Valley coolant leak? - Ford Powerstroke Diesel Forum
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Old 09-29-2013, 09:45 AM
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Valley coolant leak?

See if I can get some options for what might be causing this leak. Noticed it the other day when parked inside the shop to do some wiring. Didn't leak till the next day. It takes the path of down the valley and along the block head area then down the starter. From what it looks like it could have been doing it for a while since it parks in the gravel and never noticed. Doesn't leak when warmed up. Looked at the blue egr hose dry. It seems to be leaking at the oil cooler right where it meets the valley second bolt in from the egr connection. Also looks damp at intake from water pump but more so at oil cooler. Any help or ideas will be much appreciated. Thanks

2006 F-350 78,000 miles
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Old 09-29-2013, 10:59 AM
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Clean everything off with brake cleaner and compressed air so everything is dry. Go drive it and find your leak. It's probably coming out of the oil cooler cap where the coolant passage to the EGR is.
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Old 09-29-2013, 11:28 AM
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Going to have to go to the parts house and get some more brake cleaner. Cleaned up the coolant that was there. It only started with this cool weather and only after siting for 12+ hours. No measurable loss of coolant from degas tank but found some hair line cracks in it so that will be replaced as well. Truck runs amazing since adding sct from innovative and ditching the edge. If I need to tate into it I'm deleting the egr and rebuilding the oil cooler delta is 7-8 ect vs eot. Oil sits at 200-202 coolant 191-195. looks yellowish brown on the front underside of the intake manifold. I'll clean that up and see.
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Old 09-29-2013, 11:36 AM
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Keep us posted, if it's leaking out the oil cooler cap when you rebuild it the kit comes with every seal in there so it should take care of it. When you get that stuff done invest in ELC coolant and a coolant filter also. Good luck!!
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Old 09-29-2013, 07:59 PM
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So I cleaned up the whole top end and drove it around. So far no sign of a leak. Already have a coolant filter. Also what's a good upgrade to the coolant. Will start the process mid week when I get home from work. Thanks for the help. I'm thinking its an o-ring due to leak only happens when cold. Just what one. I don't want to rebuild the oil cooler if its just an intake o-ring. Is the ect vs eot in need of a rebuild? I am only seeing a 8-10* split and noticed with the new tuning the egr valve never opens. I live in the hills and can be from 900 ft elevation to 5000 ft elevation within an hour. No flat ground to test but when I did this past week I saw the 8-10* at 65 mph
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Old 09-30-2013, 05:27 AM
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Ya 8 to 10 is starting to plug up a spanking new one will run about a 3 degree delta. It's definitely not an emergency change it right now but it's getting there . Any kind of ELC coolant will work. I use Final Charge HD. Just make sure it's silicate free
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Old 10-01-2013, 11:40 AM
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Since the clean up of the valley on Sunday I haven't noticed any coolant leaks. When I go home tomorrow from work I will take a look and update. (48 hours non start up) I put together a list of parts to see if I'm heading in the right direction.

IPR EGR GEN2 Delete and oil cooler $668.10
Delo ELC concentrate $19.07 /Gallon
Gates heavy duty fan belt $55
15w-40 Motocraft $17.20 1.5/ Gallon
Dorman Degas tank $42.50
Distiled water $0.88 / Gallon

I haven't found a price on cleaner for the flush yet. I am hoping its a o-ring and i don't need to do all this work at this time but its a good start if i have to. SCT has EGR turned off. Also i like to use ford parts but is the Dorman degas tank and Gates belt ok to run due to price?
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Old 10-01-2013, 11:46 AM
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Ya that stuff will be okay to run I would run a factory cooler from ford though. Out of all of them, I've had the best luck with them as long the coolant is ELC and filtered.
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Old 10-02-2013, 05:24 PM
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The IPR cooler and delete kit is supposed to be a ford oil cooler. Anyway I got home from work and took a look and there was the coolant leak again. 48+hour no start. Looks more like its coming from the o-ring at the intake from the water pump. Oil cooler cover is dry. So whats my next step? $840 in parts and a few long days? Or try to lift the intake and replace the o-ring?
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Old 10-02-2013, 05:41 PM
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Quote:
Ya 8 to 10 is starting to plug up a spanking new one will run about a 3 degree delta
Who told you that? He is fine. He could also have a sensor misreading a degree or 2.

Quote:
So whats my next step? $840 in parts and a few long days? Or try to lift the intake and replace the o-ring?
How about recheck the torque on the intake manifold. Sometimes the bolts come loose due to the low torque values. If it still leaks, you have a decision to make. If it is just slightly wet, you don't need to fix it right away.
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