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