Intermittent coolant leak - Ford Powerstroke Diesel Forum

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post #1 of 18 Old 07-29-2013, 08:15 AM Thread Starter
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Intermittent coolant leak

So I have drip on the groind like every other day. Don't want to do the water pump if you guys think it is something else?
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post #2 of 18 Old 08-08-2013, 06:27 AM Thread Starter
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Ok, the truck has sat since monday. No leaks until this morning. I go out and there are a couple drips on the ground, with a drip hanging off the lower hose. Any ideas?
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post #3 of 18 Old 08-08-2013, 06:48 AM
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i'd replace it, for peace of mind....RockAuto has AIRTEX for 72 buks.

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #4 of 18 Old 08-11-2013, 12:36 AM Thread Starter
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Ok since I drive the truck on thursday through sunday no leak again. Just seems odd to me only leaks when it sits for a couple days and not a big leak at all. So I am going to replace the water pump, all hoses and install a new idler pulley. MAIN QUESTION, where can you get new water pump bolts, don't want the old ones to snap on me. I have read a couple stories of the bolts snapping. What are the correct torques for the bolts?
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post #5 of 18 Old 08-11-2013, 03:38 AM
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If you want to replace all that stuff go for it but you may want to find out for sure where it's coming from. Anywhere there is a seal, is a potential leak. And really there is about 100 places above the lower rad hose that could be the leak.

Take some time and look around. You'll be doing yourself a favour. A good non led light (I find LED isn't as good for this) will help you trace the weep trails and find the leak.

Wouldn't you be upset if you replaced all that stuff and it was your flimsy thermostat housing or something? We've all done it, it's not a good feeling.

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post #6 of 18 Old 08-11-2013, 06:13 AM Thread Starter
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Seems that the colder it gets at night the more it has a chance to leak. So in my thought process that means that two pieces of metal(that are sealed when hot) are retracting when it gets a chance to really cool down. Maybe I will do the thermostat housing and reseal the heater tube and temperature sensor.
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post #7 of 18 Old 08-14-2013, 12:20 PM Thread Starter
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Ok bought the thermostat from ford, it has rubber around the outer edge. Bought the thermostat housing from napa it came with a three tab paper? gasket. Going to flush coolant tomorrow and change housing and reseal temperature sensor.
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post #8 of 18 Old 08-14-2013, 12:51 PM
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i have been having the same exact issue.
it doesnt really leak at all when driving but you come out the next day and its dripping a tiny bit.

im taking to back to the shop that did my waterpump to have them fix it.

i have verified it wasnt leaking anywhere else though.

do your truck a favor and get a billet thermostat housing from dieselsite. it is a high quality piece that will never leak again because it will never warp like the stock thermostat housing

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post #9 of 18 Old 08-14-2013, 02:02 PM Thread Starter
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Blu, let me know what tue shop says. It is so weird, I would assume if it was the water pump it would leak all the time. Hopefully this solves it
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post #10 of 18 Old 08-15-2013, 02:00 PM Thread Starter
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Went out this morning and there were a couple drops on the ground. Everything around the top of the thermostat outlet is dry looks like the seal between the pump and motor is leaking. The front of the pump is dry. Just orderd a pump from rockauto for 72 bucks.

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