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Old 08-07-2010, 10:57 AM
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Internal coolant leak?

I had my upper radiator hose changed a few weeks ago because of a leak. I checked my coolant level today and it is already about a half inch lower then where it was when I got it back from the shop at the dealership! Iam almost positive I don't have coolant leaking externally! I don't know much about engines! Is it possible for coolant to leak internally into something like your oil or whatever? Iam loosing coolant somehow and have been adding coolant every now and then for the last few months. Just finished off a jug I bought in may!
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Old 08-07-2010, 04:37 PM
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You guys should post the year,etc. of your truck. We don't know what to say. If it's an 08 like mine they had to have different things done to upgrade to 10 specs. I kept loseing coolant and it ended up being radiators,thermostats,egr coolers,waterpump. I believe they are related because of the first issues. The coolant didn't make it into the oil. Just bubbled out of degas and radiator. Never saw coolant on the ground.
Get a Blackstone analisis done to find out about coolant in the oil.
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Old 08-07-2010, 06:06 PM
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My truck is an 08 f-250 cc. Job 3
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Old 08-08-2010, 05:33 AM
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It may be it just had air in it. I would top it off to the cold mark when cold in morning and see if it holds to the mark every morning when cold and never above the upper mark when hot. I know on freezing mornings the coolant level drops a little but not as much as 1/2. Make sure it isn't going above the high mark as well when good and hot. Mine mostly puked out coolant when towing a light load but was always down below the cold mark running. I'd add some coolant and it would disapear.
Make sure your Venturi Tee is in right. Mine was in backwards. Can you get it into the dealer to have him test the radiators? I had to have two of them. Better yet get the Blackstone report done so you will be relieved it's not in the oil.
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Old 08-16-2010, 05:16 PM
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Angry lnternal coolant leak?

I have being adding coolant about a gallon every 120 miles for 3 days now, I can see some markings under left side of engine but no coolant anywhere, and it sputters when first started, but yet pulls a 10,000lbs trayler smoothly. can anyone tell me what to check for. it only has 49000 miles
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Old 08-17-2010, 04:19 AM
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Got warranty left?Get it to a dealer fast.
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