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Pentastar Upgrade (PUG) – Updated

by David Zatz on

Chrysler has three engines rumored to be coming within the next year: the turbo four, the Pentastar V6, and the “Eagle” 5.7 liter Hemi (some sources say the 6.4 / 392 Hemi will also be updated.)

Allpar sources are now placing the “PUG,” or Pentastar V6, upgrade in the next six months, along with the Hemi upgrade. There is some ambiguity around whether that signals the start of tooling, or of production, with the former being more likely.

The updated V6 engines might use a head assembly that integrates valve controls in the head, rather than having them sit outside, to reduce cost and size, making a lower hood possible; Chrysler has  patented this (see image).

Update. A trusted source wrote in to say that the PUG looks much different, and reminded us that it will have a stop-start system on more vehicles (as we noted earlier) — though whether it will have Chrysler’s new belt-starter-generator (BSG) system remains unknown to us. The engine is apparently coming sooner rather than later provided nothing comes up in testing.

Some have speculated that the PUG will wait until the start of calendar-year 2017 for production, because rumor has it using direct injection, and clean-sulfur fuel (due at the start of 2017) would help avoid problems that other automakers have had. This is a fairly late start, with General Motors and others having switched to direct injection some time back.

Chrysler may choose to launch the engine earlier, since few customers would drive with our current fuel long enough to hurt their engines, and refiners will most likely switch over early.

Unofficial sources hinted to Allpar that we should not expect major power gains, but would get better drivability through a flatter torque curve, and higher fuel efficiency.

The Pentastar engines are said to have a much heftier oil pump (possibly for MultiAir), revised heads, direct injection, and better cam phasing, possibly affecting exhaust as well as intake, or altering the valve lift. Chrysler has filed a patent for variable width intakes, which would make their engines more efficient at low speeds by speeding airflow.

The new V6 could debut on the 2017 Ram or minivan, or might simply be launched on each vehicle in turn based on how long it takes to adapt the “dressing.” The company could introduce it across all lines in the same model year — or not.

Still rumored to be on the way is a supercharged 3-liter Pentastar V6 and possibly a small V8 based on the same engine family.  Either one would provide a more fuel-efficient and smaller option between the current V6 and the 5.7 Hemi.

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