Nissan MR16DDT / Renault M5M

Nissan MR16DDT / Renault M5MThe Nissan MR16DDT is a 1.6 l (1,618 cc, 98.78 cu.in.) straight-four 4-stroke turbo-charged gasoline engine from Nissan MR-family. The MR16DDT also called DIG-T (Direct Injection Gasoline Turbo-charged) engine. The MR16DDT engine was co-developed with Renault and in the Renault production line it is called M5M.

The MR16DDT (M5M) features a lightweight aluminum block with a fully balanced five-bearings crankshaft and aluminum head with two camshafts (DOHC) and four valves per cylinder.

Compression ratio rating is 9.5-10.5:1. Cylinder bore and piston stroke are 79.7 mm (3.138 in) and 81.1 mm (3.193 in), respectively. The MR16DDT (M5M) engine has an electronic throttle, continuous variable valve timing system on both shafts (Twin CVTC), electronic ignition with individual coils on each spark plug, direct injection mechanism and turbocharger.

The power output is from 188 HP (140 kW; 190 PS) at 5,600 rpm up to 215 HP (160 kW; 218 PS) at 6,000 rpm on Nissan Juke RS NISMO. The torque is 240-280 Nm (24.5-28.5 kg·m, 177-206.5 lb·ft) of torque.

The breakdown of the engine code is as follows:

  • MR – Engine Family
  • 16 – 1.6 Liter Displacement
  • D – DOHC (Dual Overhead Camshafts)
  • D – Direct Cylinder Fuel Injection
  • T – Turbocharged

General information

Engine Specifications
Engine codeMR16DDT / M5M
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline (petrol)
Production2010-
Displacement1.6 L, 1,618 cc (98.78 cu. in.)
Fuel systemDirect injection
Power adderTurbocharger
Power output 188 HP (140 kW; 190 PS) at 5,600 rpm
197 HP (147 kW; 200 PS) at 6,000 rpm
210 HP (157 kW; 214 PS) at 6,000 rpm
215 HP (160 kW; 218 PS) at 6,000 rpm
Torque output 240 Nm (24.5 kg·m, 177.0 lb·ft) at 5,200 rpm
250 Nm (28.5 kg·m, 184.4 lb·ft) at 4,800 rpm
250 Nm (28.5 kg·m, 184.4 lb·ft) at 5,200 rpm
250 Nm (28.5 kg·m, 184.4 lb·ft) at 6,000 rpm
280 Nm (28.5 kg·m, 206.5 lb·ft) at 4,800 rpm
Firing order1-3-4-2
Dimensions (L x W x H):
Weight

Cylinder block

Cylinders in the Nissan MR16DDT / Renault M5M engines are fitted at an offset to minimize friction arising from the angle of the connecting rod as a piston descends into the cylinder. The resulting smoother reciprocating motion of the pistons contributes to high power output and high torque as well as fuel economy. Also, the structure is designed so that the piston remains in the upper part of the cylinder longer than in a conventional engine (piston velocity slows down). This permits more efficient use of combustion energy and effectively improves thermal efficiency.

The MR-family engines have cracking-processed connecting rods. These integrally cast con rods offer lighter weight than conventional con rods, which are constructed in two parts, separated at the eye where they join the crankshaft. The cracking processed conrod is manufactured in one piece, then the lower connecting rod eye is broken in two (the cracking process) and, finally, the two parts are rejoined after mounting. Mating of the uneven surfaces created by the cracking process results in a very precise joint.

The crankshaft journals are finished with a polishing tape to produce a mirror-like finish. The result is a thorough reduction in friction on these bearing surfaces of key engine components. Cylinder bore of the MR16DDT (M5M) is 79.7 mm (3.138 in) and stroke is 81.1 mm (3.193 in). The compression ratio rating is 9.5:1 or 10.5:1 depending on the car model. The pistons are each fitted with two compression rings and a single oil ring.

Cylinder block
Cylinder block alloyAluminium
Compression ratio:9.5:1 or 10.5:1
Cylinder bore:79.7 mm (3.138 in)
Piston stroke:81.1 mm (3.193 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Cylinder inner diameter (standard):79.700-79.710 mm (3.1378-3.1382 in)
Piston skirt diameter (standard):79.670-79.680 mm (3.1366-3.1370 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:Top0.20-0.30 mm (0.008-0.012 in)
Second0.29-0.44 mm (0.0114-0.0173 in)
Oil0.15-0.45 mm (0.006-0.018 in)
Connecting rod bushing inner diameter:22.000-22.012 mm (0.8661-0.8666 in)
Connecting rod big end diameter:47.000 mm (1.8504 in)
Connecting rod center distance:138.97-139.07 mm (5.47-5.48 in)
Crankshaft main journal diameter:51.978-51.979 mm (2.0464-2.0464 in)
Crankpin diameter:43.970 mm (1.7311 in)

Main bearing cap bolts tightening procedure and torque specs:

  • Step 1: 34.3 Nm; 3.5 kg·m; 25 ft·lb
  • Step 2: Turn all bolts 70°

After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.

