Engine Specifications
WARNING: This page is about a different variant/trim than selected.
GENERAL SPECIFICATIONS (7.4L)
| Application |
Specification |
| Displacement |
454 Cu. In. |
| Bore |
4.25" (107.95 mm) |
| Stroke |
4.0" (101.6 mm) |
| Compression Ratio |
9.0:1 |
| Fuel System |
SFI |
CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS (7.4L)
| Application |
In. (mm) |
| Crankshaft End Play |
.005-.011 (.127-.279) |
| Crankshaft Run Out |
.002 (.051) |
| Main Bearings |
| Journal Diameter |
2.7482-2.7489 (69.804-69.822) |
| Journal Out-Of-Round |
| Standard |
.0004 (.01) |
| Service |
.0010 (.03) |
| Journal Taper |
| Standard |
.0004 (.01) |
| Service |
.0010 (.03) |
| Oil Clearance (Standard) |
| No. 1 |
.0017-.003 (.043-.076) |
| No. 2, 3 & 4 |
.0011-.0024 (.028-.061) |
| No. 5 |
.0025-.0038 (.064-.097) |
| Oil Clearance (Service) |
| No. 1, 2, 3 & 4 |
.0010-.0030 (.025-.076) |
| No. 5 |
.0025-.0040 (.063-.101) |
| Connecting Rod Bearings |
| Journal Diameter |
2.199-2.1996 (55.855-55.870) |
| Journal Out-Of-Round |
| Standard |
.0005 (.013) |
| Service |
.0010 (.025) |
| Journal Taper |
| Standard |
.0005 (.013) |
| Service |
.0011-.0039 (.028-.099) |
| Oil Clearance |
.0011-.0029 (.028-.074) |
| Side Clearance |
.0013-.023 (.033-.584) |
PISTONS, PINS & RINGS (7.4L)
| Application |
In. (mm) |
| Piston Clearance |
| Standard |
.0018-.0030 (.046-.076) |
| Service |
.0018-.0048 (.046-.219) |
| Pin Diameter |
.9895-.9897 (25.133-25.137) |
Piston Fit
|
| Standard |
.0002-.0007 (.005-.017) |
| Service |
.0002-.0010 (.005-.025) |
| Rod Fit |
.0021-.0031 (.053-.079) Interference |
| Rings |
| No. 1 |
| End Gap (Standard) |
.01-.018 (.254-.457) |
| End Gap (Service) |
.010-.028 (.254-.711) |
| Side Clearance (Standard) |
.0012-.0029 (.031-.074) |
| Side Clearance (Service) |
.0012-.0039 (.0991-.3050) |
| No. 2 |
| End Gap (Standard) |
.016-.024 (.406-.609) |
| End Gap (Service) |
.016-.034 (.406-.863) |
| Side Clearance (Standard) |
.0012-.0029 (.030-.074) |
| Side Clearance (Service) |
.0012-.0039 (.030-.099) |
| No. 3 (Oil) |
| End Gap (Standard) |
.01-.03 (.254-.76) |
| End Gap (Service) |
.010-.040 (.254-1.016) |
| Side Clearance (Standard) |
.005-.0065 (.127-.165) |
| Side Clearance (Service) |
.005-.0075 (.127-.191) |
CYLINDER BLOCK (7.4L)
| Application |
In. (mm) |
| Cylinder Bore |
| Diameter |
4.2500-4.2507 (107.95-107.968) |
| Maximum Taper |
.0005 (.013) |
| Maximum Out-Of-Round |
.001 (.03) |
VALVES & VALVE SPRINGS (7.4L)
| Application |
Specification |
| Valve Face Angle |
45° |
| Valve Springs |
| Free Length |
2.12" (53.8 mm) |
| Installed Height |
1.838-1.869" (46.685-47.479 mm) |
| Lbs. @ In. (Nm @ mm) |
| Valve Spring Pressure |
| Valve Closed |
71-79 @ 1.838 (316-351 @ 46.685) |
| Valve Open |
238-262 @ 1.347 (1059-1165 @ 34.213) |
CYLINDER HEAD (7.4L)
| Application |
Specification |
| Valve Seats |
| Intake Valve |
| Seat Angle |
46° |
| Seat Width |
.030-.06" (.762-1.524 mm) |
| Maximum Seat Runout |
.002" (.05 mm) |
| Exhaust Valve |
| Seat Angle |
46° |
| Seat Width |
.06-.095" (1.524-2.413 mm) |
| Maximum Seat Runout |
.002" (.05 mm) |
| Valve Guide Oil Clearance |
| Intake Valve |
| Standard |
.001-.003" (.025-.074 mm) |
| Service |
.0010-.0037" (.025-.094 mm) |
| Exhaust Valve |
| Standard |
.0012-.0031" (.030-.079 mm) |
| Service |
.0012-.0049" (.030-.124 mm) |
| Warpage |
.004" (.1 mm) |
CAMSHAFT (7.4L)
| Application |
In. (mm) |
| Journal Diameter |
1.9477-1.9497 (49.471-49.522) |
| Lobe Lift |
| Intake |
.2801-.2841 (7.115-7.215) |
| Exhaust |
.2823-.2863 (7.170-7.272) |