I drive a T680 with a PACCAR engine for my boss. It has less then 20 thousand on it. Its been leaking antifreeze ever since we've had it. Its got such a slow leak that their is no puddle under it. We check the oil every time before we start it, its always the same... Its been to our local dealer three times and they never find anything. Has anyone had this problem? Is it normal since its new still? Anything would be great!
2014 T680
Discussion in 'Kenworth Forum' started by LittleBigRigger, Oct 14, 2014.
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Drop the oil pan and check there for the missing antifreeze. I had a vehicle once that was losing antifreeze but no signs of where it was going. Even the shop could not find the leak. Once the pan was dropped everyone knew where the fluid went.
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If it's not coming out , it's going in! Most likely a EGR cooler. Any coolant being burned will quickly ruin the DPF .
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There was a check engine light that did come on the other day. I was looking in the book and it said it had to do with emissions control. It did mention the DPF filter. What does that do exactly?
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Did you check all of the clamps in the cooling system for being tight? Had the same problem w/ my 2014 Pete w/ a n ISX. No drips or evidence of a coolant leak, thought it was going into the after treatment system. Turned out to be a loose clamp that only leaked when the engine was warm and wound up a bit under load. Not much of a leak, but I guess a few drops an hour adds up....
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Mines in shop now 2nd time. Losing a gallon every 3 days. Looks like a tube on pass side frame.
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With less than 20k, it'll be a warranty matter for Kenworth to deal with. Aside from the aforementioned, the two coolant lines to the DEF doser often go overlooked.. be sure to check those, as it's not unheard of for leaks to form there. Don't know if yours has an APU or not, but where the coolant line connects to the APU always seems to be a trouble spot for our trucks, as well (T660s and T680s, both). And, if you do have an APU, also check inside the APU.
The PACCAR engines have a bit of notoriety for running through EGR coolers, although a lot of changes were made to the 2014 engine (perhaps the first one I noticed was the placement of the dosing injector), so I can't really speak for the current models.
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