coolant flush troubles please help! - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 04-24-2012, 01:42 PM Thread Starter
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coolant flush troubles please help!

Ok guys I finally got around to doing my coolant flush,drained coolant, removed thermostat, flushed it till clear(3 hrs), drained block too, replaced themostat, filled 3.5 gallons of elc, rest di water. Now here's my problem, it takes forever to heat up now. I'd say atleast 15 miles. Does this sound like a themostat that is stuck open? Also noticed the lower rad hose isn't as warm as the top one. I dnt have gauges yet, I just wanna find out why it takes sooo long to get to operating temp? I checked to see if the water pump is flowing by taking the hose from the intake to the degas tank and its flowing. Any ideas?

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post #2 of 7 Old 04-24-2012, 01:58 PM
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Originally Posted by 6ohslow View Post
Ok guys I finally got around to doing my coolant flush,drained coolant, removed thermostat, flushed it till clear(3 hrs), drained block too, replaced themostat, filled 3.5 gallons of elc, rest di water. Now here's my problem, it takes forever to heat up now. I'd say atleast 15 miles. Does this sound like a themostat that is stuck open? Also noticed the lower rad hose isn't as warm as the top one. I dnt have gauges yet, I just wanna find out why it takes sooo long to get to operating temp? I checked to see if the water pump is flowing by taking the hose from the intake to the degas tank and its flowing. Any ideas?
not trying to sound like a smart *** but are you sure the thermostat is back in?

2003 F-250 6.0 ECLB- [B]
-EGR Delete-Oil cooler-6.4 Banjo Bolts-WW2-turbo feed and drain lines

Previous trucks: 1997 F-350 CCLB, 2000 F-350 CCLB, 2008 F-250 CCLB
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post #3 of 7 Old 04-24-2012, 02:19 PM
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not trying to sound like a smart *** but are you sure the thermostat is back in?
a new one?
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post #4 of 7 Old 04-24-2012, 02:44 PM Thread Starter
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Yeah I put the old one back in (I remember cutting my fingers getting it back in), its only a year old so I didn't think I needed to replace it, I had it replaced when I did my studs, gaskets, oil cooler, egr delete ect...I wanted to flush the coolant to get the green coolant out and elc in. Thanks guys.

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post #5 of 7 Old 04-24-2012, 04:14 PM
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Sounds like a stuck thermostat. Probably need to pull it and check to make sure it isn't bound up.
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post #6 of 7 Old 04-25-2012, 04:47 AM Thread Starter
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Going to replace the thermostat today, how many gallons of coolant should I drain so the top hose is empty? Thanks!

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post #7 of 7 Old 04-25-2012, 10:54 AM
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If I were to do it, I would just pull the bottom hose and let it drain into a bucket. Change thermostat and pour the coolant back in. I don't know how much this is, but that would be my strategy.
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