Engine specifications (Nissan Maxima A32)

Engine maintenance procedures that do not require removing the engine from the vehicle.

Engine code designation
2.0L models	VQ20DE
3.0L models	VQ30DE(DOHC) and VG30DE(SOHC)
Number and arrangement of cylinders	V6
Number of valves per cylinder	4
Cylinder numbering (from the timing drive side to the transmission) - all engines
Back row (closest to bulkhead)	1-3-5
Front row (closest to the radiator)	2-4-6
Firing order - all engines	1-2-3-4-5-6
Engine displacement, cm³
Models with VG30DE engine	2960
Models with VQ20DE engine	1995
Models with VQ30DE engine	2988
Cylinder diameter and piston stroke, mm
Models with VG30DE engine	87.0 x 83.0
Models with VQ20DE engine	76.0 x 73.3
Models with VQ30DE engine	93.0 x 73.3
Maximum power 1), kW (hp)
Models with VQ20DE engine	103 (140)/6400
Models with VQ30DE engine before 2000.	(193)/6400
Models with VQ30DE engine since 2000.	147 (200)/6400
Maximum torque 1), Nm
Models with VQ20DE engine	179/4000
Models with VQ30DE engine before 2000.	255/3600
Models with VQ30DE engine since 2000.	271/3600
1)In accordance with Directive 89/49/EC;
Compression ratio
Models with VQ20DE engine	9.5
Models with VQ30DE engine	10.0
Cylinder arrangement diagram and direction of rotation of the ignition distributor (sOHC engines)
Cylinder arrangement diagram (dOHC engines)
Camshafts and related components
SOHC engines
Axial clearance of the camshaft, mm	0.03÷0.06
Diameter of rocker arm axles, mm	17.988÷18.000
Diameter of holes in rocker arms, mm	18.007÷18.028
Rocker arm landing clearance on axles, mm	0.007÷0.049
DOHC engines
Axial clearance of the camshaft, mm	0.115÷0.188
Valve clearances, mm
Intake valves	0.26÷0.34
Exhaust valves	0.29÷0.37
Oil pump
SOHC engines
Clearance between the generating surface of the outer gear and the housing, mm	0.11÷0.20
Clearance between internal gear teeth and crescent partition, mm	0.12÷0.23
Clearance between outer gear teeth and crescent partition, mm	0.21÷0.32
Axial clearance of the internal gear seat in the housing, mm	0.05÷0.09
Axial clearance of the outer gear fit in the housing, mm	0.05÷0.011
DOHC engines
Clearance between the generating surface of the outer gear and the housing, mm
Models from 1995 to 1997.	0.114÷0.260
Models since 1998.	0.114÷0.200
Gap between teeth of internal and external gears, mm	0.18
Axial clearance of the internal gear seat in the housing, mm
Models from 1995 to 1997.	0.05÷0.09
Models since 1998.	0.03÷0.07
Axial clearance of the outer gear fit in the housing, mm
Models from 1995 to 1997.	0.03÷0.19
Models since 1998.	0.05÷0.11
Radial clearance of the hub part of the internal gear in the pump body, mm	0.045÷0.091
Tightening forces of threaded connections	Nm
SOHC engines
Camshaft Thrust Plate Bolt	78÷88
Camshaft Timing Gear Bolts	78÷88
Crankshaft pulley bolt	123÷132
Cylinder head bolts
Stage 1	29
Stage 2	59
Stage 3	Loosen all bolts in the reverse order of tightening
Stage 4	29
Stage 5	54÷64
Cylinder head cover bolts	1÷3
Drive Disc Mounting Bolts	83÷93
Exhaust manifold mounting nuts	18÷22
Intake manifold fastener
Bolts for fastening the upper section of the pipeline (pressure chamber)	18÷22
