But I have seen them where the vanes wear down to nubs and they start captivating and circulation is diminished.Ī bad head gasket is obvious if you already checked for bubbles. Most times a water pump bearing will wear out and eventually the seal. Three years old you are probably getting near your first water pump change. The same with the inside is your cooling system clean with scale build up? Scale build up reduces heat transfer where the system can't do it's job. Is the radiator clean? A dusty environment will clog them vanes up where it can't get good airflow. I would think yours is getting hot for a number of possible problems. Can't the dealer pull up the repair history on that truck? It would have been a warranty repair. If you are sure the coolant is going out your overflow then I wouldn't think this is your problem. I had my new truck about 7 months when that happened. I'd say that problem has already been fixed on your truck. They should of had a recall but played it off. I was one of the first 2009 ISX customers to experience this pleasure and Cummins sent a team out to inspect my problem. When total EGR cooler failure happens your cylinders will fill with coolant and the engine will hydrolock. But they quietly eat your coolant by letting it go out the exhaust and gradually gets worse over two month's time. Any thoughts? Anyone have anything similar happen? Thanks in advanceĢ009-2010 ISX's are known for bad EGR coolers. Both radiator caps were replaced with the new overflow bottle.I need to get this figured out soon for many reasons, but mostly so I can get the dealer to take care of it under warranty. No sign of coolant in the oil or on the ground after shutdown either. I checked the coolant the other day after an 8 hr shutdown, and there was still pressure in the cooling system when I pulled the cap, so I don't think that coolant is being pushed somewhere after shutdown. To me it seems to be pushing boost/exhaust pressure into the coolant, but they say no.
I believe it does it when I get a good load on it and pull a steep hill, but my coolant temp never gets over 210degs, fan works well,etc. The truck does fine one day with no coolant loss, and then the next it will push coolant out twice in one day. The dealer where I bought it has replaced the coolant overflow bottle, and the complete turbo, and they have supposedly checked the egr cooler, and air compressor, and the head gasket, but they say they are all good. (this is a 2010 kwt660 with a factory 550isx by the way). Then it was a clogged dpf mystery., now it is a problem with the coolant being pushed out the radiator cap.
First it was acheck engine light on and a new turbo actuator. I have only owned this truck for three weeks, and have never had a trip without some sort of trouble.
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