Diesel engine (Mazda Capella GD)

Cylinder head

Cylinder head height	133.9-134.1 mm
Permissible warpage of the cylinder head surface	0.10 mm max.
Permissible warping of the nozzle surface	0.10 mm
Max, cylinder head surface finishing	not allowed
Valve seat angle	45°

Valve disc diameter:
— intake valves	40.9-41.1 mm
- exhaust valves	35.9-36.1 mm
Valve length:
— intake valves	106.9 mm
- exhaust valves	106.8 mm
Valve stem diameter:
— intake valves	7,970-7,985 mm
- exhaust valves	7,965-7,980 mm
Operating clearance of valve stems in guides:
— intake valves	0.040-0.075 mm
- exhaust valves	0.045-0.080 mm
Max. working clearance of valve stems in guides	0.10 mm
Valve plate rib thickness:
— inlet and outlet valves	0.8 mm

Inner diameter	8.025-8.045 mm
Cylinder head installation temperature	80—100°C
Installation size of guides	8.3-8.8 mm

Free length:
— inlet and outlet valves	45.11 mm (minimum length 44.8 mm)
Permissible warping on the upper side	1.6 mm
Installation length, all valves	39.0 mm at 28.0 kg

Valve seat angle	45°
Valve seat width	1.7-2.3 mm
Valve seat depth	0.75-1.05 below the cylinder head surface
— max depth	2.55 mm

Axial clearance of the camshaft	0.02-0.15 mm
— max axial clearance	0.20 mm
Max camshaft bend	0.10 mm
Camshaft bearing clearance	0.025-0.066 mm
- wear limit	0.10 mm
Bearing journal diameter	31.959-31.975 mm
— wear limit less than	0.05 mm
Height of projections:
— intake valves	43.90 mm, wear limit
- exhaust valves	44.90 mm, wear limit

Outer diameter	34.95-34.97 mm
Diameter of holes	34.99-35.01 mm
Working clearance of tappets	0.020-0.06 mm
- wear limit	0.10 mm

Piston rings	2 piston rings, 1 three-piece oil scraper piston ring
Piston pins	clearance fit in connecting rods
Piston diameter	95.957-85.983 mm
— permissible deviation	0.25 and 0.50 mm
Piston working clearance:
— nominal size	0.032-0.050 mm
- wear limit	0.15 mm
Piston ring rod clearances:
- upper ring	0.20-0.40 mm
- middle ring	0.20-0.40 mm
- oil scraper piston ring	0.20-0.40 mm
- wear limit	1.00 mm
Maximum clearance in piston grooves:
- upper ring	0.050-0.090 mm
- middle ring	0.040-0.080 mm
- wear limit	0.20 mm
Piston ring thickness:
- upper ring	1.97-1.99 mm
- the second ring	1.97-1.97 mm
Permissible deviations for piston rings	as for pistons

Diameter	24.997-25.007 mm
Clearance in connecting rods	0.05 mm max.
Length from center to center	151.95-152.05 mm
Connecting rod head hole	25.014-25.030 mm
Allowable twisting or bending	0.08 mm per 50 mm of length
Axial clearance on the crankshaft journals	0.11-1.26 mm
- wear limit	0.70 mm
Operating clearance in connecting rod bearings	0.027-0.055 mm
- wear limit	0.08 mm
Permissible deviations of bearing liners	0,25; 0.50 and 0.75 mm

Number of main stitches	5
Perception of axial pressure	through the flanged bearing bushings to the middle bearing
Main/connecting rod bearing design	thin-walled bearing shells
Crankshaft axial clearance	0.04-0.28 mm
- wear limit	0.30 mm
Radial (working) clearance of the main bearing:
— nominal clearance	0.031-0.050 mm
- wear limit	0.08 mm
Radial (working) clearance of the connecting rod bearing:
— nominal clearance	0.027-0.055 mm
- wear limit	0.08 mm
Main bearing journal diameter:
— nominal diameter	59.937-59.955 mm
- wear limit	59.89 mm
— finishing boundary	0.75 mm
Max, constriction or quality	0.05 mm
Max crankshaft bending	0.05 mm
Permissible deviations of bearing liners	0,25; 0.50 and 0.75 mm
Crankshaft journal diameter:
— nominal diameter	50.940-50.955 mm
- wear limit	50.89 mm
Polishing border	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

[Based on website data: MazBook]

Cylinder block height	301.5 mm
Max. sealing surface warpage	0.10 mm
Cylinder bore	86,000-86,022 mm
Orifice deviation	0.25 and 0.50 mm
Max bore wear	0.15 mm
Max, tapering or ovality	0.022 mm
Piston working clearance	0.03-0.050 mm
Place of measurement of piston diameter	19.0 mm above the lower edge of the piston in the right corner in relation to the piston pins