Cylinder Head And Valve Train
WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
CYLINDER HEAD AND VALVE TRAIN
| Item | Specification |
|---|---|
| Combustion Chamber Volume (cc) | 50.1-47.1 |
| Valve Guide Bore Diameter | |
| Intake and Exhaust | 7.017-7.042 mm (0.2762-0.2772 in) |
| Valve Seats | |
| Width - Intake and Exhaust | 2.0-2.5 mm (0.078-0.098 in) |
| Angle | 44.5 Degrees |
| Runout (T.I.R.) | 0.035 mm (0.0013 in) |
| Gasket Surface Flatness | 0.08 mm (0.003 in) over 152.0 mm (6.00 in) |
| Valve Stem to Guide Clearance | |
| Intake | 0.026-0.071 mm (0.001-0.0027 in) |
| Exhaust | 0.038-0.083 mm (0.0015-0.0032 in) |
| Valve Head Diameter | |
| Intake | 40.0 mm (1.57 in) |
| Exhaust | 33.0 mm (1.30 in) |
| Valve Face Runout Limit | 0.05 mm (0.002 in) |
| Valve Face Angle | 45.62 Degrees |
| Valve Stem | |
| Diameter (Std.) | |
| Intake | 6.971-6.991 mm (0.2744-0.2752 in) |
| Exhaust | 6.959-6.979 mm (0.2739-0.2747 in) |
| Oversize | |
| Intake | 8.340-8.320 mm (0.3283-0.3276 in) |
| Exhaust | 8.328-8.308 mm (0.3279-0.3271 in) |
| Oversize | |
| Intake | 8.720-8.700 mm (0.3433-0.3425 in) |
| Exhaust | 8.708-8.688 mm (0.3428-0.3420 in) |
| Valve Springs | |
| Valve Open to Maximum Lift | 912 N @ 29.74 mm (1.17 in) |
| Valve Closed | 304 N @ 40.52 mm (1.60 in) |
| Free Length (Approximate) | 46.4 mm (1.89 in) |
| Installed Spring Height | 44.17-41.98 mm (1.736-1.650 in) |
| Service Limit | 10% Force Loss @ Specified Height |
| Rocker Arm Ratio | 1.61 |
| Valve Tappet, Hydraulic | |
| Diameter (Std.) | 22.206 mm (0.874 in) |
| Clearance to Bore | 0.018-0.069 mm (0.0007-0.0027 in) |
| Service Limit | 0.127 mm (0.005 in) |
| Hydraulic Leak-Down Rate | a |
| Collapsed Tappet Gap | (Nominal) |
| Intake | 2.23-4.77 mm (0.088-0.189 in) |
| Exhaust | 2.23-4.77 mm (0.088-0.189 in) |
| Distributor Shaft Bearing Bore Diameter | 22.268-22.230 mm (0.08767-0.8752 in) |
| Tappet Bore Diameter | 22.224-22.275 mm (0.875-0.877 in) |
| Camshaft Bore Inside Diameter | |
| No. 1 | 54.688-54.713 mm (2.1531-2.1541 in) |
| No. 2 | 54.188-54.213 mm (2.1334-2.1344 in) |
| No. 3 | 54.188-54.213 mm (2.1334-2.1344 in) |
| No. 4 | 54.688-54.713 mm (2.1531-2.1541 in) |
a 20-200 seconds to leak-down 3.18 (0.125 in) with 225 Newtons (50 pounds) load and tappet filled with leak-down fluid.