Bolts/nuts for fastening the lower section of the pipeline
Stage 1 (all)	3÷5
Stage 2
Bolts	16÷20
Stage 3
Nuts	24÷27
Oil pan mounting bolts/nuts	7÷8
Oil pan drain plug	29÷39
Oil intake mesh filter mounting bolts	16÷21
Oil intake mesh filter bracket mounting bolts	6.3÷8.3
Oil pump mounting bolts
Long	12÷16
Short	6÷7
Oil pump cover mounting bolts	4÷5
Rocker arm axle mounting bolts	18÷22
Timing Belt Tensioner Nut	43÷58
Timing Belt Cover Fastening Bolts	3÷5
Transmission to Engine Mounting Bracket Bolts	43÷55
Crankshaft rear oil seal retainer mounting bolts	3÷5
Right front powertrain mount through bolts	77÷98
Right rear powertrain mount through bolts	77÷98
Left front powertrain mount through bolt	64÷78
Left front powertrain suspension bracket mounting bolts	41÷52
Left rear powertrain mount through bolt	43÷55
Lower nuts securing the left rear support of the powertrain suspension	43÷55
DOHC engines
Camshaft Sprocket Fastening Bolts	119÷128
Camshaft Bearing Cap Bolts
Stage 1 (First tighten the first bearing cap bolts [13 to 16], then follow the specified order)	1.96
Stage 2	6
Stage 3	9÷11.8
Crankshaft pulley bolt
Stage 1	39÷49
Stage 2	Pull it another 60°
Cylinder head bolts
Stage 1	98
Stage 2	Loosen all bolts in the reverse order of tightening
Stage 3	34÷44
Stage 4	Tighten all fasteners another 90°÷95°
Stage 5	Tighten all fasteners another 90°÷95°
Cylinder head cover fastening bolts
Stage 1	1÷3
Stage 2	5.4÷7.4
Drive Disc Mounting Bolts	83÷93
Exhaust manifold mounting nuts	5÷6.5
Intake manifold
Fastening the upper section of the pipeline	18÷22
Bolts/nuts for fastening the lower section of the pipeline
Stage 1	5÷10
Stage 2	26÷31
Stage 3	Repeat stage 2 several times
Oil pan mounting bolts
Aluminum casting tray	16÷19
Stamped steel pallet	6.4÷7.5
Fastening the pan to the transmission	35÷47
Fastening the tray to the rear cover	6.4÷7.5
Oil pan drain plug	29÷39
Oil pickup tube mounting bolts	16÷19
Oil pump mounting bolts
Models produced in 1995 and 1996.	6.4÷6.6
Models since 1997.	8.4÷10.8
Oil pump cover mounting screws	4÷5
Front timing chain cover mounting bolts
Bolts 6mm	11.8÷13.7
Bolts 8mm	26÷31
Rear timing chain cover mounting bolts	11.8÷13.7
Upper timing chain guide bolts	13÷19
Main Timing Chain Tensioner Mounting Bolts	8.4÷10.8
Main Timing Chain Guide Axle Bolt
Secondary timing chain tensioner mounting bolts	8.4÷10.8
Crankshaft rear oil seal retainer mounting bolts	8.4÷10.8
Front and rear powertrain suspension support bolts	77÷98
Bolts for fastening the brackets of the front and rear powertrain suspension supports to the engine block	43÷55
Lower cross member to frame mounting bolts	77÷98
Bolts for fastening the upper bracket of the right side support of the power unit suspension	43÷55
Bolts/nuts for fastening the right rear support of the powertrain suspension	43÷55
Bolt/nut for fastening the lower bracket of the right side support of the powertrain suspension	78÷90
General and major engine repair procedures
General parameters
Oil pressure, kPa
SOHC engines
At idle speed	Over 59
3200 rpm	363÷451
DOHC engines
1995÷1998 years of issue.
At idle speed	Over 69
3000 rpm	435÷551
1999 issue.
