LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2012 >> IS 250 Base, RWD, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (Service Specifications) >> 4GR-FSE Engine Mechanical >> Service Data >> Service Data
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Service Data

ENGINE

Ignition timing Terminals TC and CG of DLC3 connected 8 to 12°BTDC at idle (Transmission in neutral)
Terminals TC and CG of DLC3 disconnected 5 to 15°BTDC at idle (Transmission in neutral)
Idle speed 650 to 750 RPM (Transmission in neutral)
Compression Compression pressure 1.4 MPa (14 kgf*cm2 , 199 psi)
Minimum pressure 0.98 MPa (10 kgf*cm2 , 142 psi)
Difference between each cylinder 0.1 MPa (1.0 kgf*cm2 , 15 psi) or less
ENGINE UNIT

Cylinder head set bolt Standard 10.85 to 11.00 mm (0.4272 to 0.4331 in.)
Minimum 10.7 mm (0.4213 in.)
Measuring point 100 mm (3.94 in.)
Chain Elongation Minimum 136.9 mm (5.390 in.)
No. 2 chain Elongation Minimum 137.6 mm (5.417 in.)
Crankshaft timing gear or sprocket Diameter (w/Chain) Minimum 61.4 mm (2.417 in.)
Idle sprocket Diameter (w/Chain) Minimum 61.4 mm (2.417 in.)
Idle gear shaft Idle gear shaft diameter 22.987 to 23.000 mm (0.9050 to 0.9055 in.)
Idle gear inside diameter 23.020 to 23.030 mm (0.9063 to 0.9067 in.)
Oil clearance Standard 0.020 to 0.043 mm (0.0008 to 0.0017 in.)
Maximum 0.093 mm (0.0037in.)
No. 2 chain tensioner assembly Worn depth Maximum 0.9 mm (0.035 in.)
No. 3 chain tensioner assembly Worn depth Maximum 0.9 mm (0.035 in.)
Chain tensioner slipper Worn depth Maximum 1.0 mm (0.039 in.)
No. 1 chain vibration damper Worn depth Maximum 1.0 mm (0.039 in.)
No. 2 chain vibration damper Worn depth Maximum 1.0 mm (0.039 in.)
Cylinder head sub-assembly Standard Cylinder head lower 0.05 mm (0.0020 in.)
Intake 0.08 mm (0.0031 in.)
Exhaust 0.08 mm (0.0031 in.)
Warpage Maximum 0.10 mm (0.0039 in.)
Intake valve Valve stem diameter 5.470 to 5.485 mm (0.2154 to 0.2159 in.)
Margin thickness Standard 1.0 mm (0.03937 in.)
Maximum 0.5 mm (0.0197 in.)
Overall length Standard 106.15 mm (4.1791 in.)
Maximum 105.65 mm (4.1594 in.)
Exhaust valve Valve stem diameter 5.465 to 5.480 mm (0.2151 to 0.2157 in.)
Margin thickness Standard 0.81 mm (0.0319 in.)
Maximum 0.31 mm (00.122 in.)
Overall length Standard 111.70 mm (4.3976 in.)
Maximum 111.20 mm (4.3779 in.)
Inner compression spring Free length 57.46 mm (2.2622 in.)
Deviation Maximum 1.0 mm (0.039 in.)
Angle (reference) Maximum 2°
Intake valve guide bush Inside diameter 5.510 to 5.530 mm (0.2169 to 0.2177 in.)
Oil clearance Standard 0.030 to 0.060 mm (0.0012 to 0.0024 in.)
Maximum 0.08 mm (0.0032 in.)
Bush bore diameter Use STD 10.285 to 10.306 (0.4049 to 0.4057 in.)
Use O/S 0.05 10.335 to 10.356 mm (0.4069 to 0.4077 in.)
Protrusion height 10.20 to 10.24 mm (0.4016 to 0.4031 in.)
