(Updated February 15, 2017) The “PSU” — Penta Star Upgrade — on the 2016 Jeep Grand Cherokee and Dodge Durango is not the “PUG” Pentastar upgrade we have been looking for.
We still expect new heads and direct injection; we have gotten better cam phasing, essential for hybrid use. When the new “PUG” engine arrives, the old “legacy” V6 may continue for some cars; changes seem to be getting phased in.
Gas mileage is said to be good, partly due to the use of high-pressure, die-cast blocks, which save on labor and allow for thinner walls and less use of aluminum.
These blocks are 20 pounds lighter than General Motors’ V6 blocks, saving around per engine on aluminum alone; an independent firm estimated that these engines are at least 0 cheaper to build than GM’s current V6 line.
A patent (applied for back in 2011 by Chrysler’s Richard H. Falkowski) can cut Chrysler’s costs and reduce the size of their engines, helping the company to either fit larger engines into their cars, or to lower their hoods. Developed to avoid European engine-size-based taxes, it has just under 3 liters of displacement (e.g.
It applies to in-line and V-engines alike, which means it could be used for the upcoming Hurricane turbocharged four-cylinder; but the drawings and a specific size example are taken from a V6 engine, presumably the PUG (Pentastar Upgrade). 2.997 liters / 2997 cc), and a different block — stronger, with substantial passage differences, and even closer tolerances than the 3.6 and 3.2.
Mopar Norm wrote that the 3.2, used only on the Jeep Cherokee, was created by changing the thickness of the cylinder liner; this means there can be a single block, but the 3.2 can still have, effectively, a smaller bore.
The piston, rings, valves, and heads will change, and the 3.2 will have smaller journals, increasing gas mileage by reducing rolling resistance. It comes in at 198 cid — the same displacement as the mid-range slant six — and has a compression ratio of 10.7:1.
This report came on November 3, 2008: Even the most powerful Phoenix, displacing 3.6 liters and producing (in preliminary tests) over 280 horsepower, is quieter than Toyota’s 3.3 liter V6 - and far quieter than the Toyota 3.5 liter V6.
started posting news about the Pentastar V6 in 2006, four years before its official release.
The Phoenix engines were first discussed by Allpar member "superduckie" way back in March 2006.
The new lineup of Mercedes V6 engines are most likely close relatives of the Chrysler V6, but Mercedes is unlikely to ever state this on the record.
The following table was first provided in July 2006 with information from oh20, in a form not dissimilar from its current state.