Cylinder Head & Valve Train
WARNING: This page is about a different car, the 2007 Mazda B3000, 2006 Mazda B3000, 2005 Mazda B3000, 2004 Mazda B3000, and 2003 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
CYLINDER HEAD & VALVE TRAIN SPECIFICATIONS
| Item | Specification | |||
|---|---|---|---|---|
| Combustion Chamber Volume (cc) | 50.1-47.1 | |||
| Valve Guide Bore Diameter | ||||
| Intake & Exhaust | 8.745-8.720 mm (0.3443-0.3443 In.) | |||
| Valve Seats | ||||
| Width - Intake & Exhaust | 1.5-2.0, (.06-.08 In.) | |||
| Angle | 45° | |||
| Runout (T.I.R.) | 0.076 mm (0.003 In.) | |||
| Bore Diameter (Insert Counterbore Diameter) | 47.097 mm (1.8542 In.) Max. | |||
| Intake | 47.072 mm (1.8532 In.) Max. | |||
| Exhaust | 39.730 mm (1.5645 In.) Max. | |||
| Gasket Surface Flatness | 0.08 mm (0.003 In.) Over 152.0 mm (6.00 In.) | |||
| Valve Stem To Guide Clearance | ||||
| Intake | 0.026-0.068 mm (.001-0.0027 In.) | |||
| Exhaust | 0.038-0.081 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 | 44° | |||
| Valve Stem Diameter (Standard) | ||||
| Intake | 7.960-7.940 mm (0.3134-0.3126 In.) | |||
| Exhaust (Oversize) | 7.948-7.928 mm (0.3129-0.3121 In.) | |||
| Intake | 8.340-8.320 mm (0.3283-0.3276 In.) | |||
| Exhaust (Oversize) | 8.328-8.308 mm (0.3279-0.3271 In.) | |||
| Intake | 8.720-8.700 mm (0.3433-0.3425 In.) | |||
| Exhaust | 8.708-8.688 mm (0.3428-0.3420 In.) | |||
| Valve Springs | ||||
| Compression Pressure | N [Lbf.] @ Spec. Length) | |||
| Valve Open To Maximum Lift | 800.6N (180 Lbs.) 29.5 mm (1.16 In.) | |||
| Valve Closed | 288.1N (65 Lbs.) 40.1 mm (1.58 In.) | |||
| Free Length (Approximate) | 46.7 mm (1.84 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 Collapsed Tappet Gap (Nominal) |
(1) | |||
| 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 | |||
| Tappet Bore Diameter | 0.08767-0.8752 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.) | |||
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