At idle speed	Over 69
2000 rpm	390
Compression pressure in cylinders, kPa
SOHC engines
Nominal value	1.196
Minimum acceptable value	883
Maximum allowable variation between cylinders	98
DOHC engines
Nominal value	1.275
Minimum acceptable value	981
Maximum allowable variation between cylinders	98
Cylinder heads
Maximum permissible flatness, mm	0.1
Head height, mm
SOHC engines	106.8÷107.2
DOHC engines	126.3÷126.5
Valve train components
Clearances of the rocker arms on their axles (sOHC engines), mm	0.007÷0.049
Valve stem diameter, mm
SOHC engines
Intake valves	6.965÷6.980
Exhaust valves	7.965÷7.970
DOHC engines
Intake valves	5.965÷5.980
Exhaust valves	5.965÷5.960
Height of the cylindrical part (belt) of the valve plates, mm
SOHC engines
Intake valves	1.15÷1.45
Exhaust valves	1.35÷1.65
Maximum permissible value	0.5
DOHC engines
Intake valves	0.95÷1.25
Exhaust valves	1.15÷1.45
Maximum permissible value	0.5
Free length of valve springs, mm
SOHC engines
Outer spring	51.2
Inner spring	44.1
DOHC engines	46.93
Maximum permissible value of valve spring end face distortion
SOHC engines
Outer spring	2.2
Inner spring	1.9
DOHC engines	2.0
Valve seat clearances in guide bushings, mm
SOHC engines
Intake valves	0.020÷0.053
Exhaust valves	0.040÷0.073
Maximum permissible value	0.10
DOHC engines
Intake valves	0.020÷0.053
Exhaust valves	0.040÷0.073
Maximum permissible value
Intake valves	0.08
Exhaust valves	0.10
Outer diameter of valve tappets, mm
SOHC engines	15.947÷15.957
DOHC engines	34.960÷34.975
Inner diameter of valve tappet guide bushings, mm
SOHC engines	16.000÷16.013
DOHC engines	35.000÷35.021
Clearance of tappets in guide bushings, mm
SOHC engines	0.043÷0.066
DOHC engines	0.025÷0.061
Camshafts
Inner diameter of camshaft bearings, mm
SOHC engines
Bearing journal A	47.000÷47.025
Bearing journal B	42.500÷42.525
Bearing journal C	48.000÷48.025
DOHC engines
Bearing No.1	26.000÷26.021
Bearings No.2, 3 and 4	23.500÷23.521
Outer diameter of camshaft bearing journals, mm
SOHC engines
Neck A	46.920÷46.940
Neck B	42.420÷42.440
Neck C	47.920÷47.940
DOHC engines
1995÷1998 years of issue.
Neck #1	25.935÷25.955
Necks No.2, 3 and 4	23.435÷23.455
1999 issue.
Neck #1	25.935÷25.955
Necks No.2, 3 and 4	23.445÷23.465
Clearances in camshaft bearings, mm
SOHC engines
Nominal value	0.045÷0.090
DOHC engines
1995-1998 issue.
Nominal value	0.045÷0.086
Maximum permissible value	0.15
1999 issue.
