Editing Chrysler PowerTech engine (section)

==3.7 EKG==<!-- This section is linked from [[V6 engine]] -->
[[File:Chrysler PowerTech 3.7.jpg|right|thumb|250px|Chrysler PowerTech 3.7 L V6 in a 2005 [[Jeep Grand Cherokee]]]]

The '''EKG'''  is a 3.7&nbsp;L V6 version built in [[Detroit|Detroit, Michigan]]. It displaces {{cvt|3701|cc|L cuin|1|disp=flip}}.<ref name=Specs>{{cite web |url=http://www.jeep.com/bridge/vehsuite.html?app=vehiclespecs&family=liberty&model=Technical&zipcode=10101&year=2008 |title=Jeep - Specs & Upgrades |accessdate=2008-01-14 |date= |publisher=Chrysler LLC|quote=Engine - Displacement - Cubic Inches...226.0. Engine - Displacement - Cubic Centimeters...3697; bore (in.)...3.66; stroke (in.)...3.57}}</ref> The bore and stroke measure {{cvt|3.66x3.57|in|mm|1}}. It is a 90° [[V engine]] like the V8, with [[SOHC]] 2-valve heads. It utilizes a counter-rotating balance shaft mounted between the cylinder banks to deal with vibration problems of the 90-degree V6 design, as well as use a 30-degree split pin [[crankshaft]] to fire the cylinders every 120 degrees. Output is {{cvt|210|hp|kW|0}} at 5200&nbsp;rpm with {{cvt|235|lbft|Nm|0}} of torque at 4000&nbsp;rpm.<ref name=Specs/> It has a cast iron engine block and aluminum [[SOHC]] cylinder heads. It uses [[Sequential fuel injection]], has roller followers, and features fracture-split forged powder metal [[connecting rod]]s and an assembled reinforced plastic [[intake manifold]].

The Chrysler 3.7 PowerTech engine used in the 2007 - 2012 [[Jeep Liberty (KK)|Jeep Liberty KK]] used a wasted spark ignition system that uses one ignition coil to fire two cylinders.

{| class="mw-collapsible mw-collapsed wikitable"
! colspan="2" |3.7 Engine Specifications
|-
!Description
!Specification
|-
|[[Firing order|Firing Order]]
|1-6-5-4-3-2
|-
|Lead Cylinder
|#1 Left Bank
|-
|[[Compression ratio|Compression Ratio]]
|9.6:1
|-
|[[Oil pressure|Oil Pressure]] at Idle
|4 psi (25 kPa)
|-
|Oil Pressure @ 3000 RPM
|25-110 psi (170-758 kPa)
|-
|Max Variation Between Cylinders
|25%
|-
|[[Compression ratio|Compression]]
|170-225 PSI (1172-1551 kPa)
|-
|[[Cylinder bore|Cylinder Bore]] Diameter
|3.6619 in. (93.013 mm)
|-
|Cylinder Out of Round (max)
|0.003 in. (0.051 mm)
|-
|Cylinder Taper (max)
|0.002 in. (0.051 mm)
|-
![[Piston|Pistons]]
|
|-
|Piston Diameter
|3.6605 in. (92.975 mm)
|-
|Piston Weight
|12.87 oz. (365.0 grams)
|-
|Ring Groove Diameter
|'''No. 1:''' 3.282-3.273 in. (85.37-83.13 mm)
'''No. 2:''' 3.261-3.310 in. (82.833-83.033 mm)

