Both Crossfire engines are here side by side, the way the manual prints them: the naturally aspirated 3.2L V6 and the supercharged SRT version of the same engine. General specifications come first, then the machinist’s numbers — bores, clearances, ring gaps, valve dimensions — then oil pressure, and finally the engine torque tables.
A note on where things live: this chapter carries the engine’s own torque specifications. Torque for everything else on the car — suspension, brakes, steering, body and the rest — is gathered in the Torque Specifications chapter.
4. Engine Specifications (Group 9)
General specifications — 3.2L V6 (base) and 3.2L SRT (supercharged)
| Description | Base 3.2L | SRT 3.2L |
|---|---|---|
| Engine type | 90° bank angle, liquid cooled, dual tuned intake manifold, twin ignition | SOHC 18-valve 90° supercharged V-6 |
| Displacement | 3.2 L (195.2 cu. in.) | 3.2 L (195.2 cu. in.) |
| Bore | 89.9 mm (3.54 in.) | 89.9 mm (3.54 in.) |
| Stroke | 84 mm (3.31 in.) | 84 mm (3.31 in.) |
| Valve system | SOHC, 2 intake + 1 exhaust valve per cylinder, roller rocker arms | Same |
| Compression ratio | 10.0:1 | 9.0:1 |
| Brake horsepower | 215 (160 kW) @ 5700 rpm | 330 (246 kW) @ 6100 rpm |
| Torque | 230 lb. ft. (312 N·m) @ 3000 rpm | 310 lb. ft. (420 N·m) @ 3500 rpm |
| Firing order | 1-4-3-6-2-5 | 1-4-3-6-2-5 |
| Lubrication | Pressure feed – full flow filtration | Same |
| Cooling system | Reverse flow – forced circulation | Same |
| Cylinder block | Cast aluminum alloy with Siltec bore liners | Same |
| Crankshaft | Forged steel | Forged steel |
| Connecting rods | Forged steel | Forged steel |
| Pistons | Aluminum alloy – flat topped | Aluminum alloy – flat topped |
| Compression pressure | 689 kPa (100 psi) | 689 kPa (100 psi) |
| Max. variation between cylinders | 172 kPa (25 psi) | 172 kPa (25 psi) |
| Supercharger | — | Helical two-rotor design |
Cylinder block / pistons / crankshaft (both engines, as printed)
| Description | Specification |
|---|---|
| Cylinder bore diameter — standard | 89.900 – 89.915 mm (3.539 – 3.540 in.) |
| Cylinder bore diameter — repair max. | 90.150 – 90.165 mm (3.549 – 3.550 in.) |
| Bore out of round | 0.014 mm (.0005 in.) |
| Bore taper | 0.03 mm (.0011 in.) |
| Piston diameter | 89.87 – 89.90 mm (3.538 – 3.539 in.) |
| Piston ring groove depth No. 1 | 3.1 mm (0.122 in.) |
| Piston ring groove depth No. 2 | 3.1 mm (0.122 in.) |
| Piston ring groove depth No. 3 | 3.5 mm (0.137 in.) |
| Piston ring gap — compression ring No. 1 | 0.20 – 0.35 mm (0.007 – 0.013 in.) |
| Piston ring gap — compression ring No. 2 | 0.20 – 0.40 mm (0.007 – 0.015 in.) |
| Piston ring width — compression rings | 1.5 mm (0.059 in.) |
| Piston ring width — oil ring (steel rails) | 3.5 mm (0.137 in.) |
| Connecting rod bearing clearance | 0.026 – 0.054 mm (0.001 – 0.002 in.) |
| Main bearing clearance — radial | 0.030 – 0.052 mm (0.001 – 0.002 in.) |
| Main bearing clearance — axial | 0.100 – 0.266 mm (0.003 – 0.010 in.) |
Cylinder head / valves (both engines, as printed)
| Description | Specification |
|---|---|
| Valve seat width — intake (as labeled in manual) | 31.000 – 31.016 mm (1.220 – 1.221 in.) |
| Valve seat width — exhaust (as labeled in manual) | 35.000 – 35.016 mm (1.378 – 1.379 in.) |
| Valve face angle | 45° ± 1.5° (base); 45° ± 15′ (SRT, as printed) |
| Valve stem diameter — intake | 6.975 mm (0.274 in.) |
| Valve stem diameter — exhaust | 6.974 mm (0.274 in.) |
| Valve head diameter — intake | 36 ± 0.4 mm (1.417 in.) |
| Valve head diameter — exhaust | 41 ± 0.1 mm (1.614 in.) |
| Valve length — intake | 119.4 ± 0.2 mm (4.700 in.) |
| Valve length — exhaust | 122.2 ± 0.2 mm (4.811 in.) |
| Valve margin — intake | 1.2 mm (0.047 in.) |
| Valve margin — exhaust | 1.6 mm (0.062 in.) |
Oil pressure (engine at operating temperature)
| Condition | Specification |
|---|---|
| Curb idle | 34.5 kPa (5 psi) minimum |
| 3000 rpm | 300 – 724 kPa (45 – 105 psi) |
Source: Group 9 — Specifications – Engine (PDF p.2652); Specifications – Engine (SRT) (PDF p.2776); Engine Oil Pressure test (PDF p.2725 approx.)
