high mileage ISX.

fist that fails is EGR valve and EGR cooler. Injectors fail rarelly, but actuators may be worn causing rought idle.

I advice you do all tests with Insite software before a deal.

 

Like pablo said EGR valve and cooler will go, EGR diff tubes also. Internally it seems to be a great motor havent hardly seen any major failures

 

aha! I've forgoten to say about EGR sensor.. replace it with EGR!

Ouh! do not purchase EPA2010/Euro-V engines with AD-Blue! It is a big problem!

 

We have around 20 ISX's like said before EGR coolers, EGR valves, they eat up turbo's, turbo actuators, etcc, if something happens internally 9 out of 10 times it will destroy the entire motor. My addvice get a pre EGR ISX or get a 2010 model where they moved the EGR over to the cold side of the motor, they do not have nearly as many problems. These motors get good fuel mileage and pull decent. Just my 2 cents.

 

Another thing is these motors have hardly no oil pressure it can drive you crazy if you look at the guage long enough

 

The EGR is not a real problem if you have the ingenuity to get around it. Have had the EGR blocked at the intake manifold for a long time. Did start to get a couple of codes a while back. Yep, EGR valve took a dump. No problem, it is still on there and will not get replaced. No change in performance and still in the mid to high 7's mpg average. Oil samples still good and no other issues. 630,000 miles on the engine and the EGR has been essentially non functional for the around 230,000 miles. One heck of a lot less soot. Oil doesn't even start to darken up until it has around 5000-6000 miles on it. Soot levels on oil samples at 25,000 miles around 1%. Since the EGR has been blocked, wear metals dropped almost 2/3 less than before I dealt with the EGR. Even when I did this while still under the 500,000 mile warranty, Cummins could care less. I had the engine in for a couple of non emissions related issues that were warranty covered and Cummins honored the warranty even though they knew what I had done and, in fact, I had discussions with the techs about it while I was there.

Now, all this being said, I would have to side with the comment that a pre-emissions ISX or even and N-14 would be a better choice. But the trucks they are in are usually beat up by now. A new glider kit truck with one of these engines would be the best way a person could go. Mine is a 2005 built ISX in a 2006 International 9400i.

 

Ok, so I'm not crazy then. I always thought the oil pressure was low pinging between 30-40 psi. For some reason I thought the pressure would be a little bit higher and maybe I had a problem... And I've pointed it out to our mechanics at our shop but they just say it is fine (but don't really know what the normal operating pressure is!).