2g 6G74

From Mitsipedia
This page refers to the 24 valve SOHC 6G74 V6 used in the KJ through KW Verada and TJ through TW Magna. For the earlier 147kW versions see 1g_6G74. For the 180 kW Ralliart version see 6G74_ralliart. For other versions of this engine not used in Magnas see 6G7x family.

With the release of the TJ/KJ series, the 6G74 underwent a transformation in order to increase performance, reduce fuel consumption and reduce emissions. The result was a revised 6G74.

The revised 6G74 was virtually the same as the early 6G74 except that it used different camshafts and engine management systems.

The revised 6G74 also bought about increases in power for Magna Sports and Magna VR-X which had a slight increase over the standard Magna by use of a free-flowing exhaust.

While all of the revised 6G74s were the same basic design, it came out in three power levels. These were:

  • 150kW: This was the initial revised 6G74 used in the TJ/KJ series.
  • 155kW: The first update to the revised 6G74, used a differently calibrated engine management system to produce extra power while reducing city run fuel consumption. This change was made in the TJ MY02/KJ MY02.
  • 163kW: The "sports" power level, used in non AWD sports variants. Extra power achieved by using a free-flowing exhaust system.

Technical Specifications

24 valve 3.5 Litre V6 6G72 Sports Engine
Type Transversely mounted 6 cylinder in vee configuration with 60 degree bank angle. Single overhead cam with 4 valves per cylinder
Displacement 3497cc (3.5 Litres)
Bore 93.0mm
Stroke 85.8mm
Maximum oversize 1.00mm
Compression Ratio 9.0:1
Firing Order 1,2,3,4,5,6
Power Output 150 kW @ 5000rpm, 300 Nm @ 4000 rpm

155kW @ 5000rpm, 316Nm @ 4000rpm (From August 2001)
163 kW @ 5250rpm, 317Nm @ 4500rpm (Sports models)

Type Alluminum Alloy with pentroof combustion chambers and centrally mounted spark plugs
Inlet Valve Diameter 34.30mm
Exhaust Valve Diameter 31.8mm
Valve Face Angle 45 º
Valve Clearance Maintained by hydraulic lash adjusters
Inlet Opens 13º BTDC
Inlet Closes 55º ABDC
Inlet Duration 248º
Exhaust Opens 51º BBDC
Exhaust Closes 17º ATDC
Exhaust Duration 248º
Overlap 30º
Inlet Cam Lobe Height 37.58mm
Exhaust Cam Lobe Height 36.95mm
3 cylinder
3A9x 3A90 3A91 3A92
4 cylinder
Neptune 4G41 4G42
Orion 4G11 4G12 4G13 4G15 4G17 4G18 4G19 G4ED
Sirius 4G61 4G62 4G63 4G64 4G67 4G69
Astron 4G51 4G52 4G53 4G54
Astron II Original Revised
Saturn 4G30 4G31 4G32 4G33 4G37
4G9x 4G91 4G92 4G93 4G94
4A9x 4A90 4A91 4A92
4B1x 4B10 4B11 4B11T 4B12
Inline 6
Saturn 6 6G34
6G7x 6G71 6G72 SOHC 12v 6G72 SOHC 24v 6G72 DOHC Early 6G74 Late 6G74 Ralliart 6G74 6G75
6A1x 6A10 6A11 6A12 6A13
6B3x 6B31
8A80 8A80