8-valve petrol engine (Mazda Capella GD)

Cylinder head

Cylinder head height	91.95- 92.05 mm
Permissible warpage of the cylinder head surface	0.15 mm
Permissible warping of the branch pipe	0.10 mm
Max. permissible finishing of cylinder head surface	0.20 mm
Height of cylinder head, new	91.95-92.05 mm
Valve seat angle	45°

Inner diameter	8,070-8,090 mm
Cylinder head installation temperature	80—100°C
Installation size of guides	19.1—19.6 mm

Length of free state:
- external springs	52.0 mm (minimum length 51.5 mm)
- internal springs	44.0 mm (minimum length 43.3 mm)
Permissible warping on the upper side	1.8 mm
Length when installed:
- external springs	36.5 mm at 13.1 kg
- internal springs	41.0 mm at 19.2 kg

Valve seat angle	45°
Valve seat width	1.2-1.6 mm
Valve seat depth	the protruding length of the valve tappet is measured

Axial clearance of the camshaft	0.08-0.16 mm
Max axial clearance	020 mm
Max camshaft deflection	0.03 mm
Clearance in camshaft bearings:
— front bearing (No. 1)	0.035-0.085 mm
— medium bearings (No. 2, 3, 4)	0.065-0.115 mm
— rear bearing (No. 5)	0.035-0.085 mm
- wear limit (all bearings)	0.15 mm
Bearing journal diameter:
- front bearing	31.940-32.035 mm
- middle bearing	31.910-32.065 mm
- rear bearing	31.940-32.035 mm
Wear limit	less than 0.05 mm
Height of projection:
— intake valves	37.965 mm wear limit
- exhaust valves	37,960 mm wear limit

Inner diameter of rocker arm	16,000-16,027 mm
Rocker shaft diameter	15.966-15.984 mm
Rocker arm working clearance	0.016-0.061 mm
Wear limit	0.10 mm

Piston rings	2 piston rings, 1 three-piece oil scraper piston ring
Piston pins	press fit
Piston diameter:
- 1.6-liter engine	80.944–80.964 mm
— 1,8; 2.0-liter	85.944-85.964 mm
Permissible deviations:
- except for the 1.6-liter engine	0.25 and 0.50 mm
- 16-liter engine	0,25; 0,50; 0.75 and 1.0 mm
Piston working clearance:
— nominal size	0.036-0.075 mm
- wear limit	0.15 mm
Piston ring tappet clearance:
- upper ring	0.20-0.30 mm
- middle ring	0.15-0.30 mm
- oil scraper piston ring	0.20-0.70 mm
- wear limit	1.00 mm
Maximum ring clearance in piston groove:
- upper ring	0.030-0.070 mm
- middle ring	0.030-0.070 mm
- wear limit	0.15 mm
Piston ring thickness:
- upper ring	1.47-1.49 mm
- the second ring	1.47-1.49 mm
Permissible deviations of piston ring	like a piston

Diameter	21,974–21,980 mm
Shrink fit in the connecting rod	0.013-0.037 mm
Working clearance in the piston	0.008-0.024 mm
Installation pressure	500-1500 kg
Working clearance in the lower connecting rod bushing	the piston should move with a little effort, but without any gap

Length from center to center:
- 16-liter engine	135.95-136.05 mm
- other	151.95-152.05 mm
Connecting rod head bore	21,943–21,961 mm
Permissible twisting and bending	0.04 mm per 100 mm of length
Axial clearance on the crankshaft journals	0.11-0.26 mm
- wear limit	0.30 mm
Connecting rod bearing working clearance	0.027-0.067 mm
- wear limit	0.10 mm
Permissible deviation of the bearing shell	0,25; 0.50 and 0.75 mm

Number of main bearings	5
Perception of axial pressure	through flanged bearing shells on the middle bearing
Main/connecting rod bearing design	thin-walled bearing shells
Crankshaft axial clearance	0.03-0.18 mm
- wear limit	0.30 mm
Radial clearance (working clearance) main bearing:
— nominal clearance, except for bearing No. 3	0.025-0.043 mm
— Nominal clearance, bearing No. 3	0.031-0.049 mm
- wear limit	0.08 mm
Radial clearance (working clearance) connecting rod bearing:
— nominal clearance	0.027-0.067 mm
- wear limit	0.10 mm
Main bearing journal diameter:
— nominal diameter	59.937-59.955 mm
- wear limit	0.05 mm
— the boundary of the grinding	0.75 mm
Max, constriction or quality	0.05 mm
Max crankshaft bending	0.03 mm
Permissible deviation of bearing shells	0,25; 0.50 and 0.75 mm
Crankshaft journal diameter:
— nominal diameter	50.940-50.955 mm
- wear limit	0.05 mm
— the boundary of the grinding	0.75 mm
Max, constriction or quality	0.05 mm
Permissible deviation of bearing shells	0.25; 0.50 and 0.75 mm
Max flywheel surface runout	0.10 mm

Cylinder block height:
- except for the FE engine	268.5 mm
— FE engine	289.0 mm
Max. warpage of the sealing surface	0.15 mm
Cylinder bores:
- 1.6-liter engine	81,000-81,019 mm
- other engines	86,000–86,019 mm
Hole deviations:
- 1.6-liter engine	0,25; 0,50; 0.75 and 1.0 mm
- other engines	0.25 and 0.50 mm
Max bore wear	0.15 mm
Max, tapering or ovality	0.02 mm
Piston working clearance	0.036-0.075 mm
Place for measuring piston diameter	18.0 mm inside ring groove in right corner for piston pins