Nominal value
Neck #1	0.045÷0.086
Necks No.2, 3 and 4	0.035÷0.076
Maximum permissible value	0.15
Axial clearance of camshafts, mm
SOHC engines	0.03÷0.06
DOHC engines	0.115÷0.118
Lateral runout of camshafts, mm
SOHC engines
Nominal value	0.04
Maximum permissible value	0.10
DOHC engines
Nominal value	0.02
Maximum permissible value	0.05
Height of intake and exhaust camshaft cams, mm
SOHC engines
Nominal value	39.537÷39.727
Maximum permissible value (loss of working projection)	0.15
DOHC engines
Nominal value	43.940÷44.130
Maximum permissible value (loss of working projection)	0.20
Engine block
Maximum permissible flatness (all engines), mm	0.10
Cylinder diameter, mm
SOHC engines
Nominal value	87.000÷87.030
Maximum permissible wear	0.20
DOHC engines
Nominal value	93.000÷93.030
Maximum permissible wear	0.20
Maximum permissible ovality and taper of cylinders (all engines), mm	0.015
Inner diameter of main bearings, mm
SOHC engines	66.645÷66.672
DOHC engines	63.993÷64.017
Pistons and piston rings
Piston skirt diameter, mm
SOHC engines	86.965÷86.995
DOHC engines	92.980÷93.010
Piston seating clearances in cylinders, mm
SOHC engines	0.015÷0.035
DOHC engines	0.01÷0.03
Lateral clearance of piston rings, mm
SOHC engines
Upper compression ring
Nominal value	0.040÷0.073
Maximum permissible value	0.10
Second compression ring
Nominal value	0.030÷0.063
Maximum permissible value	0.10
Oil scraper ring
Nominal value	0.015÷0.019
Maximum permissible value	0.10
DOHC engines
Upper compression ring
Nominal value	0.04÷0.08
Maximum permissible value	0.10
Second compression ring
Nominal value	0.03÷0.07
Maximum permissible value	0.10
Oil scraper ring
Nominal value	0.015÷0.019
Maximum permissible value	0.10
Clearances in piston ring locks
SOHC engines
Upper compression ring
Nominal value	0.21÷0.44
Maximum permissible value	0.10
Second compression ring
Nominal value	0.18÷0.44
Maximum permissible value	0.10
Oil scraper ring (working section)
Nominal value	0.20÷0.76
Maximum permissible value	0.10
DOHC engines
1995 and 1996 issues.
Upper compression ring
Nominal value	0.22÷0.41
Maximum permissible value	0.55
Second compression ring
Nominal value	0.50÷0.74
Maximum permissible value	0.85
Oil scraper ring (working section)
Nominal value	0.20÷0.69
Maximum permissible value	0.95
since 1997.
Upper compression ring
Nominal value	0.22÷0.32
Maximum permissible value	0.55
Second compression ring
Nominal value	0.32÷0.47
Maximum permissible value	0.85
Oil scraper ring (working section)
Nominal value	0.20÷0.60
Maximum permissible value	0.95
Crankshaft
Main journal diameter, mm
SOHC engines	62.951÷62.975
DOHC engines	59.951÷59.975
Diameter of connecting rod journals, mm
SOHC engines	49.955÷49.974
DOHC engines	44.956÷44.974
Maximum permissible ovality and taper of necks, mm
SOHC engines	0.005
DOHC engines	0.002
Axial clearance, mm
SOHC engines
Nominal value	0.05÷0.17
Maximum permissible value	0.30
DOHC engines
Nominal value	0.10÷0.25
Maximum permissible value	0.30
Clearances in main bearings, mm
SOHC engines
Nominal value	0.028÷0.055
Maximum permissible value	0.09
DOHC engines
1995 and 1996 issues.
Nominal value	0.035÷0.053
Maximum permissible value	0.065
since 1997.
Nominal value	0.012÷0.030
Maximum permissible value	0.065
Clearances in connecting rod bearings, mm
SOHC engines
Nominal value	0.014÷0.054
Maximum permissible value	0.09
DOHC engines
1995 and 1996 issues.
Nominal value	0.034÷0.059
Maximum permissible value	0.07
since 1997.
Nominal value	0.020÷0.045
Maximum permissible value	0.07
The amount of axial clearance of the connecting rods on the crankshaft (all engines), mm
Nominal value	0.20÷0.35
Maximum permissible value	0.40
Tightening forces of threaded connections	Nm
Crankshaft rear oil seal retainer mounting bolts
SOHC engines	6.3÷8.3
DOHC engines	8.4÷10.8
Connecting rod nuts
SOHC engines
Stage 1	14÷16
Stage 2	59÷65
DOHC engines
Stage 1	19÷21
Stage 2	Extend another 90°÷95°
Main bearing cap bolts
SOHC engines	90÷100
DOHC engines
Stage 1	32÷38
Stage 2	Extend another 90°÷95°

(Data copied from web resource: nissanbook.ru)