Nissan VQ37VHR (3.7 L) V6 Engine Specs and Review
Nissan VQ37VHR Engine Specs
The Nissan VQ37VHR is a 3.7 l (225.53 cu.in.) 3,696 cc, V6 4-stroke natural aspirated gasoline engine from Nissan VQ-family. The engine has been made in Nissan’s Iwaki factory since 2007. The Nissan VQ37VHR engine was honoured by Ward’s 10 Best Engines list in 2008.
The Nissan VQ37VHR engine is fitted with CVTC (eVTC), VVEL system and NDIS (Nissan Direct Ignition System) with individual coils on each spark plug.
Nissan VQ37VHR engine delivers from 330 PS (242 kW, 325 HP) at 7000 rpm on the European version of Infiniti FX37 and EX37 up to 355 PS (261 kW, 350 HP) at 7600 rpm on Nissan Fairlady Z (Nismo version). The Nissan VQ37VHR engine’s maximum torque is 374 Nm (38.13 kg·m, 275.8 lb·ft) at 5200 rpm.
The Nissan VQ37VHR engine compression ratio rating is 11:1. Cylinder bore and piston stroke are 95.5 mm (3.76 in) and 86.0 mm (3.38 in), respectively.
The Nissan VQ37VHR engine features a lightweight aluminum block with a fully balanced four-bearings crankshaft, four valves per Cylinder, and two aluminum heads with two camshafts (DOHC).
The breakdown of the Nissan VQ37VHR engine code is as follows:
- VQ – Engine Family
- 37 – 3.7 Liter Displacement
- V – VVL (Variable Valve Lift)
- HR – High Response and High Revolution
Nissan VQ37VHR (3.7 L) V6 Engine Specs
Engine Specifications
| Engine code | VQ37VHR |
| Layout | Four stroke, V6 |
| Fuel type | Gasoline (petrol) |
| Production | 2007-present |
| Displacement | 3.7 L, 3,696 cc (225.53 cu in) |
| Fuel system | Direct Injection |
| Power adder | None |
| Power output | 330 PS (243 kW, 325 HP) at 7,000 rpm 333 PS (245 kW, 328 HP) at 7,000 rpm 336 PS (247 kW, 331 HP) at 7,000 rpm 355 PS (261 kW, 350 HP) at 7,400 rpm |
| Torque output | 361 Nm (36.8 kg·m, 266.3 lb·ft) at 5,200 rpm 363 Nm (37.0 kg·m, 267.7 lb·ft) at 5,200 rpm 365 Nm (37.2 kg·m, 269.2 lb·ft) at 5,200 rpm 374 Nm (38.1 kg·m, 275.3 lb·ft) at 5,200 rpm |
| Firing order | 1-2-3-4-5-6 |
| Dimensions (L x W x H): | – |
| Weight | – |
Cylinder head
| Block head alloy | Aluminium | |
| Valve Arrangement: | DOHC, chain drive | |
| Cylinder head height: | 126.4 mm (4.98 in) | |
| Valves: | 24 (4 valves per cylinder) | |
| Valve head diameter: | INTAKE | 36.6-36.9 mm (1.441-1.453 in) |
| EXHAUST | 30.2-30.5 mm (1.189-1.201 in) | |
| Valve length: | INTAKE | 100.11 mm (3.94 in) |
| EXHAUST | 94.67 mm (3.7272 in) | |
| Valve stem diameter: | INTAKE | 5.965-5.980 mm (0.2348-0.2354 in) |
| EXHAUST | 5.962-5.970 mm (0.2347-0.2350 in) | |
| Valve spring free length: | INTAKE | 45.66 mm (1.7976 in) |
| EXHAUST | 43.85 mm (1.7264 in) | |
| Exhaust camshaft cam height: | Bank 1 | 45.015-45.205 mm (1.7722-1.7797 in) |
| Bank 2 | 46.735-46.925 mm (1.8400-1.8474 in) | |
| Exhaust camshaft journal diameter: | №1 | 25.935-25.955 mm (1.0211-1.0218 in) |
| №2, 3, 4, 5 | 23.445-23.465 mm (0.9230-0.9238 in) | |
Head tightening procedure and torque specs:
- Step 1: 105 Nm; 11.0 kg·m; 77 ft·lb
- Step 2: Loosen all bolts completely
- Step 3: 40 kg·m; 4.1 kg·m; 30 ft·lb
- Step 4: Turn all bolts 95°
- Step 5: Turn all bolts another 95°
Camshaft sprocket bolts
- Intake: 103 Nm; 11 kg·m; 76 ft·lb
- Exhaust: 123 Nm; 13 kg·m; 91 ft·lb
Cylinder block
| Cylinder block alloy | Aluminium | |
| Compression ratio: | 11:1 | |
| Cylinder bore: | 95.5 mm (3.760 in) | |
| Piston stroke: | 86.0 mm (3.386 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 4 | |
