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Old 02-20-2011, 06:43 AM
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Coolant ?

I know that there is a complete write up on the procedure to flush the coolant but I can't find it. Can someone please direct me to it. Thanks guys.
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Old 02-20-2011, 07:00 AM
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Drain coolant by removing lower radiator hose. Drain block from plug on drivers side of the block. Remove the thermostat. Replace plug in block and put lower hose back on. Put thermostat housing back on without thermostat. Fill with tap water. run for 5 minutes then drain as above. Put 2 qts of VC-9 and fill with tap water. Drive it for about 60-90 minutes. Drain and flush after. Put in 1 gallon of Restore an top with tap water. Drive it for an 60-90 minutes then drain. Flush 2 times with tap water or whatever it takes to come clear. Flush 3 more times with distilled water. Replace thermostat or put in a new one. Put hose back, make sure block plug is tight. Add 3.5 gallons of ELC concentrate and top off with distilled water. Make sure to run engine for 5 minutes between flushes to circulate the water good. Have heater on set to hi while doing this to flush the heater core too
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Old 02-20-2011, 07:13 AM
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sounds like alot of fun !!!
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Old 02-23-2011, 06:30 AM
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Thanks. I thought I read that there is some drain plugs on the block to remove. Is this correct?
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Old 02-23-2011, 06:42 AM
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This is from PGreenSVT

Re: Question for the All Knowing Coolant GURU!

--------------------------------------------------------------------------------

Quote:
Originally Posted by tonyf250
What do I need for the coolant flush? I found Restore how much do I need and do I still need VC-9? How much coolant should I buy? I found the Rotella Red 50/50.

Get a gallon each of Restore and Restore Plus (same as VC-9 but cheaper). Get 4 gals of ELC concentrate not 50/50 and 20-24 gals of distilled water. I recommend a new thermostat as well.



Flushing and cleaning the 6.0

Restore is for cleaning out any silicate goo. VC-9 is for cleaning out iron and scale. Restore Plus is the same as VC-9 and cheaper.

To flush drain the coolant by removing the lower radiator hose from the radiator, and removing the drain plug from the driver side of the block. There is a drain plug on the passenger side also but you have to remove the starter to get to it. I don't bother with that one. You can skip the block drains if you want except for the final drain before adding fresh coolant. You will just have to flush a few more times to get the block clear.

I also highly recommend you pull the thermostat out on your first drain and put the housing back without the thermostat. It only takes about 10 minutes and will save you 2.5 hrs or so in doing this whole procedure.

Ok now put the lower hose back on and the drain plug back in the block if you removed it. This is the procedure you will use each time to drain the system, except you will not touch the thermostat again until you're finished the whole procedure. Make sure that you set your heater to high while doing this to flush out the heater core as well.

Fill the cooling system with tap water, start the truck and let the water circulate for 5 minutes. (if you did not remove the thermostat you must run the truck until the thermostat opens + 5 minutes to circulate. This takes 15 to 20 minutes each cycle and is why you should just remove the thermostat) Stop the engine. Drain the system and repeat the flush.

Now add at least 1/2 gallon of Restore and fill with water. Drive truck or run on high idle for 60-90 minutes. Drain and flush 3 or 4 times.

Add 2qts VC-9 or 1/2gal of Restore Plus, top with water, and drive the truck or run on high idle for 60-90 minutes. Now drain and flush until flush water comes out clear and clean. When you get clean flush water, flush 3 more times using distilled water if you are draining the block or 5 times if not. This is to replace any tap water in the cooling system with distilled water and very important.

After your final distilled water drain it is time to put the thermostat back in. I recommend you install a new thermostat at this point. They are only $20 or so and it is good maintenance procedure to do so. Fill with 3.5 or 4 gals of ELC concentrated coolant and top off with distilled water. Drive the truck or let run for a while topping off with distilled water. Check the truck over the next few days and top up as required while any air left in the system works its way out.

Keep some 50/50 ELC on hand to use to top off the cooling system from here out and you are good to go.

Hope this helps.

Mitch
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Old 02-23-2011, 09:16 AM
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What do you do with the old coolant? I'm sure that you collect and dispose of the coolant the first time that you drain the system but what about all of the flushes including the ones with the restore and restore plus? Thanks.
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