Exhaust valve guide bush Inside diameter 5.510 to 5.530 mm (0.2169 to 0.2177 in.)
Oil clearance Standard 0.025 to 0.065 mm (0.0010 to 0.0026 in.)
Maximum 0.01 mm (0.00039 in.)
Bush bore diameter Use STD 10.285 to 10.306 mm (0.4049 to 0.4057 in.)
Use O/S 0.05 10.335 to 10.356 mm (0.4069 to 0.4077 in.)
Protrusion height 9.30 to 9.34mm (0.3661 to 0.3677 in.)
No. 1 camshaft (Intake) Journal diameter No. 1 journal 35.946 to 35.960 mm (1.4152 to 1.4157 in.)
Other journals 25.959 to 25.975 mm (1.0220 to 1.0226 in.)
Circuit runout Maximum 0.04 mm (0.0016 in.)
Cam lobe height Standard 43.940 to 44.040 mm (1.7299 to 1.7339 in.)
Maximum 43.790 mm (1.7240 in.)
Oil clearance Standard No. 1 journal 0.031 to 0.078 mm (0.0012 to 0.0031 in.)
Other journals 0.025 to 0.062 (0.00098 to 0.0024 in.)
Maximum No. 1 journal 0.10 mm (0.0039 in.)
Other journals 0.09 mm (0.0035 in.)
Thrust clearance Standard 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
Maximum 0.15 mm (0.006 in.)
No. 2 camshaft (Exhaust) Journal diameter No. 1 journal 35.946 to 35.960 mm (1.4152 to 1.4157 in.)
Other journals 25.959 to 25.975 mm (1.0220 to 1.0226 in.)
Circuit runout Maximum 0.04 mm (0.0016 in.)
Cam lobe height Standard 44.090 to 44.190 mm (1.7358 to 1.7398 in.)
Maximum 43.940 mm (1.7299 in.)
Oil clearance Standard No. 1 journal 0.031 to 0.078 mm (0.0012 to 0.0031 in.)
Other journals 0.025 to 0.062 (0.00098 to 0.0024 in.)
Maximum No. 1 journal 0.10 mm (0.0039 in.)
Other journals 0.09 mm (0.0035 in.)
Thrust clearance Standard 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
Maximum 0.15 mm (0.006 in.)
No. 3 camshaft (Intake) Journal diameter No. 1 journal 35.946 to 35.960 mm (1.4152 to 1.4157 in.)
Other journals 25.959 to 25.975 mm (1.0220 to 1.0226 in.)
Circuit runout Maximum 0.04 mm (0.0016 in.)
Cam lobe height Standard 43.940 to 44.040 mm (1.7299 to 1.7339 in.)
Maximum 43.790 mm (1.7240 in.)
Oil clearance Standard No. 1 journal 0.031 to 0.078 mm (0.0012 to 0.0031 in.)
Other journals 0.025 to 0.062 (0.00098 to 0.0024 in.)
Maximum No. 1 journal 0.10 mm (0.0039 in.)
Other journals 0.09 mm (0.0035 in.)
Thrust clearance Standard 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
Maximum 0.15 mm (0.006 in.)
No. 4 camshaft (Exhaust) Journal diameter No. 1 journal 35.946 to 35.960 mm (1.4152 to 1.4157 in.)
Other journals 25.959 to 25.975 mm (1.0220 to 1.0226 in.)
Circuit runout Maximum 0.04 mm (0.0016 in.)
Cam lobe height Standard 44.090 to 44.190 mm (1.7358 to 1.7398 in.)
Maximum 43.940 mm (1.7299 in.)
Oil clearance Standard No. 1 journal 0.031 to 0.078 mm (0.0012 to 0.0031 in.)
Other journals 0.025 to 0.062 (0.00098 to 0.0024 in.)
Maximum No. 1 journal 0.10 mm (0.0039 in.)
Other journals 0.09 mm (0.0035 in.)
