Caterpillar and emissions

An emissions engine is one with the DPF. So 2007 and newer.

 

I consider anything with EGR an emissions engine. CAT's Acert was their solution to meeting the emission standards of those years without resorting to EGR.

 

Before EGR was pre-emissions, 2003 was the transition year. EGR was bad enough, DPF was worse. Things started to get better once DEF came out as they began to cut back on EGR.

 

CAT used valve timing with the use of VVA's to control Nox versus EGR on the twin turbos Acerts. Then with the addition of DPF's on the SDP and LEE engines clean gas induction was added because the VVAs alone could not reduce the NOX enough.

 

If I'm not mistaken there are alot of good tunes for those engine... But I have no personal experience with them myself

 

Mine had 1.5M when I sold it, still ran strong and oil samples still looked good. The IVA valves are a known problem with them I would lose maybe one a year. Sometimes it was just the wiring going to it that was bad. The best way to tell if you have one out is your turbo pressure all of the sudden won't go past 30# of boost. It's a safety feature built into it to prevent damage.

 

Pretty sure Acert came out after the MBN (bridge engine). So would have been around the 2003 engine year.