator, thermostat, hoses, metal outlets, metal tubes, anything you can comfortably change that had rust in it or is rusty) now that the water looks normal. 9. At this point you should have 100% distilled water and all new radiator and parts in the engine and good looking water. Now, to keep it that way, add anti-freeze as required by location, i.e. In Florida I use 10% anti freeze (because it never freezes here) but up north you will need more anti-freeze. Use the least amount of anti-freeze possible. Water is better at cooling, but some anti-freeze is necessary to prevent the distilled water from eating the metal parts over time.