Spews coolant (sometimes) - Ford Powerstroke Diesel Forum
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Old 06-14-2010, 11:53 PM
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Spews coolant (sometimes)

After much reading, I'm not sure if my truck is unusual or just unlucky. I have a 2008 Job 1 Super Duty, that has now all of a sudden decided while pulling any sort of grade that it wants to spew coolant everywhere. It doesn't leak coolant when parked, doesn't run hot and doesn't leak riding around town. The truck has 25,000 miles and does towing, DD duty.

To preface this: it has an SCT tuner with a DOC/DPF delete left on transmission only when towing. I don't drag race the thing or anything, I did the delete because the mileage sucked. The truck has never run hot, nor ran hot when it leaked coolant. It has the venturi-t installed and to this point hasn't had any significant problem.

So after the first incident (where I lost about 2 gallons of coolant) I took the truck back to Ford, where they replaced the upper hose. I'm thinking everything is fine, so I tow an empty trailer to Reno and back - no leak for the trip there and most of the trip back. The coolant is concentrated on the leaf front frame rail area and near the middle-top of the radiator (along with the whole side of the truck from this occurring at highway speed).

I get back to the Bay and the damned thing has leaked coolant. So I took it in, and the dealer said it's a degassing cap, which they replaced. I had trouble believing this was the problem.

I've since returned everything to stock at the recommendation of the service advisers (who are pretty cool come to think of it) to go in and make Ford fix this thing. It doesn't act like a blown head gasket or anything, but again I'm not taking any chances in the Ford-Navistar pissing match that is going on.

I've read all the Job 1 radiator threads, so I'm thinking this could be the problem, but I wanted to confirm that others were having similar intermittent leaks.

Thanks for your input!
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Old 06-15-2010, 04:48 AM
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If the radiator leaks you will see it on the side of the radiator and below it. If the coolant is coming from the degas bottle, most likely the head gaskets or EGR cooler.
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Old 06-15-2010, 07:59 AM
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It's on the top and left side of the radiator. I've had a cracked tank on a radiator before and it acted very similar to this which is why I'm asking. I think my dealership was just apprehensive about throwing a new radiator at the problem.

Oh, and there's no white smoke out of the tail pipes.
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Old 06-15-2010, 09:17 AM
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Sounds like the radiator for sure.
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Old 06-15-2010, 09:55 AM
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Quote:
Originally Posted by FordFascist View Post
It's on the top and left side of the radiator. I've had a cracked tank on a radiator before and it acted very similar to this which is why I'm asking. I think my dealership was just apprehensive about throwing a new radiator at the problem.

Oh, and there's no white smoke out of the tail pipes.
Thermostats could also be bad causing the repeat failure.
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Old 06-15-2010, 11:14 AM
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Quote:
Originally Posted by dieselkane View Post
Thermostats could also be bad causing the repeat failure.
That's what I was thinking as well. Mine is of the infamous job 1 build, so it's very possible that it has a bad radiator, bad thermostats and a bad upper hose.

I've put the DPF back on and reflashed it back to stock, so the service adviser said he is less apprehensive about finding a problem. I'm still thinking it in the cooling system, because a head gasket on something with this much boost would blow out every time I got the boost gauge up.

I guess I'll find out soon enough.
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Old 06-16-2010, 09:58 AM
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Got a call from Ford today, and they say they've tested it exhaustively and cannot see it building too much pressure nor can they find the leak.

I have confidence that as soon as I hook a trailer up to it I'm going to see coolant all over the side of my truck and trailer.

I guess we will wait and see.
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Old 06-24-2010, 06:06 PM
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hey,

exact same thing is happening with my job 1 (may of 2007 build date). I took it to ford and they replaced the hoses, degas bottle, cap, and new thermostats.

I had the work done about 6 weeks ago and retuned the truck 2 weeks ago with sct and dpf delete.

today, i smelt a sweet smell so i opened the hood and saw white stuff all over the hood and engine compartment- i took off the degas cap and checked the coolant and it still looks brand new- no spotting from oil or diesel fuel.

any help would be appreciated
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Old 06-24-2010, 07:47 PM
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I"m in the same boat.. I have a Job 1 F350 (march '07), and I spew coolant when I tow. I don't know if it is head gaskets, EGR coolers, or something else.

I am leaning towards head gaskets because it seems to be when I have high boost that it leaks. I figured that with leaking EGR coolers, I would be getting coolant into the combustion chambers, and out the exhaust.

I have been running various tunes anywhere between 210 and 310 for a while, so head gaskets are a definite possibility. Right now, I run the 210 tune, and haven't been towing, so it hasn't been a pressing problem.
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Old 06-27-2010, 06:48 PM
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I towed with it this weekend and it's leaking out of the degas bottle. It doesn't leak when I'm driving it around normally or when I'm at full boost. I'm under the impression that a headgasket would have many other associated problems than just coolant spraying out bottle.

I'm thinking it's something related to the EGR coolers or EGR valve because it's dependent on continuous high EGTs. I can peg the boost gauge now and then an it doesn't blow anything out.

There's no water in the oil, and no combustion gasses in the remaining coolant so I'm at a loss.
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