pentastar engines

Chrysler Pentastar Engines - Specifications

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 HorsepowerTorque (lb-ft)0-60 (est)EPA MPG
Dodge Challenger305268 18/26
Dodge Charger Pursuit291 @ 6,400260 @ 4,4008.65 (5-spd) 
Chrysler 300 and Dodge Charger292 @ 6,400260 @ 4,8006.6 (8-spd)19/26 (five speed)
19/31 (eight speed)
Minivans, Avenger, 200283 @ 6,400260 @ 4,800 17/25
Avenger/200283 @ 6,400260 @ 4,8007.119/29
Jeep Grand Cherokee290 @ 6,400260 @ 4,800 16/24 (five speed)
? / ? (eight speed)
Dodge Durango (2014)    
Ram 1500305 @ 6,400269 @ 4,175 up to 18/25
3.2 in Jeep Cherokee271 @ 6,500239 @ 4,400 22/29 (4x4)

Specifications for the Mopar Pentastar engines used in Chrysler, Dodge, Jeep, and Ram cars and trucks (there may be minor differences for some models):

Spec3.6 liter V63.2 liter V6
MaterialLiquid cooled 60° V6 with deep-skirt aluminum block and heads; metric standard
ValvesChain driven DOHC with 24 valves. Roller finger followers and hydraulic lash adjusters.
Dual independent cam-torque actuated phasers.
Displacement, bore x stroke220 cid, 3.78 x 3.27 (96 x 83 mm)198 cid, 3.58 x 3.27 (91 x 83 mm)
Fuel injectionReturnless, sequential. Same
Compression10.2:110.7:1
Fluids6 quarts 5W20 oil; 14 quarts antifreeze; regular gas6 quarts oil, 9.7 quarters antifreeze, regular gas
Redline6,400 rpm6,500 rpm
Emission controlsDual three-way catalytic convertersTwo mini-oxidation 3-way catalytic converters
Firing order1-2-3-4-5-6; lead cylinder is #1 in the right bank 
Cylinder bore diameterGrade 1, 95.995 mm ± 0.005 mm (3.7793 ± 0.0002 in);
Grade 2, 96.005 mm ± 0.005 mm (3.7797 inches 0.0002)
?
BoreMax out-of-round: 0.009 mm (0.00035 inches). Cylindricity: 0.014 mm?
Crank bore taperMax, measured over length of bulkhead, 0.006 mm?
PistonsCast aluminum alloy; weight, 354-364 grams?
Piston pin offset0.8 mm?
Piston pinsFull floating pins, 21.9985 ± 0.0015 mm diameter
Clearance in piston, 0.002 - 0.011 mm; in rod, 0.011 - 0.024 mm
?
Piston rings#1 and #2 (top and center) are compression, 0.25-0.40 and 0.30 - 0.45 gaps respectively. #3 is oil control (steel rings), 0.15 - 0.66 gap?
Intake valve timingOpens at 2° ATDC, closes at 82° (ABDC) or 262° (ATDC); 260° duration, 128° centerline (crank degrees, using a 0.1524 mm valve lift threshold)?
Exhaust valve timingOpens 59° (BBDC) or 239° (BTDC), closes 12° ATDC, duration 251°, overlap 10° (crank degrees, using a 0.1524 mm valve lift threshold)?
Oil pressure Warm: 600-1,200 rpm: 34.7 kPa min; 1,201-3,500 206.8 min; 3,501 - 6,400, 427.0 min. Cold: 958 (139 psi)?

Running on regular gas, the Pentastar engine meets California LEV II+ evaporative emission requirements, Tier 2, meets Federal Bin 4+ emission requirements, and Clean Fuel Fleet Certification (CCF-LEV) in all other states.

The block weighs just 77 lb (not much more than the four-cylinder 2.4). The crankshaft weighs 43 lb; the cylinder heads, 27 (bare). With valves, the heads weigh around 31 lb.

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