2006 peterbilt 379

Is this a CAT C-15 acert? These engines will huff a considerable amount of blow by while idling.

I would just make sure you run the engine fan if your pulling steep grades and is hot out to keep coolant and oil cool.

 

If the hot oil and blow by are NEW symptoms (which it sounds like they are) I would have it checked out. Like stated above, Cats tend to have some blow by, but if the hot oil is new, get it checked out.

 

The grill cover is probably why your getting higher temps. I have a 2006 pete with mxs acert and never use a winter grill front. I believe CAT recommends not even using one. I sometimes truck when its 25 - 30 below F without a winter front and never had issues keeping the engine warm. As long as the thermostats are good and working properly you shouldn't need one. Just my .02.

When I first got my truck I did put on a grill front in the winter but noticed immediately the coolant, oil was always hotter and the exhaust temps increased cause its restricting flow across the radatior and CAC. I took it off and never used it again.

 

Ok, yeah a twin turbo is a acert. I think you should be fine just watch your gauges. As long as it isn't blowing out white steam and smells like coolant. If the engine oil is ok and sounds good I would run it.

Before I learned to drive the acert I would not turn the fan on manual and remember the eng oil would get to 240 F on hard pulls before the engine fan automatically come on. I since then never let it do that and I watch gauges real close and turn on fan before it gets that high.

 

Cat motors like the cold air, take your time rolling hills. All trucks have different sweet spots. Take some time find your trucks spot. Find that gear, the rpm range and temp. Does your ride have a Pyro Guage?

The ACERT blowby hose, will puff don't sweat it. Your motor is strong, if ya want have it tuned. Joplin peterbilt has a guy who does this in his sleep. His name is Jay.

If you have questions no matter how. Small. Ask