| Cylinder inner diameter (standard): | 95.500-95.510 mm (3.7598-3.7602 in) | |
| Piston skirt diameter (standard): | 95.480-95.490 mm (3.7590-3.7594 in) | |
| Piston pin outer diameter: | 21.989-21.995 mm (0.8657-0.8659 in) | |
| Piston ring side clearance: | Top | 0.040-0.080 mm (0.0016-0.0031 in) |
| Second | 0.030-0.070 mm (0.0012-0.0028 in) | |
| Oil | 0.055-0.155 mm (0.0022-0.0061 in) | |
| Piston ring end gap: | Top | 0.23-0.33 mm (0.0091-0.0130 in) |
| Second | 0.23-0.33 mm (0.0091-0.0130 in) | |
| Oil | 0.17-0.47 mm (0.0067-0.0185 in) | |
| Connecting rod bushing inner diameter: | 22.000-22.006 mm (0.8661-0.8664 in) | |
| Connecting rod big end diameter: | 57.000 mm (2.2441 in) | |
| Connecting rod center distance: | 149.45-149.55 mm (5.88 – 5.89 in) | |
| Crankshaft main journal diameter: | 64.975 mm (2.5581 in) | |
| Crankpin diameter: | 53.974 mm (2.1250 in) | |
| Crankshaft center distance: | 42.96-43.04 mm (1.6913-1.6945 in) | |
Maintenance Data
| Valve clearance (HOT) | |
| Intake valve | 0.304-0.416 mm (0.012-0.016 in) |
| Exhaust valve | 0.308-0.432 mm (0.012-0.017 in) |
| Compression pressure | |
| Standard | 17-24 kg/cm2 (242-341 psi) / 200 rpm |
| Minimun | 12.5 kg/cm2 (178 psi) / 200 rpm |
| Compression differential limit between cylinders | 1.0 kg/cm2 (15 psi) / 200 rpm |
| Oil system | |
| Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil | 5W-30 |
| Oil type API | – |
| Engine oil capacity (Refill capacity) | With filter change 4.9 l (5-1/8 US. qt., 4-3/8 Imp. qt.) Without filter change 4.6 l (4-7/8 Us. qt., 4 Imp. qt.) |
| Oil change interval, km (miles) | 5,000-10,000 (3,000-6,000) |
| Oil Pressure, kPa (kg/cm 2, psi) | Idle speed: More than 98 (1.0, 14) 2,000 rpm: More than 294 (3.0, 43) |
| Ignition system | |
| Spark plug | DENSO: FXE24HR11 |
| Spark plug gap | 1.1 mm (0.043 in) |
Valve clearance adjustment data
Calculate the thickness of new adjusting valve lifter so valve clearance comes within specified values.
R = Thickness of removed valve lifter
N = Thickness of new valve lifter
M = Measured valve clearance
Intake:
N = R + [M – 0.30 mm (0.012 in)]Exhaust:
N = R + [M – 0.34 mm (0.013 in)]
Valve lifters are available in 27 sizes to range from 7.88 mm (0.3102 in) to 8.40 mm (0.3307 in), in steps of 0.02 mm (0.0008 in).
Example (exhaust valve):
R = 7.90 mm
M = 0.52 mm
N = 7.90 + (0.52 – 0.34) = 8.08 mm, so we need a valve lifter with identification mark 808.
| Cold | Hot | |
| Intake | 0.26-0.34 mm (0.010-0.013 in) | 0.304-0.416 mm (0.012-0.016 in) |
| Exhaust | 0.29-0.37 mm (0.011-0.015 in) | 0.308-0.432 mm (0.012-0.017 in) |
Vehicle Applications
| Model | Years Produced |
| Infiniti G37 Coupe | 2008–2013 |
| Nissan Skyline V36 370 GT Coupe | 2008– |
| Infiniti G37 Sedan | 2009– |
| Nissan Skyline V36 370 GT Sedan | 2009– |
| Infiniti G37 Convertible | 2009–2013 |
| Nissan Fuga 370GT | 2009– |
| Infiniti FX37 | 2009–2013 |
| Infiniti EX37 | 2009–2013 |
| Nissan 370Z/Fairlady Z | 2009– |
| Nissan 370Z Nismo | 2009 |
| Infiniti M37 | 2011–2013 |
| Infiniti IPL G37 Coupe | 2011– |
| Mitsubishi Proudia 370GT | 2012– |
| Infiniti IPL G37 Convertible | 2013 |
| Infiniti Q50 Sedan | 2014–2015 |
| Infiniti Q60 Coupe | 2014– |
| Infiniti Q60 Convertible | 2014– |
| Infiniti Q70 | 2014– |
| Infiniti QX50 | 2014– |
| Infiniti QX70 | 2014– |
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Final Words
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