2013 ISX15 CM2350 EGR Tune & Coolant Leak

[kozakvod]

So I'm quite new to this engine and finding Rawze's forum has a been a God send for sure.

We purchased a 2014 Pete in Nov. 2017, with a 2013 ISX15 CM2350 engine. What I do know about the truck is that it was well maintained, very clean, in and out. What I now know, thanks to Rawze, is that the EGR Cooler, Doser, and Nox sensor had be replaced, but specifically when, not sure. Yesterday, I replaced the IMAP sensor, considering how caked up it was there's NO WAY it was closely doing its job. Today I will replace the DeltaP and EGR Temp sensor.

Now here's my question, the intake on this engine is significantly larger than the one in Rawze's video that he removes and cleans, mine runs almost the length of the engine front to rear. SHOULD I remove it and clean it? It appears to be quite daunting and I want to make sure I'm not going to open up a "can-of-worms" in the process.

Also, I have a coolant leak, somewhere. I smell it, but can't see it. I did have a leaky coolant filter gasket and thought that was the problem and I replaced it, but I'm still smelling coolant. It's leaking to the tune of maybe a gallon per month/month and a half. Of course my natural concern is the EGR cooler, but again, it was replaced, that's obvious because it's not Cummins red. Any suggestions would be most appreciated.

Finally, I had been getting a "High Fuel Leakage" fault, it stayed on a day or so and went off, then back on a few days later, then back off again, etc. Had no visual fuel leakage at all, nothing. Truck was and continues to run fine, no lag. As I don't have Insite software, I took into the shop for them to hook it up to the computer. Initially, they said they did get a pressure drop, but digging further into the investigation found nothing leaking, but did find out that the ECM was requesting updates. They installed the updates, I drove for 3 weeks or so, same fault comes back again, but again, goes off. I was told that fault could be caused by a number of different things, don't know if that's true or not. Only thing I do know is that I'm not loosing power, i.e. a bad injector or fuel pressure loss, etc. Anyone have any ideas about this?

Thanks in advance for any and all opinions.

[Waterloo]

How about the fuel pump? You do know about that? Has it been rebuilt? If you don't know and or there is no record of it being rebuilt, that would be the very next thing I do with that motor, rebuild that fuel pump as you don't want to go there if that thing fails.

[kozakvod]

Don’t know about fuel pump rebuilt status.

[Rounded_nut]

My engine! Ok, I had that same code, you want to do a injector leakdown test to see how bad it is, probably pretty bad. Now I ended up going to cummins to buy an injector isolator tool so I could plug the high pressure line between the rail and injector, turned out to be a very leaky injector, BUT I also had an injector spill valve leaking too so ended up replacing two. As far as coolant leaks, I have a cold engine leak from a hose on the passenger side inside the frame rail, ultimately replace any crap band clamps with constant torque clamps to solve those little pains in the ass. Now I have been deleted so it could also very well be the cooler, but I couldn't help you with that. IF I remember correctly cummins says a little soot is just peachy in the intake, but honestly I wouldn't think it'd hurt to pull and clean the snot out of it, check quickserve online for the instructions, seems the biggest hassle is the other lines connected to it, and it looks a bit heavy.

What model Pete?

[kozakvod]

388 is the model.

Thank you for the info, helpful for sure. Waterloo got me started going down the road regarding the fuel pump and geezzz, everything I've read about that thing sounds like a spiral death of destruction. A leaky injector sounds like a really good problem to have in light of a fuel pump issue.

Regarding the coolant leak, every sensor I've pulled has been dry, but surely sooted up. I can't find signs anywhere of wetness inside so while it COULD be the EGR Cooler, I'm sort of leaning against that direction currently. I don't believe it's a cold water leak simply because I smell coolant and various times, all the time. I did have a bad gasket on the coolant filter that was leaking cold, but that was fixed and still smelling coolant.

[Chamberpains]

Not all coolant leaks look wet or have remnants of the coolant where it's at. Like a coolant leak external on a head gasket will oftentimes look like a rust Line running down the head on the exhaust side because the heat of the exhaust Burns off the coolant as it drips out.
Here's what they commonly look like if the heat around the leak is high enough to evaporate the coolant.

[kozakvod]

Yes I’m aware of those type of leaks. Sadly, doesn’t apply in my situation as those evaporated rust runs don’t exist. I wish it were that obvious though.

[Dtruck]

Get yourself a cheap pressure tester and test it with the truck off. Look at those hose clamps closely. My newest truck came with a leak at a clamp. You could never see it running.

[Magard]

Have you thought of going zero pressure in your radiator. I’m not sure how viable it would be on your truck but it worked good on Volvo. Not for everyone I guess but check it out.