ISX pucking coolant

1st place to triple check is egr cooler. Maybe remove egr pipes and look for some sign of coolant going through there.

 

U can run the truck untill its at normal operating temp . After that take a bottle of water and put the overflow tube of your radiator in the bottle , if it blows bubbles you have pressure building in your system. I would be careful of head gasket,head, and lots of other expensive things that may not be visible to you. This is an old school way to see if a truck was pushing water but on the newer isx can be other things im not as familiar with

 

Did they change the pressure cap when they put on the new surge tank??

To quickly test the egr cooler, just remove the pipe that is on the outlet of the egr cooler and check for coolant. If coolant is found, the cooler will need to be removed and pressure tested to make sure it isnt internal engine.

 

I don't want to be the bearer of bad news but I'm willing to bet its the head gasket. There is a week spot on #5 and#6. I just had 2 done. Both 2010's , 1 550 and 1 600. Both had between 250k and 260k mi on them.
Now for the good new ( if that can be considered). As long as you have under 500k it should be warrantied. Usually the liners are down around .005-.006, the warranty procedure includes cutting the block, putting 6 new liners in set at .012-.014. I would contact your nearest cummins dealer and have then diagnose it. I believe there is an open TSB for the problem. It seems to be more an issue with the bigger hp engines, 530hp and up. Get it looked at soon as if the build date becomes too late they may not cover it!!!
Good luck

 

All I can say that its either one of the coolant engine pipes cloged in or ot is bad egr, or egr coolant.and about turbo actuator if its working normalu and moving, then it could be finges inside exhoust turbine stuck or not working properly I bet you have bad engine brake which is when you turn it on, wont feel the thing just a noise change.

 

2009-2010 ISX's are known for bad EGR coolers. But they quietly eat your coolant by letting it go out the exhaust and gradually gets worse over two month's time. It doesn't push it out the overflow. I think it's the gasket design. When total EGR cooler failure happens your cylinders will fill with coolant and the engine will hydrolock. I was one of the first 2009 ISX customers to experience this pleasure and Cummins sent a team out to inspect my problem. They should of had a recall but played it off. I'd say that problem has already been fixed on your truck. It usually happens in the first year. I had my new truck about 7 months when that happened. If you are sure the coolant is going out your overflow then I wouldn't think this is your problem. Can't the dealer pull up the repair history on that truck? It would have been a warranty repair.

I would think yours is getting hot for a number of possible problems. Is the radiator clean? A dusty environment will clog them vanes up where it can't get good airflow.

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.

Three years old you are probably getting near your first water pump change. Most times a water pump bearing will wear out and eventually the seal. But I have seen them where the vanes wear down to nubs and they start captivating and circulation is diminished.

A bad head gasket is obvious if you already checked for bubbles.

 

I've got a similar issue with a pre-egr Cummins.

A couple weeks ago the truck I am assigned to for one customer of my company took a dump on the side of the road with a fuel issue, got it back to the shop the company uses and they get it running again. A few days later it starts leaking coolant and takes two gallons a day so back to the shop it went as I was reassigned to another customer for a week. I told them it is a head gasket because of the way it was leaking - in the back of the engine. By the way, this engine never ran hot but had an even temp on the gauge even if fully loaded and going up hill.

So this week I'm back to that customer with a new Ryder rental truck for me to use. I was told to pick up the truck Tuesday, it is fixed and ready to go. I drop off the Ryder rental back at Ryder, take a cab (with all the chains, binders and other stuff) to go and pick the truck up. I drive off in the sunset to take it to pick up my light load (28,000 lbs of dies) of the day and then head back to the company. I get 10 miles from the shipper loaded and it starts overheating. I pull off the freeway and into a safe place. While I am sitting there to let it cool down, I am listening to the violent bubbling of the coolant and then it starting to gush out of the overflow tube on the overflow bottle - it threw out almost 5 gallons. I had to wait four hours for a tow, another three hours in traffic to get it back to the company, and the next morning another driver took it to the shop to get worked on after putting in 5 gallons of water. I heard this morning that they replaced the water pump (I will tell why in a moment) and it was ready.

This afternoon I took the other driver to pick up the truck in my nice new Ryder rental, I had to make a pick up and he had to go to that same shipper I went to on Tuesday to pick up another load of dies to be reworked. I mentioned to him that first I don't trust the parts changer or the truck at this point until it is properly fixed and that if they did the work in the first place and replaced the head gasket, there wouldn't be this issue. We load the truck up with the chains, binders and all the other stuff and I go on my way to pick up my next load. When I got back, he is right behind me in the company van with all the chains, binders and other stuff off the truck. He made it 6 miles and the truck overheated and started spitting out coolant. He decided instead of towing it back to the shop, he would drive it which took him three hours.

Now here is what I am told why they replaced the water pump. When I mentioned the leak, the owner of the company was told about this and passed the decision making onto the machine shop manager who didn't want to "dump money" into the truck so the mechanic dumped stop leak into the coolant system to stop it from leaking. The mechanic said that water pump was ruined by the stop leak and it stopped pumping coolant, blowing the water pump to heck. So I told the owner today I have never had this happen when a water pump failed but I have with head gaskets explaining to him why the water pump doesn't pressurizes the coolant system when a water pump failed, it just leaked at the water pump. I explained to him that there is all indications that the catalytic converter (this truck has it on it for some reason and no one can tell me why) is plugged by the way it acts and it is part of the problem.

This afternoon when I was getting ready to leave, the mechanic called the machine shop manager and said it was the fan clutch that failed. another thing that I never ever heard the truck use, even on hot days with a full load. So I expect to get the truck back and end up on the side of the road again.