Finally did it but it seems to have made it worse. The question I have is about the procedure. On the forum here it is suggested to remove the thermostat to do the flush. I did that and drove for more than a hour and a half with the outside temp. at 90 degrees and could only get the coolant temp up to 160 degrees. The directions on the Restore bottle says I need to get the temp. to 185 degrees. Is this chemical temp. activated? Is that why it didn`t work?
why would you pull the t stat?
Any coolant flush on a 6.0 6.4 or 6.7 goes like this...
Step 1. Drive til hot bring into the shop shut down remove degas bottle cap
Step 2. Open pet****
Step 3. Allow coolant to come flowing out.
Step 4. Enjoy a cold one or a smoke and let coolant drain.
Step 5. Come back with your snapon radkit
Step 6. Tighten pet ****.
Step 7. Put vacuum on coolant system.
Step 8. get a 5 gal bucket and fill with water or flush with water whatever makes you happy.
Step 9. Check gauge to see if it holds vacuum.
Step 10. Put fill hose in bucket after you placed bucket on battery.
Step 11. Open pet**** on snap on radkit let the air get in then close it when coolant/water/flush gets to radkit.
Step 12. place vacuum on system again for a couple seconds.
Step 13. Open pet**** on radkit and let fill
Step 14. Once done, pull radkit off bottle, place cap on bottle.
Step 15. Place your radkit back in your box close hood and road test.
Step 16. Inspect coolant level. Add if need.
Step 17. repeat if flushing or your done.