C15 ACERT. Get it or not?

I have the BXS in mine. 435/1650 turned up to 500/1850,.. all stock parts with the exception of free flowing mufflers.

Approaching 1.4 million. 116k on inframe done last summer due to a coolant leak and not catching it before I ran the motor hot. Cracked the head.

With 10 spd, 3.55 gear, driving sensibly when loaded, I am seeing upper 5's with 6 - 6.2 mpg on a regular basis pulling 53' step deck. I did have the ECM tuned for efficiency,.. not all out HP.

Very very reliable motor. I am of the opinion that had I not cooked the motor I would still be rolling on the original. Oil change and filters are done every 12k.

BXS is one of the better in my opinion because there is no difference mechanically from the 435 - 550hp Mine has the 10spd with the aluminum bellhousing (1650trq tranny) CAT will not uprate the motor because of this. You would have to find someone else to turn it up if you come across one like mine. Most of the ones I have seen are of the 475/1850 variety which is all anyone really needs in my opinion.

If you are looking for fuel economy with the ACERT look for a truck spec'd with tall gears. 3.25 - 3.42 at most and preferably with tall rubber. The ACERT gets thirsty at high RPMs. The ideal cruising speed for an ACERT is 1300 - 1400 RPM. Its very comfortable at low RPMs.

Hurst

 

ACERT's according to most mechanics and owners I've talked to are a "lottery" motor. You literally won't know know if it's a gem or a dud. My company has several late model C-15 ACERT's and while they aren't a 6NZ or MBN, they do everything in their power to keep the good one's running.

The truck I drive has a 2006 C-15 NXS ACERT with 550/1850 and pulls like a champ. It pulls 137,500 lbs gross almost effortlessly for a 10-year old motor and begs for more all the time.

If you can get a strong maintenance history on the motor, I'd say it is easily worth it. They are fantastic when they work.

 

test the oil!!!

 

looking at a 07 International eagle w/ 800000 mi, rods and mains done @ 435000. Has a c15 cat acert engine. Any imput appreciated.

 

Someone wasted money on rods and mains. Should be good for another couple hundred thousand miles as long as it was taken care of.

 

Too many people are stuck in 1972.......

 

Maybe it snapped a rocker and checking how far debris made through engine.