Mazda MX-5 NA silhouetteMX-5 NA

TECHNICAL DATA

TD-3spec table

Engine — B6 DOHC (continued)

Seat contact width
mm (in)
B6 DOHC0.8—1.4 (0.031—0.055)
Seat sinking
Standard
mm (in)
B6 DOHC43.5 (1.713)
Seat sinking
Maximum
mm (in)
B6 DOHC45.0 (1.772)
Valve spring — Free length
IN — Standard
mm (in)
B6 DOHC48.0 (1.890)
Valve spring — Free length
IN — Minimum
mm (in)
B6 DOHC47.0 (1.850)
Valve spring — Free length
EX — Standard
mm (in)
B6 DOHC48.3 (1.902)
Valve spring — Free length
EX — Minimum
mm (in)
B6 DOHC47.3 (1.862)
Valve spring — Out-of-square
IN
mm (in)
B6 DOHC1.68 (0.0661) max.
Valve spring — Out-of-square
EX
mm (in)
B6 DOHC1.69 (0.0665) max.
Valve spring — Setting load/height
IN
N (kg, lb)/mm (in)
B6 DOHC217—246 (22.1—25.1, 48.6—55.2)/40.0 (1.575)
Valve spring — Setting load/height
EX
N (kg, lb)/mm (in)
B6 DOHC174—196 (17.7—20.0, 38.9—44.0)/40.0 (1.575)
Camshaft — Cam height
IN — Standard
mm (in)
B6 DOHC40.888 (1.6098)
Camshaft — Cam height
IN — Minimum
mm (in)
B6 DOHC40.688 (1.6019)
Camshaft — Cam height
EX — Standard
mm (in)
B6 DOHC40.889 (1.6098)
Camshaft — Cam height
EX — Minimum
mm (in)
B6 DOHC40.689 (1.6019)
Camshaft — Journal diameter
(No.1—No.5)
mm (in)
B6 DOHC25.940—25.965 (1.0213—1.0222)
Camshaft — Out-of-round
B6 DOHC0.05 (0.002) max.
Camshaft bearing oil clearance
Standard (No.1—No.5)
mm (in)
B6 DOHC0.035—0.081 (0.0014—0.0032)
Camshaft bearing oil clearance
Maximum
mm (in)
B6 DOHC0.15 (0.006)
Camshaft runout
mm (in)
B6 DOHC0.03 (0.0012) max.
Camshaft end play
Standard
mm (in)
B6 DOHC0.07—0.19 (0.0028—0.0075)
Camshaft end play
Maximum
mm (in)
B6 DOHC0.20 (0.008)
Cylinder block — Height
mm (in)
B6 DOHC221.5 (8.720)
Cylinder block — Distortion
mm (in)
B6 DOHC0.15 (0.006) max.
Cylinder block — Grinding
mm (in)
B6 DOHC0.20 (0.008) max.
Cylinder bore diameter
Standard size
mm (in)
B6 DOHC78.006—78.013 (3.0711—3.0714)
Cylinder bore diameter
0.25 (0.010) oversize
mm (in)
B6 DOHC78.256—78.263 (3.0809—3.0812)
Cylinder bore diameter
0.50 (0.020) oversize
mm (in)
B6 DOHC78.506—78.513 (3.0908—3.0911)
Cylinder bore taper and out-of-round
mm (in)
B6 DOHC0.019 (0.0007) max.
Piston — Piston diameter (Measured at 90° to pin bore axis and 16.5mm (0.650 in) below oil ring groove)
Standard size
mm (in)
B6 DOHC77.954—77.974 (3.0690—3.0698)
Piston — Piston diameter
0.25 (0.010) oversize
mm (in)
B6 DOHC78.211—78.212 (3.0792—3.0794)
Piston — Piston diameter
0.50 (0.020) oversize
mm (in)
B6 DOHC78.461—78.467 (3.0890—3.0892)
Piston — Piston-to-cylinder clearance
Standard
mm (in)
B6 DOHC0.039—0.052 (0.0015—0.0020)
Piston — Piston-to-cylinder clearance
Maximum
mm (in)
B6 DOHC0.15 (0.006)
Piston ring — Thickness
Top
mm (in)
B6 DOHC1.47—1.49 (0.0579—0.0587)
Piston ring — Thickness
Second
mm (in)
B6 DOHC1.47—1.49 (0.0579—0.0587)
Piston ring — End gap (Measured in cylinder)
Top
mm (in)
B6 DOHC0.15—0.30 (0.006—0.012)
Piston ring — End gap
Second
mm (in)
B6 DOHC0.15—0.30 (0.006—0.012)
Piston ring — End gap
Oil (rail)
mm (in)
B6 DOHC0.20—0.70 (0.008—0.028)
Piston ring — End gap
Maximum
mm (in)
B6 DOHC1.0 (0.039)
Piston ring — Ring groove width in piston
Top
mm (in)
B6 DOHC1.52—1.54 (0.0598—0.0606)
Piston ring — Ring groove width in piston
Second
mm (in)
B6 DOHC1.52—1.54 (0.0598—0.0606)
Piston ring — Ring groove width in piston
Oil
mm (in)
B6 DOHC4.02—4.04 (0.1583—0.1591)
Piston ring — Piston ring-to-ring groove clearance
Top
mm (in)
B6 DOHC0.03—0.07 (0.0012—0.0028)
Piston ring — Piston ring-to-ring groove clearance
Second
mm (in)
B6 DOHC0.03—0.07 (0.0012—0.0028)
Piston ring — Piston ring-to-ring groove clearance
Maximum
mm (in)
B6 DOHC0.15 (0.006)
Piston pin — Diameter
mm (in)
B6 DOHC19.987—19.993 (0.7869—0.7871)
Piston pin — Piston-to-piston pin clearance
mm (in)
B6 DOHC−0.005—−0.013 (−0.0002—−0.0005)
Piston pin — Connecting rod bush-to-piston pin clearance
mm (in)
B6 DOHC0.010—0.027 (0.0004—0.0011)

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