From Mitsipedia
This page refers to the Sirius 2.4L engine used in the TE and TF Magna. For information on other Sirius engines please see Sirius family.

The TE and TF Magna used the 4G64, a 2.4 Litre single overhead cam belt-driven 16 valve engine. It was the only engine to be used in the Magna which was not assembled at Lonsdale. The engine was instead imported from Shiga in Japan.

The version of the 4G64 used in the Magna featured roller rockers, a one-piece cast camshaft and an alluminum intake manifold. As with other 4G64s there were different camshafts for automatic and manual transmissions.

As with the Astron II, the Sirius engine featured balance shafts, but unlike the Astron these were belt driven, eliminating the chain rattle the Astron became known for.

Due to the $750 price difference between the Sirius and the V6 engine, Sirius powered Magnas are relatively uncommon.

Technical Specifications

Type In line 4 cylinder single overhead cam with counter balance shafts. Transversely mounted, 16 valves
Displacement 2350cc (2.4 litres)
Bore 86.5mm
Stroke 100mm
Maximum oversize 1.00mm
Compression Ratio 9.50:1
Piston bowl volume 20.7cc
Firing Order 1,3,4,2
Power Output 105 kW @ 5500 rpm , 205 Nm @ 3000 rpm
Type Alluminum Alloy with pentroof combustion chambers and crossflow design. 4 valves per cylinder.
Inlet Valve Diameter 34.30mm
Exhaust Valve Diameter 31.80mm
Valve Face Angle 45 - 45.5º
Valve Clearance Maintained by hydraulic lash adjusters
Inlet Opens 16º BTDC
Inlet Closes 60º ABDC (Manual transmission), 53º ABDC (Automatic Transmission)
Inlet Duration 256º (Manual), 249º (Automatic)
Exhaust Opens 60º BBDC (Manual transmission), 50º BBDC (Automatic transmission)
Exhaust Closes 16º ATDC
Exhaust Duration 256º (Manual), 246º (Automatic);
Overlap 32º
Inlet Cam Lobe Height 37.39mm
Exhaust Cam Lobe Height - Automatic Transmissions 37.14mm
Exhaust Cam Lobe Height - Manual Transmissions 36.83mm
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