Technical data and specifications — Engine MR20DE (Nissan X-Trail T31)

General information

Engine		MR20DE
Cylinder arrangement		4 in a row
Cylinder capacity, cm³		1,997
Cylinder diameter and piston stroke, mm		84,0 x 90,1
Valve arrangement		Double overhead camshafts (DOHC)
Cylinder firing order		1-3 4 2
Number of piston rings	compression	2
	oil scraper	1
Compression ratio		10,2
Compression pressure: kPa (kg/cm²)/250 rpm	Standard	1390(14,2)
	Minimum	1140 (11,6)
	Maximum cylinder spread	100 (1,0)

Valve timing (): Valve timing mechanism in the "ON" position

: Intake valves

: Exhaust valves

Unit of measurement, degrees.

a	b	with	d	e	f
220	232	13 (27) after VMT	65 (25) after VMT	7	33

Drive belt

Drive belt tension

Adjusted automatically by automatic tensioner

Spark plugs

Manufacturer	NGK
Standard candle	PLZKAR6A 11
Spark gap	1 1 mm

Exhaust manifold

Parameter		Limit
Surface warping	Individual holes	0.3 mm
	Collector as a whole	0.7 mm

Camshafts

Parameter		Standard	Limit
Oil clearance in the camshaft journals	№1	0.045-0.086 mm	0.15 mm
	№2,3,3 5	0.030-0.071 mm
Inner diameter of camshaft bracket	№1	28,000-28,021 mm
	№2,3,3 5	25,000-25,021 mm
Outside diameter of camshaft journal	№1	27.935-27.955 mm
	№2,3,3 5	24,950-24,970 mm
Camshaft axial play		0.075-0.153 mm	0.24 mm
Height of cam "A"	Inlet	45.265-45.455 mm	45,065 mm
	Release	43.775-43.965 mm	43.575 mm
Camshaft runout (maximum indicator reading)		Less than 0 02	0.05 mm
Camshaft Sprocket Runout (maximum indicator reading)			0.15 mm

Valve lifters

Parameter	Standard
Outside diameter of the push rod	Inlet	33.977-33.987 mm
	Release	29,977-29,987 mm
Outside diameter of the push rod	Inlet	34,000-34,021 mm
	Release	30,000-30,021 mm
Valve tappet clearance		0.013-0.044 mm

Valve clearances

Parameter	On a cold engine	On a hot engine* (standard/ data)
Inlet	0.26-0.34 mm	0.304-0.416 mm
Release	0.29-0.37 mm	0.308-0.432 mm

* At a temperature of approx. 80°C

Cylinder head

Parameter	Standard	Limit
Surface warping	Less than 0.03 mm	0.1 mm
Nominal height "H"	129.3-129.5 mm

Valve sizes

Valve disc diameter "D"	Inlet	33.8-34.1 mm
	Release	27.6-27.9 mm
Valve length "L"	Inlet	106.27 mm
	Release	105.26 mm
Valve stem diameter "d"	Inlet	5,465-5,480 mm
	Release	5,455-5,470 mm
Valve seating angle "a"		45°15'-45°45'
Edge thickness "T"	Inlet	11 mm
	Release	1 2 mm

Valve guide bushings

Parameter		Standard size	Increased by 0.2 repair size
Valve guide bushing	Outer diameter	9.523-9.534 mm	9.723-9.734 mm
	Inner diameter (final)	5,500-5,518 mm
Valve guide bore diameter in cylinder head		9.475-9.496 mm	9.675-9.696 mm
Press fit valve guide bushing		0.027-0.059 mm
Parameter		Standard size	Maximum size
Clearance between valve stem and valve guide	Inlet	0.020-0.053 mm	0.1 mm
	Release	0.030-0.063 mm
Elevation height "H"		13.35-13.65 mm

Valve seats

Parameter	Standard size	Increased by 0.5 repair size
Cylinder head seat recess diameter "D"	Inlet	34,700-34,727 mm	35.200-35.227
	Release	28.700-28.727 mm	29,200-29,227 mm
Valve seat outer diameter "d"	Inlet	34.808-34.824 mm	35.308-35.324 mm
	Release	28,808-28,824 mm	29.308-29.324 mm
Press fit valve seat		0.081-0.124 mm
Diameter "d1" *¹	Inlet	31.8 mm
	Release	25.3 mm
Diameter "d2" *²	Inlet	33.1-33.6 mm
	Release	26.9-27.4 mm
Angle "a1"	Inlet	60°
	Release	45°
Angle "a2"	88°45-90°15
Angle "a3"	120°
Valve seat belt width "W" *³	Inlet	1.0-1.4 mm
	Release	1.2-1.6 mm
Height "h"	Inlet	5.9-6.0 mm	5.03-5.13 mm
	Release		4.95-5.05 mm
Depth "H"	Inlet	8.04 mm
	Release	6.05 mm

• *1: Diameter formed by the intersection point of conical angles "a1" and "a2".
• *2: Diameter formed by the intersection point of conical angles "a2" and "a3".
• *3: Dimensions for mechanical processing.

