Where is this leak coming from (PICS) - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 02-19-2012, 11:08 AM Thread Starter
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Where is this leak coming from (PICS)



I have had this leak for a couple months now, that I've noticed, and I dont know where its coming from. My coolant level has not been touched in the last 5k miles and is still on the max line with no puking signs. My oil is still full since the last oil change at just about 5k miles ago. My power steering and brake fluid is perfect. The only other fluids I can think of are frion from the AC, diesel fuel, trans fluid which I doubt, or washer fluid. It only leaks when the engine is cold(not running) and sits for awhile and theres a dried up fluid spot on the ground after two days of sitting about 5" in diameter. But what fluid dries up and leaves a white residue.

It's the passenger side manifold and this is the only spot on both manifolds that has this white residue on it.

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post #2 of 16 Old 02-19-2012, 11:29 AM
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The only thing that leaves white residue is coolant. Check you EGR cooler hose or if you have a delete, that hose. Also check the oil cooler housing for it to be leaking. Then check your heater core hoses and quick connects.

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post #3 of 16 Old 02-19-2012, 11:31 AM Thread Starter
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Thats what I thought but like I said my coolant level hasn't budged. Its still perfectly at the max level like its been since I checked 5k miles ago.

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post #4 of 16 Old 02-19-2012, 11:37 AM
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Coolant leaves a white residue when dried. Your heater heater control valve and lines are in that area.
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post #5 of 16 Old 02-19-2012, 11:41 AM
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Check the lines from the degas bottle. If they're plugged, you might not have coolant leaving it.


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post #6 of 16 Old 02-19-2012, 11:46 AM Thread Starter
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Quote:
Originally Posted by tonwe View Post
Check the lines from the degas bottle. If they're plugged, you might not have coolant leaving it.
How would I check if they were plugged or not. And wouldnt this make the temperatures rise. My temperatures actually stay a little low. Coolant temp while cruising is like 185

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post #7 of 16 Old 02-19-2012, 11:52 AM
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Five drops at a time would take a while to show on a seven gallon system.
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post #8 of 16 Old 02-19-2012, 11:59 AM
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I see you have a Dieselsite coolant filter the T that goes into the heater line some are starting to go bad they are a push in tight fitting the new ones are threaded. I had to get a replacement after having it 3 months did i have to pay for a new one YES price $15 plus shipping last thing i will get from them. If that is the problem the part number is cft6 Tee for 6.0L Coolant Filter - upgrade price $15.00+ Shipping also i have his boots another joke missed one steel ring $8.50 a 44cent stamp would have worked but no way $13.65 on shipping another joke.
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post #9 of 16 Old 02-19-2012, 11:59 AM
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I'm not sure, but that's where I would start. Maybe by pulling a couple or just checking for flow while it's running? If it is plugged, maybe that's why you haven't seen any drop in the level. Also, if your temp is that low, I would be replacing the thermostat. They don't start to open until 188*F and fully open at 203*F. Sounds like you're due to replace yours.


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post #10 of 16 Old 02-19-2012, 06:47 PM Thread Starter
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Quote:
Originally Posted by 2 stroker View Post
I see you have a Dieselsite coolant filter the T that goes into the heater line some are starting to go bad they are a push in tight fitting the new ones are threaded. I had to get a replacement after having it 3 months did i have to pay for a new one YES price $15 plus shipping last thing i will get from them. If that is the problem the part number is cft6 Tee for 6.0L Coolant Filter - upgrade price $15.00+ Shipping also i have his boots another joke missed one steel ring $8.50 a 44cent stamp would have worked but no way $13.65 on shipping another joke.
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Yeah I've caught that T joint leaking before but I just tightened the hose clamps and that seemed to solve it. I'll look in to getting a new joint though since I need to order some new filters for it anyways.

Quote:
Originally Posted by tonwe View Post
I'm not sure, but that's where I would start. Maybe by pulling a couple or just checking for flow while it's running? If it is plugged, maybe that's why you haven't seen any drop in the level. Also, if your temp is that low, I would be replacing the thermostat. They don't start to open until 188*F and fully open at 203*F. Sounds like you're due to replace yours.
Alright this might be a stupid question but whats the best way to check if the coolant is flowing. Also I keep reading about everyone replacing their thermostat when the temps get in to the 180's but isn't that just due to the ambient temperatures being cold outside. Then the engine can't get up to 190. When the temperatures outside get in to the 60's my EOT and ECT temps get to 190. But with outside temps being in the 40's right now it just doesn't quite make it there.

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