'''No. 3:''' 3.302-3.310 in. (83.88-84.08 mm)
|-
|Piston Pin Diameter
|0.9455-0.9456 in. (24.017-24.020 mm)
|-
|Piston Pin Clearance
|0.0002-0.0005 in. (0.006-0.015 mm)
|-
![[Piston Ring Gap]]
|
|-
|Top Compression Ring
|0.0076-0.0142 in. (0.20-0.36 mm)
|-
|Second Compression Ring
|0.0146-0.0249 in. (0.37-0.63 mm)
|-
|Oil Control Ring (Steel Rails)
|0.0099-0.30 in. (0.25-0.76 mm)
|-
![[Piston ring|Piston Ring]] Side Clearance
|
|-
|Top Compression Ring
|0.0020-0.0037 in. (0.051-0.094 mm)
|-
|Second Compression Ring
|0.0016-0.0031 in. (0.040-0.080 mm)
|-
|Oil Control Ring
|0.0007-0.0091 in. (0.019-0.229 mm)
|-
!Piston Ring Width
|
|-
|Top Compression Ring
|0.057-0.058 in. (1.472-1.490 mm)
|-
|Second Compression Ring
|0.057-0.058 in. (1.472-1.490 mm)
|-
|Oil Control Ring
|0.017-0.018 in. (0.445-0.470 mm)
|-
![[Connecting rod|Connecting Rods]]
|
|-
|Bearing Clearance
|0.0002-0.0017 in. (0.006-0.044 mm)
|-
|Side Clearance
|0.004-0.0138 in. (0.10-0.35 mm)
|-
|Piston Pin Clearance
|0.0006-0.0011 in. (0.015-0.028 mm)
|-
|Bearing Bore Out of Round (max)
|0.0002 in. (0.004mm)
|-
|Total Weight (No Bearing)
|21.588 Ounces (612 Grams)
|-
![[Crankshaft]]
|
|-
|[[Main bearing|Main Bearing]] Journal Diameter
|2.4996-2.5005 in. (63.488-63.512 mm)
|-
|Main Bearing Clearance
|0.00008-0.0018 in. (0.002-0.048 mm)
|-
|Main Bearing Out of Round (max)
|0.0002 in. (0.282 mm)
|-
|Main Bearing Taper (max)
|0.0004 in. (0.006 mm)
|-
|[[Connecting rod|Connecting Rod]] Journal Diameter
|2.2798-2.2792 in. (57.908-57.892 mm)
|-
|Connecting Rod Bearing Clearance
|0.0002-0.0011 in. (0.006-0.044 mm)
|-
|Connecting Rod Bearing Out of Round (max)
|0.0002 in. (0.005 mm)
|-
|Connecting Rod Bearing Taper (max)
|0.0002 in. (0.006 mm)
|-
|End Play
|0.0021-0.0112 in. (0.052-0.282 mm)
|-
![[Camshaft]]
|
|-
|Bore Diameter
|1.0245-1.0252 in. (26.02-28.04 mm)
|-
|Bearing Journal Diameter
|1.0227-1.0235 in. (25.975-25.995 mm)
|-
|Bearing Clearance
|0.001-0.0026 in. (0.025-0.065 mm)
|-
|End Play
|0.003-0.0079 in. (0.075-0.200 mm)
|-
![[Valve timing|Valve Timing]]
|
|-
|Valve Overlap
|25.7°
|-
|'''Intake'''
|
|-
|Opens (Before Top Dead Center)
|5.6°
|-
|Closes (After Top Dead Center)
|240.1°
|-
|Duration
|245.7°
|-
|'''Exhaust'''
|
|-
|Opens (Before Top Dead Center)
|241.5°
|-
|Closes (After Top Dead Center)
|20.1°
|-
|Duration
|261.6°
|-
![[Cylinder head Valves|Valves]]
|
|-
|Face Angle
|45°-45.5°
|-
|'''Head Diameter'''
|
|-
|Intake 
|1.9103-1.9205 in. (48.52-48.78 mm)
|-
|Exhaust
|1.4516-1.4618 in. (36.87-37.13 mm)
|-
|'''Length (Overall)'''
|
|-
|Intake
|4.4666-4.4965 in. (113.45-114.21 mm)
|-
|Exhaust
|4.5244-4.5543 in. (114.92-115.68 mm)
|-
|'''Stem Diameter'''
|
|-
|Intake
|0.2729-0.2739 in. (6.931-6.957 mm)
|-
|Exhaust
|0.2717-0.2728 in. (6.902-6.928 mm)
|-
|'''Stem-to-Guide Clearance'''
|
|-
|Intake
|0.0008-0.0028 in. (0.018-0.069 mm)
|-
|Exhaust
|0.0019-0.0039 in. (0.047-0.098 mm)
|-
|'''Valve Lift (Zero Lash)'''
|
|-
|Intake
|0.472 in. (12.00 mm)
|-
|Exhaust
|0.472 in. (12.00 mm)
|-
![[Valve Springs]]
|
|-
|'''Free Length'''
|
|-
|Intake
|1.896 in. (48.18 mm)
|-
|Exhaust w/ Damper
|1.973 in. (49.2 mm)
|-
|'''Spring Force (Closed Valve)'''
|
|-
|Intake
|74.53-82.72 lbs. @ 1.5795 in (332.0-358.0 N @ 40.12mm)
|-
|Exhaust w/o Damper
|80.031-88.57 lbs. @ 1.54 in. (356-394 N @ 39.12 mm)
|-
|'''Spring Force (Open Valve)'''
|
|-
|Intake
|213.2-233.8 lbs. @ 1.107 in. (948.0-1038.0 N @ 28.12 mm)
|-
|Exhaust w/o Damper
|196.5-214.9 lbs. @ 1.057 in. (874-856 @ 27.12 mm)
|-
|'''Number of Coils'''
|
|-
|Intake
|7.30
|-
|Exhaust
|7.15
|-
|'''Wire Diameter'''
|
|-
|Intake
|0.1878 x 0.1496 in. (4.77 x 3.80 mm)
|-
|Exhaust
|0.1843 x 0.1464 in (4.66 x 3.72 mm)
|-
|'''Installed Height (Spring Seat to Bottom of Retainer)'''
|
|-
|Intake 
|1.579 in. (40.12 mm)
|-
|Exhaust w/ Damper
|1.579 in. (40.12 mm)
|-
![[Cylinder head|Cylinder Head]]
|
|-
|Gasket Thickness
|0.0276 in. (0.7mm)
|-
|Valve Seat Angle
|44.5°-45.0°
|-
|Valve Seat Runout (max)
|0.002 in. (0.051 mm)
|-
|Valve Seat Width
|
{| class="wikitable"
|+
!Intake 
!Exhaust
|-
|0.0698-0.0928 in. (1.75-2.36 mm)
|0.0673-0.091 in. (1.71-2.32 mm)
|}
|-
|Guide Bore Diameter
|0.2747-0.2756 in (6.975-7.00 mm)
|-
|Cylinder Head Warpage (Flatness)
|0.002 in. (0.0508 mm)
|}


'''Applications'''
*2002–2010 [[Dodge Ram|Dodge Ram 1500]]
*2002      [[Dodge M80]]
*2004–2011 [[Dodge Dakota]]
*2004–2009 [[Dodge Durango]]
*2007–2011 [[Dodge Nitro]]
*2002–2012 [[Jeep Liberty]]
*2005–2010 [[Jeep Grand Cherokee]]
*2006–2010 [[Jeep Commander (XK)|Jeep Commander]]
*2006–2010 [[Mitsubishi Raider]]
*2011–2012 [[Dodge Ram|Ram 1500]]