Need help/opinions on coolant flush

[cahalterman]

So, I did some research on a coolant flush and decided to do one on my car yesterday. I'm in the process of doing a 60,000 mile maintenance.

I have a '03 Cavalier LS Sport with an Ecotec motor.

Here is what I did in order. What I need to know is if I did it properly and if I did something wrong should I redo it.

1. First I made sure car was cooled down and unplugged the hoses, inspected them for cracks and leaks which I found none and then took out the reservoir overflow and cleaned it out real good with simple green. Replaced it, and hooked back up the hoses.

2. Removed pressurized reservoir cap.

3. unplugged drain plug on bottom right side of radiator (standing infront of car)

4. Let old coolant drain into catch pan.

5. Put drain plug back in, then filled reservoir container with distilled water (since I didn't see where there was a cap for the radiator like on most vehicles), replaced cap. Ran car for 10 mins to circulate water through engine and dilute coolant in block.

6. Let car cool, pulled plug and drained water out.

7. Replace plug, pour in Zerex Super Flush 32oz and top off with distilled water. Then took car out for a drive of a few miles and came back to flush Zerex.

8. After flushing the Zerex Super Flush I then filled the car up again with distilled water and ran for 10mins to dilute excess flush that still lingered in engine and flushed it.

9. Replace plug and filled radiator back up with 50/50 Dex-cool, went back out drove a couple miles and came back to make sure coolant levels we're where they should be and everything was alright.

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I noticed in my haynes manual it said to drain the block by pulling out a plug underneath in the block which I believe is some sort of freeze plug from what I"ve been reading on other vehicles though I was unable to find it on the my Cavalier.

Is this ABSOLUTELY necessary? I also watched a bunch of Youtube videos of coolant flushes and didn't see any of them mention draining of the block.

Let me know what you think and what you would've done differently. I might've left out a couple things.

Thanks guys!

Chad

[muff34]

sounds like you did a pretty good job to me. Could you come and do a couple of my vehicles please and Thank You! All I ever did was the drain and re-fill as you did minus the coolant super flush and I`ve never had any problems.

[Classicrocjunkie]

You did it the way I have done them on my cars in the past. There is no need to drain the block completely.