'06 Pete 387 N14 rpms

N14, 3406, and series 60 were all million miles motors. Now everything seems to go about half that. My opinion is that they set the parameters to lug engines instead of winding them up. No, an ISX isn't an N14, and maybe you don't want to wind it as tight, but there's nothing wrong with running up to 1,800, if need be.

 

First, did you do your due diligence and have the truck actually checked out?

If you just had that done, not the whole process, you may not see that truck on the road as much as you need.

If your Pyro is high, bob tail it is either a defective K probe or something is really wrong with the engine.

 

Laughs in 318,

 

I'M SORRY, BUT I CAN'T HEAR YOU!!!

 

how did the dyno and what was the blowby reading?

 

Well, that's why you are at high risk for failure.

Looking at the blowby tube tells you nothing; the oil pressure tells you that it is running.

Having a dyno done tells you how much HP it is making, which matters because if it is below 85% of rated power, then there are issues. It could be anything from the valve to the injectors to the turbo.

While it is on the dyno, the crankcase pressure is measured under a full load at specific RPMs, which is called blowby; it tells you the condition of the rings and cylinders. It is used to determine if you have to get it overhauled or not.

I always recommend getting an ECM dump, a complete dump, so if you have to replace the ECM you have a record of it so they can set up a new one for you. While that's one reason, the other is to make sure there are no errors and the mileage, so you know it belongs to the truck.

I also tell everyone to get an Oil Analysis done on all the fluids, even if they have been changed; the sump carries a story at the bottom. THIS IS VERY IMPORTANT. From it, you know the condition of the bearings and the other parts.

See, trucks are tools, you want to lower your risk of having it break when you get it, it sits - you go broke.

 

Buying an 06 truck, you know you are doing the motor any way, pull an oil sample when you change it sure but put the dyno money to the 40-50k for an inframe since you are buying rolling cores

 

It always amazes me how many people think they shouldn't run a diesel engine past 1500 and that they are being hard on it if they do. I fully agree that most engine failures stem from running such low RPM. I say it all the time, and maybe I'm wrong but I don't think so, high torque at low RPM kills engines. It's hard on everything and low RPM is where most diesel make the most torque.
I come from the Ag word where these same engines run 1800-2000 RPM all day long.