Valve springs

Parameter	Standard
	Inlet	Release
Length in unloaded state	46.18-46.68 mm	45.67- 46.17 mm
Height after installation	35.30 mm	35.30 mm
Load after installation	151-175 N (15.4-17.9 kg)	140-162 N (14.3-16.5 kg)
Height with valve open	25.70 mm	26.88 mm
Load with valve open	333-379 H (34.0-38 7 kg)	283-323 H (28.9-32.9 kg)
Distinctive color marking	Green	Violet

Parameter	Limit
Valve spring squareness	2.0 mm

Cylinder block

Warping of the upper surface of the cylinder block	Limit		0.1 mm
Inner diameter of the cylinder	Standard	Class 1	84,000-84,010 mm
		Class 2	84,010-84,020 mm
Ovality	Limit		0.015 mm
Taper			0.010 mm

Class of the inner diameter of the main bearing housing in the cylinder block	Class A	55.997-55.998 mm
	Class B	55.998-55.999 mm
	Class C	55,999-56,000 mm
	Class D	56,000-56,001 mm
	Class E	56.001-56.002 mm
	Class F	56.002-56.003 mm
	Class G	56.003-56.004 mm
	Class H	56.004-56.005 mm
	Class J	56.005-56.006 mm
	Class K	56.006-56.007 mm
	Class L	56.007-56.008 mm
	Class M	56,008-56,009
	Class N	56,009-56,010 mm
	Class R	56,010-56,011 mm
	Class R	56.011-56.012 mm
	Class S	56.012-56.013 mm
	Class T	56.013-56.014 mm
	Class U	56.014-56.015 mm
	Class V	56.015-56.016 mm
	Class W	56.016-56.017 mm

Pistons

Piston skirt diameter "A"	Standard	Class 1	83,980-83,990 mm
		Class 2	83,970-83,980 mm
Measuring point "H"			39.9 mm
Piston pin bore diameter			19,993-19,999 mm
Clearance between piston and cylinder wall		Standard	0.020-0.040 mm
		Limit	0.08 mm

Piston rings

Parameter		Standard	Limit
Lateral clearance	Upper compression	0.04-0.08 m	0.11 mm
	Second compression	0.03-0.07 mm	0.10 mm
	Oil scraper	0.015-0.185 mm
Gap in the lock	Upper compression	0.20-0.30 mm	0.51 mm
	Second compression	0.50-0.65 mm	0.83 mm
	Oil scraper (scraper)	0.15-0.45 mm	0.78 mm

Piston pins

Parameter	Standard	Limit
Piston pin outer diameter	19.989-19.995 mm
Oil clearance between piston and piston pin	0.002-0.006 mm

Connecting rods

Distance between centers		138.97-139.07 mm
Bending (100)	Limit	0.15 mm
Twist (100)	Limit	0.30 mm
Inner diameter of connecting rod small end bushing	Standard	20,000-20,012 mm
Connecting rod small head bushing oil clearance	Standard	0.005-0.023 mm
	Limit	0.03 mm
Connecting rod side clearance	Standard	0.20-0.35 mm
	Limit	0.4 mm
Big End Connecting Rod Inner Diameter	Class A	47,000-47,001 mm
	Class B	47.001-47.002 mm
	Class C	47,002-47,003 mm
	Class D	47.003-47.004 mm
	Class E	47.004-47.005 mm
	Class F	47.005 47.006 mm
	Class G	47.006-47.007 mm
	Class H	47.007-47.008 mm
	Class J	47.008-47.009 mm
	Class K	47,009-47,010 mm
	Class L	47,010-47,011 mm
	Class M	47.011-47.012 mm
	Class N	47.012-47.013 mm

*After installation in the connecting rod

Connecting rod bearings

Table of bearing classes

Class		Thickness, mm	Color coding	Notes
0		1,494-1,497	Black	The class and color of the upper and lower bearings are the same
1		1,497-1,500	Brown
2		1,500-1,503	Green
3		1,503-1,506	Yellow
4		1,506-1,509	Blue
01	Upper	1,494-1,497	Black	The class and color of the upper and lower bearings are different
	Lower	1,497-1,500	Brown
12	Upper	1.497-1,500	Brown
	Lower	1,500-1,503	Green
23	Upper	1,500-1,503	Green
	Lower	1,503-1,506	Yellow
34	Upper	1,503-1,506	Yellow
	Lower	1,506-1,509	Blue

Table of bearings of reduced repair size

Parameter	Thickness	Crankpin diameter
Reduced by 0.25 repair size	1.623-1.631 mm	Regrind the crankpin so that the oil clearance is within specification.

Connecting rod bearing oil clearance

Connecting rod bearing oil clearance	Standard	0.037-0.047 mm
	Limit	0.07 mm