Connecting rod bearing bolts

  • Step 1: 27.4 Nm; 2.8 kg·m; 20 ft·lb
  • Step 2: 0 Nm; 0 kg·m; 0 ft·lb
  • Step 3: 19.6 Nm; 2.0 kg·m; 14 ft·lb
  • Step 4: Turn all bolts 60°

Crankshaft pulley bolt

  • Step 1: 29.4 Nm; 3.0 kg·m; 22 ft·lb
  • Step 2: Turn another 60 degrees clockwise

Flywheel (M/T) or Drive plate (CVT) fixing bolts

  • 108 Nm; 11 kg·m; 80 ft·lb

Cylinder head

The cylinder head is made of strong, light aluminum alloy which gives it good cooling efficiency. Each camshaft is supported by five bearings. The MR16DDT (M5M) has twin continuous variable valve timing system (CVTC) on the intake and exhaust camshafts. C-VTC enables variable valve timing in response to engine rpm and throttle opening. Enhanced control and reduced system friction improve response and optimize torque characteristics.

The surface of the camshafts has been nano-finish coated. The nano-finished camshaft polished smooth like a mirror and the DLC valve lifter achieve a major reduction in friction. The top of the beehive valve spring has narrowed, realizing compact retainers and also further contributing to friction reduction.

Intake valves are 31.3 mm in diameter, intake duration is 228°, and the exhaust valves are 25.7 mm, exhaust duration is 228°. The MR16DDT motor does not have hydraulic lifters, so special valve lifters are used to adjust the valve clearance.

Cylinder head
Valve Arrangement:DOHC, chain drive
Cylinder head height:130.9 mm (5.15 in)
Valves:16 (4 valves per cylinder)
Valve timing:INTAKE228°
EXHAUST228°
Valve head diameter:INTAKE31.2-31.5 mm (1.228-1.240 in)
EXHAUST25.6-25.9 mm (1.008-1.020 in)
Valve length:INTAKE107.08 mm (4.22 in)
EXHAUST106.06 mm (4.18 in)
Valve stem diameter:INTAKE5.465-5.480 mm (0.2152-0.2157 in)
EXHAUST5.455-5.470 mm (0.2148-0.2154 in)
Valve spring free length:INTAKE49.4-49.6 mm mm (1.945-1.953 in)
EXHAUST54.5-54.7 mm (2.146-2.154 in)
Camshaft cam height:INTAKE44.605-44.795 mm (1.7560-1.7635 in)
EXHAUST43.175-43.365 mm (1.6997-1.7072 in)
Camshaft journal diameter:№127.935-27.955 mm (1.0998-1.1006 in)
№2, 3, 4, 524.950-24.970 mm (0.9823-0.9381 in)

Head tightening procedure and torque specs:

  • Step 1: 40 Nm; 4.1 kg·m; 30 ft·lb
  • Step 2: Turn all bolts 100°
  • Step 3: Loosen all bolts completely
  • Step 4: 40 Nm; 4.1 kg·m; 30 ft·lb
  • Step 5: Turn all bolts 95°
  • Step 6: Turn all bolts another 95°

Camshaft sprocket bolts

  • Step 1: 35.0 Nm; 3.6 kg·m; 26 ft·lb
  • Step 2: Turn all bolts 30°

Problems and malfunctions

The Nissan MR16DDT is reliable and durable. The engine has a timing chain, their service life is about 150,000 miles of mileage (200,000-250,000 km). The valve clearance needs to be adjusted every 60,000 miles of mileage (90,000 km).

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
Standard16.0 kg/cm2 (226 psi) / 250 rpm
Minimun12.0 kg/cm2 (172 psi) / 250 rpm
Compression differential limit between cylinders1.0 kg/cm2 (15 psi) / 250 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 APISL/SM
Engine oil capacity (Refill capacity) With filter change 4,80 l
Without filter change 4,50 l
Oil change interval, km (miles)5,000-10,000 (3,000-6,000)
Oil Pressure, kPa (bar, kg/cm 2, psi)
Ignition system
Spark plugNGK: DILKAR7C9H
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 – 0.33 mm (0.013 in)]

Valve lifters are available in 26 sizes range from 3.00 mm (0.1181 in) to 3.50 mm (0.1378 in), in steps of 0.02 mm (0.0008 in).

Example (intake valve):
R = 3.10 mm
M = 0.52 mm
N = 3.10 + (0.52 – 0.30) = 3.32 mm, so we need a valve lifter with identification mark 332.

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
Nissan Juke2011–
Nissan Juke RS NISMO2014–
Nissan Tiida (hatchback)2013–
Nissan Pulsar2013–
Nissan Sylphy2013–
Nissan Deltawing (Race car)2012
Renault Sport Clio2013–
Renault Samsung SM5 TCE
Nissan X-Trail2015-
Nissan Teana L332015-
Renault Talisman TCE2015-
Renault Samsung SM6 TCE2016-
Nissan Sentra SR Turbo & NISMO2017-
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4 Comments

  1. Hello,
    Is the MR16DDT engine in the Nissan Qashqai 1.6 DIG-T (the year of manufacture 2018)?
    The engine has 163HP 120kW.
    Where was the power of the engine then?
    Chip tuning?

    Thanks in advance,
    ALES

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