The new C15 acert engine

Columbus, OH

#542 Jun 17, 2011
just to add that this engine is has 435 hp and 8 top 2 shifter is this HP upgradeble or not
Thank you
Chris Young JAKE BRAKE

Whittier, CA

#543 Jun 29, 2011
I have a 2006 acert c15 and it is total junk!!!
250,000 engine ran away due to turbo failure and burnt whole engine up.
200,000 miles later,#1 rocker arm breaks,and #6 injector busts filling my crankcase full of diesel fuel. 4 days later 2 more broken rocker arms,and another bad injector,I now have metal shavens in my oil. 1 burned valve,and cam shaft is scratched to hell!!!
DETROIT DIESEL is your best choice,for trucks that you cant get a detroit in,get the cummins ISX,their a die hard engine!!!
CAT'S SUCK ever since 2003 on

Wheeling, WV

#544 Jun 30, 2011
Yeah I just had the same thing happen to me yesterday.#3 rocker arm broke and left me sitting on the side of the road.I just had mine rebuilt about 70,000 miles ago. They don't replace rocker arms on a rebuild.They just check\ inspect them and put them back in.Luckily mine was under warranty and they replaced both of them on that cylinder. But I still lost a days work and if I did'nt have tow coverage on my insurance I would have had to pay the 650.00 tow bill.The same thing happened on my brother-in-laws cat too about 6 months ago.You're right these motors are total junk.Something needs to be done about this.
Truckers Wife

United States

#545 Jul 4, 2011
Is there a special tool that has to be used torque/adjust Jake Brake on MXS C15 Acert Engine, if so, what's it called?
big blue

Olmsted Falls, OH

#546 Jul 7, 2011
im sure there is a genius out there that has fiqured out how to bypass the regen system on a cat C-15 i would be very greatful for your knowledge

Washington, DC

#547 Jul 12, 2011
Doug wrote:
Does c/15 have special muffler,with catalyctic converter built in.Someone mentioned that to me.would like to put free flow on to reduce back pressure.anyone know who makes one.Mine is a single under cab and exhausts to 2 side pipes
how many miles per gallon do you get with a 550 C 15 caterpilar engine

Alachua, FL

#548 Jul 20, 2011
I have a CAT C-15 love the eng, Hate Dpf in the shop for dpf every month
have replace 3 ARD heads just turn over 400k miles is now in the shop for
regen switch 68 dollars plus labor ,
Setting my appointment for next month DPF problen comeon CAT let fix this
love your ENG

United States

#550 Jul 26, 2011
We bought a used 06 Freightliner OMG can I say junk! Bought it from Selectrucks in Charlotte NC just so we would have warranty on the truck, What a joke. 35 days after we purchaed it a $2000 bill hit us from Freightliner in Charlotte NC for studs that needed to be "updated" 6 weeks ago and exhaust rocker arm busted, after tow, another $1000 dollars spent, now we are sitting in Dallas with another broken rocker arm, and this one took out the cam. Wish we had done more research on the newer dual turbo C15 horrible horrible choice, sad for Cat to have this engine connected to their name, give me our Detroit back!!!!!!
Mike the Greek

United States

#552 Aug 4, 2011
cat 3406 was good engines except the electronic part of it last one I had 1.5 million miles and was running like a champ.

Since: Sep 11

Bridgewater, Canada

#553 Sep 14, 2011
Need diagram of fan belt for a c15 cat motor in a 2005 379 peterbilt.can't figure it out

Medford, OK

#554 Sep 20, 2011
Anyone know what a diverter solenoid is?

Saint Charles, KY

#555 Sep 24, 2011
im looking at an 05 pete 379 with an c15 acert in it the truck has a mill on it. the motor was majored at about 750. the motor is dry,clean and have all history.Is this a good motor, can it be turned up from 475 and does it pull like a cummins, thats all ive ever owned, any advice would be much appreciated.
Army Wrench

United States

#556 Sep 26, 2011
I can tell from personal experience in the military. We've run the Detroit 8V92's in our heavy tactical vehicles. They were moderately durable, horrible on fuel economy, and dreadful with turbo lag. Our Oshkosh Trucks ran a turbo on top of the supercharger, and when you had a sizable load, good luck taking off from a dead stop. The Army has moved away from the Detroits to the CAT C15 ACERT motor. It's the best move they've made in while. The CAT puts out loads of torque and on demand too. It's night and day compared to the old 2 strokes. Fuel economy on these are moderate in our tactical vehicles. I personally have yet to see trending shortcomings of this engine, but I haven't been let down yet. I'm not here to say which brand is better, only what I've experienced. Hope this helps!
David Hiller

Ottawa, Canada

#557 Sep 28, 2011
Hey everyone with CAT problems. Get rid of the DPF before you go broke. There are delete kits available and makes the CAT engine run great.
Email me at [email protected] for more info
David Hiller

Ottawa, Canada

#558 Sep 28, 2011
2005 Pete would be a great truck. I would take the twin turbos off and put a single turbo on. Run the bully dog tune and the ported/tuned manifold, with the single turbo. This will gain 1 to 1.5 mpg!! a truck worth keeping, a truck worth buying.
Questions, email me at [email protected]
David Hiller

Ottawa, Canada

#559 Sep 28, 2011
We can get rid of your "Re-Gen" problems. Cat engines getting 7 mpg again. Cummins and Detroit's also. Turn your 2008 - 2010 trucks into Money making trucks again, with out the cost of going new.
Email me at [email protected]
David Hiller

Ottawa, Canada

#560 Sep 28, 2011
On any engine, you need to be putting a 1 micron by-pass filter on. This is a must. Every engine only has a 20 - 25 micron oil filter on. That means that everything smaller that 20 micron stays in the oil. With our 1 micron filter you keep the oil CLEAN! This is a must. Kleen oil is a great one. Also you should be putting Motor Silk in the oil compartment twice a year. This will fill all the little PIT marks in the metal, giving you a well run engine. Also run a good cleaner/lubricant through the fuel, Motor Silk also has a good product for this. This will help reduce your operating cost on your engine.
More questions, email me at [email protected]
HoT rod 382

Providence, KY

#561 Sep 30, 2011
My 15 is up to 550,I would like to get it to around 8 or 9. With about 21-2250 trq. Help me. It is a acerbic motor ,but it's been almost perfect. Any advice would be much appreciated!!!
HoT rod 382

Providence, KY

#562 Sep 30, 2011
I'm also gonna go with the p power box. Oh and to David hilier,so SPF delete,straight pipes and ur off to the raves huh.
oscar flores

Taylorsville, NC

#564 Oct 1, 2011
well i have a c15 accert engine 06 peterbuilt well speaking of engine i have no complaints. It has right now 670,000 miles and have done my best to perform maintenance and overhead every 100,000. ofcourse i have changed out my air filters at 50,000. to me this is a great engine only thing i have done since brandnew is change out the fanclutch and waterpump. a couple of recalls done in holt caterpillar. for those complaining about no take off, you are pulling from the start with 3.36 gears 13 speed, how fast do you think its gonna go at take off, please get real. keep this engine at 1300 to 1400 rpm and thats the sweet spot on this engine. when shifting dont let it go over 1500 rpm, that helps alot

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