Engine torque specifications — 3.2L (base)
| Description | N·m | Ft. Lbs. | In. Lbs. |
|---|---|---|---|
| A/C compressor bolts | 20 | 15 | 177 |
| Balance shaft bolts | 20 | 15 | 177 |
| Body bolts | 40 | 30 | 354 |
| Camshaft bearing bridge — stage 1 | 15 | 11 | 133 |
| Camshaft bearing bridge — stage 2 | +90° clockwise | ||
| Camshaft sprocket bolts — stage 1 | 50 | 37 | 443 |
| Camshaft sprocket bolts — stage 2 | +90° clockwise | ||
| Connecting rod bolts — stage 1 | 5 | 4 | 44 |
| Connecting rod bolts — stage 2 | 25 | 18 | 159 |
| Connecting rod bolts — stage 3 | +90° clockwise | ||
| Cooler line bolts | 10 | 7 | 89 |
| Crossmember to body bolts | 40 | 30 | 354 |
| Cylinder head cover bolts | 10 | 7 | 89 |
| Damper bolt — stage 1 | 200 | 148 | 1770 |
| Damper bolt — stage 2 | +90° clockwise | ||
| EGR fitting | 40 | 30 | 354 |
| End cover bolts | 10 | — | 89 |
| Engine mount bolts | 30 | 22 | 266 |
| Front engine mount to front axle carrier bolts | 55 | 41 | 487 |
| Engine mount to transmission bolts | 50 | 37 | 443 |
| Engine upper mount bolt | 55 | 41 | 487 |
| Engine lower mount bolt | 35 | 26 | 310 |
| Engine support bolts | 20 | 15 | 177 |
| Exhaust flange bolts | 20 | 15 | 177 |
| Exhaust manifold to cylinder head bolts | 35 | 26 | 310 |
| Flywheel bolts — stage 1 | 45 | 33 | 398 |
| Flywheel bolts — stage 2 | +90° clockwise | ||
| Fuel supply line to rail | 38 | 28 | 336 |
| Cylinder head bolts — stage 1 | 20 | 15 | 177 |
| Cylinder head bolts — stage 2 | 50 | 37 | 443 |
| Cylinder head bolts — stage 3 | +60° – 70° clockwise | ||
| Cylinder head bolts — stage 4 | +60° – 70° clockwise | ||
| Intake manifold bolts | 20 | 15 | 177 |
| Lower splash shield screws | — | 5 | 44 |
| Main bearing journal cap bolts M8 — stage 1 | 20 | 15 | 177 |
| Main bearing journal cap bolts M8 — stage 2 | +90° clockwise | ||
| Main bearing journal cap bolts M10 — stage 1 | 30 | 22 | 266 |
| Main bearing journal cap bolts M10 — stage 2 | +90° clockwise | ||
| Manifold bolts | 16 | 12 | 142 |
| Oil cooler bolts | 11 | 8 | 97 |
| Oil filter adaptor center bolt | 70 | 52 | 620 |
| Oil filter cap | 25 | 18 | 97 (as printed) |
| Oil indicator tube bolt | 10 | 7 | 89 |
| Oil pan bolts, lower | 14 | 10 | 124 |
| Oil pan bolts, upper — M6 | 10 | 7 | 89 |
| Oil pan bolts, upper — M8 | 20 | 15 | 177 |
| Oil pan drain plug | 30 | 22 | 266 |
| Oil pressure/level sensor screws | 10 | 7 | 89 |
| Oil spray nozzle bolts | 15 | 11 | 133 |
| Power steering pump ground bolt | 25 | 18 | 97 (as printed) |
| Power steering pump high pressure line | 45 | 33 | 398 |
| Timing chain cover bolts | 20 | 15 | 177 |
| Timing chain tensioner bolt | 80 | 59 | 708 |
| Transmission mount bolts | 40 | 30 | 354 |
Additional SRT torque rows (all other rows same as base table)
| Description | N·m | Ft. Lbs. | In. Lbs. |
|---|---|---|---|
| Charge air cooler to supercharger | 20 | 15 | 177 |
| Intake plenum to supercharger bolts | 10 | 7 | 88 |
| Supercharger to cylinder head bolts | 23 | 17 | 203 |
Source: Group 9 — Specifications – Torque (PDF p.2653–2655); SRT Specifications – Torque (PDF p.2777–2779)