Coolant Flush, Rust or Stop leak?

[05P0werStroke]

Ok well, i started flushing my system with distilled water and have a few questions.

First, after flushing 4 times with 4 gallons each time, there are still rust particles in the bottom of the bucket after draining the radiator. Is this normal(grains of rust)? I removed the top radiator hose and the inside was coated with red/brown rust on the inside so I bought some VC-9 and have drove/idle 1.5 hrs so far. Also put in some simple green and going to let it sit overnight.

Second, after flushing the 4th time i went ahead and installed my coolant filter.

Last, Now if I keep flushing will all the rust come out or will it never come off the inside? I can't figure out how the block rusted since there was antifreeze in there and the glycol shouldnt let it rust. thanks

[smokersteve]

the vc-9 will really clean that system out. That is probably why you keep getting junk flushing out. It would be better to connect the coolant filter after you finish flushing the truck so that you do not waist the coolant filter. flush the junk out then put it on.

Is it still sitting with vc-9?

did you drive with simple grean? if you have not, do that so it mixes, then let it sit.

[smokersteve]

If you remove the thermostat and run the truck with the chemicals in there, it will do a better job at picking up the solids.

[05P0werStroke]

well the thermostat is stuck open right now and I've already bought a new one which I'll be installing. I flushed the vc9 out this morning and it was black, which tells me it worked. Also there was less particles in this flush so hopefully the filter is helping. Have any of you ran into the rust problem. I removed the uper hose after draining the vc9 and the rust was starting loosen up. Thanks