Mazda 2006-2008 RX7 Engine - Page 58

TECHNICAL DATA
01–50–2
End Of Sie
Minimum / maximum bore diameter limit 87.440—87.590 mm {3.4425—3.4484 in}
Oil jet valve air pressure
216—274 kPa {2.2—2.7 kgf·cm
2
31.4—39.7 psi}
Piston diameter (Standard) 87.465—87.495 mm {3.4435—3.4446 in}
Piston-to-cylinder clearance (Standard) 0.025—0.045 mm {0.0010—0.0017 in}
Piston-to-cylinder clearance (Maximum) 0.11 mm {0.0043 in}
Piston ring-to-ring groove clearance (Standard)
Top: 0.03—0.08 mm {0.0012—0.0031 in}
Second: 0.03—0.07 mm {0.0012—0.0027 in}
Oil: 0.03—0.07 mm {0.0012—0.0027 in}
Piston ring-to-ring groove clearance (Maximum)
Top: 0.17 mm {0.0067 in}
Second, Oil: 0.15 mm {0.0059 in}
Piston end gap (Standard)
Top: 0.16—0.31 mm {0.0063—0.0122 in}
Second: 0.33—0.48 mm {0.0130—0.0189 in}
Oil (rail): 0.20—0.70 mm {0.0079—0.0275 in}
Piston end gap (Maximum) 1.0 mm {0.0393 in}
Crankshaft end play (Standard) 0.22—0.45 mm {0.0087—0.0177 in}
Crankshaft end play (Maximum) 0.55 mm {0.0216 in}
Crankshaft runout (Maximum) 0.05 mm {0.0019 in}
Main journal bearing size
STD: 51.980—52.000 mm {2.0464—2.0472 in}
US0.25: 51.730—51.750 mm {2.0366—2.0373 in}
Main journal out of round (Maximum) 0.05 mm {0.0019 in}
Crank pin journal diameter [LF]
STD: 46.980—47.000 mm {1.8497—1.8503 in}
US0.25: 46.730—46.750 mm {1.8398—1.8405 in}
Crank pin journal diameter [L3]
STD: 49.980—50.000 mm {1.9677—1.9685 in}
US0.25: 49.730—49.750 mm {1.9579—1.9586 in}
Crank pin out of round (Maximum) 0.05 mm {0.0019 in}
Main journal oil clearance (Standard) 0.019—0.035 mm {0.0007—0.0013 in}
Main journal oil clearance (Maximum) 0.10 mm {0.0039 in}
Main bearing size
STD: 2.506—2.509 mm {0.0987—0.0988 in}
OS0.25: 2.628—2.634 mm {0.1034—0.1037 in}
Connecting rod side clearance (Standard) 0.14—0.36 mm {0.0056—0.0141 in}
Connecting rod side clearance (Maximum) 0.435 mm {0.0172 in}
Connecting rod bearing oil clearance (Standard) 0.026—0.052 mm {0.0011—0.0020 in}
Connecting rod bearing oil clearance (Maximum) 0.1 mm {0.0039 in}
Connecting rod bearing size [LF]
STD: 1.498—1.504 mm {0.0589—0.0592 in}
OS0.25: 1.623—1.629 mm {0.0639—0.0641 in}
Connecting rod bearing size [L3]
STD: 1.496—1.502 mm {0.0589—0.0591 in}
OS0.25: 1.621—1.627 mm {0.0639—0.0641 in}
Bolt length (mm {in})
Cylinder head bolt (With washer)
Standard: 149.2—149.8 {5.87—5.90}
Maximum: 150.5 {5.91}
Cylinder head bolt (Without washer)
Standard: 145.2—145.8 {5.72—5.74}
Maximum: 146.5 {5.77}
Connecting rod bolt
Standard: 44.7—45.3 {1.75—1.78}
Maximum: 46.0 {1.81}
Main bearing cap bolt (Plastic region tightening bolt only)
Standard: 110.0—110.6 {4.33—4.35}
Maximum: 111.3 {4.38}
Valve clearance [Engine cold]
IN: 0.22—0.28 mm {0.0087—0.0110 in}
EX: 0.27—0.33 mm {0.0106—0.0130 in}
Value range 0.005—0.101 mm {0.00019—0.0039 in}
Item Specification