Nissan VQ37VHR (3.7 L) V6 Engine Specs and Review

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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. 

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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:

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  • VQ – Engine Family
  • 37 – 3.7 Liter Displacement
  • V – VVL (Variable Valve Lift)
  • HR – High Response and High Revolution

Nissan VQ37VHR Engine Specs

Nissan VQ37VHR (3.7 L) V6 Engine Specs

Engine Specifications

Engine codeVQ37VHR
LayoutFour stroke, V6
Fuel typeGasoline (petrol)
Production2007-present
Displacement3.7 L, 3,696 cc (225.53 cu in)
Fuel systemDirect Injection
Power adderNone
Power output330 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 output361 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 order1-2-3-4-5-6
Dimensions (L x W x H):
Weight

Cylinder head

Block head alloyAluminium
Valve Arrangement:DOHC, chain drive
Cylinder head height:126.4 mm (4.98 in)
Valves:24 (4 valves per cylinder)
Valve head diameter:INTAKE36.6-36.9 mm (1.441-1.453 in)
EXHAUST30.2-30.5 mm (1.189-1.201 in)
Valve length:INTAKE100.11 mm (3.94 in)
EXHAUST94.67 mm (3.7272 in)
Valve stem diameter:INTAKE5.965-5.980 mm (0.2348-0.2354 in)
EXHAUST5.962-5.970 mm (0.2347-0.2350 in)
Valve spring free length:INTAKE45.66 mm (1.7976 in)
EXHAUST43.85 mm (1.7264 in)
Exhaust camshaft cam height:Bank 145.015-45.205 mm (1.7722-1.7797 in)
Bank 246.735-46.925 mm (1.8400-1.8474 in)
Exhaust camshaft journal diameter:№125.935-25.955 mm (1.0211-1.0218 in)
№2, 3, 4, 523.445-23.465 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

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  • Intake: 103 Nm; 11 kg·m; 76 ft·lb
  • Exhaust: 123 Nm; 13 kg·m; 91 ft·lb

Cylinder block

Cylinder block alloyAluminium
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:Top0.040-0.080 mm (0.0016-0.0031 in)
Second0.030-0.070 mm (0.0012-0.0028 in)
Oil0.055-0.155 mm (0.0022-0.0061 in)
Piston ring end gap:Top0.23-0.33 mm (0.0091-0.0130 in)
Second0.23-0.33 mm (0.0091-0.0130 in)
Oil0.17-0.47 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 valve0.304-0.416 mm (0.012-0.016 in)
Exhaust valve0.308-0.432 mm (0.012-0.017 in)
Compression pressure
Standard17-24 kg/cm2 (242-341 psi) / 200 rpm
Minimun12.5 kg/cm2 (178 psi) / 200 rpm
Compression differential limit between cylinders1.0 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 oil5W-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 plugDENSO: FXE24HR11
Spark plug gap1.1 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.

 ColdHot
Intake0.26-0.34 mm (0.010-0.013 in)0.304-0.416 mm (0.012-0.016 in)
Exhaust0.29-0.37 mm (0.011-0.015 in)0.308-0.432 mm (0.012-0.017 in)

Vehicle Applications

ModelYears Produced
Infiniti G37 Coupe2008–2013
Nissan Skyline V36 370 GT Coupe2008–
Infiniti G37 Sedan2009–
Nissan Skyline V36 370 GT Sedan2009–
Infiniti G37 Convertible2009–2013
Nissan Fuga 370GT2009–
Infiniti FX372009–2013
Infiniti EX372009–2013
Nissan 370Z/Fairlady Z2009–
Nissan 370Z Nismo2009
Infiniti M372011–2013
Infiniti IPL G37 Coupe2011–
Mitsubishi Proudia 370GT2012–
Infiniti IPL G37 Convertible2013
Infiniti Q50 Sedan2014–2015
Infiniti Q60 Coupe2014–
Infiniti Q60 Convertible2014–
Infiniti Q702014–
Infiniti QX502014–
Infiniti QX702014–

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Final Words

This concludes our discussion of the Nissan VQ37VHR (3.7 L) V6 Engine specs and review; however, if you have any questions regarding this article, please submit them in the comment section below. We will do our best to respond to you as soon as possible.

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