Draining coolant on E99 F350 7.3 - Ford Powerstroke Diesel Forum
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Old 06-30-2011, 09:30 AM
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Draining coolant on E99 F350 7.3

I am adding a coolant filter on my early 99 F350. First I want to drain out all the coolant from the block,heater core and raidator so I can see how much grit comes out after the first coolant filter change.
How do I get the coolant from the heater core and the block.
Thanks in advance
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Old 06-30-2011, 09:54 AM
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There are a pair of plugs in the back of the block...to get the coolant out of the heater core do a back flushing using those stupid NAPA or prestone coolant flush kits...

If you really want to see what comes out of the heater core, then cut or disconnect both of the times and pump water in one hose and watch what comes out the other but really it is more important that you flush it out than see what is in there. Most of your crap is going to be in the lower radiator hose anyways.

Here is more info on coolant than you will ever want....

Coolant changing instructions... - Diesel Forum - TheDieselStop.com
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Old 06-30-2011, 10:30 AM

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I wish I would have done the filter... That's a must in the near future. Hey, if you haven't done it yet, I'd get the thermostat and housing from dieselsite. The 203* thermo. I did this when the water pump was replaced. I also forked out the dough for the CAT EC-1 Coolant. It's been about two plus years, and no issues.

Mobil USA | Heavy-Duty Engine Oils | Mobil Extended Life Coolant Antifreeze
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