Thrust clearance Standard 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
Maximum 0.15 mm (0.006 in.)
Ring pin for cylinder head sub-assembly Protrusion height 2.5 to 3.8 mm (0.098 to 0.150 in.)
Straight pin for cylinder head sub-assembly Protrusion height 17.5 to 19.5 mm (0.689 to 0.768 in.)
Connecting rod thrust clearance Standard 0.25 to 0.40 mm (0.0098 to 0.0157 in.)
Maximum 0.50 mm (0.020 in.)
Connecting rod oil clearance Standard 0.042 to 0.068 mm (0.0017 to 0.0027 in.)
Maximum 0.070 mm (0.0028 in.)
Connecting rod diameter Mark1 51.000 to 51.006 mm (2.0079 to 2.0081 in.)
Mark2 51.007 to 51.012 mm (2.0081 to 2.0083 in.)
Mark3 51.013 to 51.018 mm (2.0084 to 2.0086 in)
Mark4 51.019 to 51.024 mm (2.0086 to 2.0088 in.)
Connecting rod beating center wall thickness Mark1 1.484 to 1.487 mm (0.0584 to 0.0585 in.)
Mark2 1.487 to 1.490 mm (0.0585 to 0.0587 in.)
Mark3 1.490 to 1.493 mm (0.0587 to 0.0588 in)
Mark4 1.493 to 1.496 mm (0.0588 to 0.0589 in.)
Crankshaft thrust clearance Standard 0.040 to 0.240 mm (0.00158 to 0.00944 in.)
Maximum 0.30 mm (0.0118 in.)
Thrust washer thickness 2.43 to 2.48 mm (0.0957 to 0.0976 in.)
Cylinder block warpage Maximum 0.07 mm (0.0028 in.)
Cylinder bore diameter Standard 83.000 to 83.012 mm (3.2677 to 3.2682 in.)
Maximum 83.200 mm (3.2756 in.)
Piston diameter Distance 14.3 mm (0.563 in.)
Standard 82.966 to 82.996 mm (3.2664 to 3.2676 in.)
Minimum 82.836 mm (3.2613 in.)
Piston oil clearance Standard 0.014 to 0.036 mm (0.0006 to 0.0014 in.)
Maximum 0.09 mm (0.0035 in.)
Connecting rod out-of alignment Maximum 0.05 mm (0.0020 in.) per 100 mm (3.94 in.)
Connecting rod twist Maximum 0.15 mm (0.0059 in.) per 100 mm (3.94 in.)
Piston pin hole inside diameter Mark A 21.998 to 22.001 mm (0.8661 to 0.8662 in.)
Mark B 22.001 to 22.004 mm (0.8662 to 0.8663 in.)
Mark C 22.004 to 22.007 mm (0.8663 to 0.8664 in.)
Piston pin diameter Mark A 21.997 to 22.000 mm (0.8660 to 0.8661 in.)
Mark B 22.000 to 22.003 mm (0.8661 to 0.8663 in.)
Mark C 22.003 to 22.006 mm (0.8663 to 0.8664 in.)
Piston pin oil clearance Standard -0.002 to 0.004 mm (-0.00007 to 0.0001 in.)
Maximum 0.015 mm (0.0006 in.)
Connecting rod bushing inside diameter Mark A 22.005 to 22.008 mm (0.8663 to 0.8665 in.)
Mark B 22.009 to 22.011 mm (0.8665 to 0.8666 in.)
Mark C 22.011 to 22.014 mm (0.8666 to 0.8667 in.)
Connecting rod bushing oil clearance Standard 0.005 to 0.011 mm (0.0002 to 0.0004 in.)
Maximum 0.03 mm (0.0012 in.)
Piston ring groove clearance No. 1 0.040 to 0.080 mm (0.0016 to 0.0031 in.)
No. 2 0.030 to 0.070 mm (0.0012 to 0.0028 in.)
Oil 0.020 to 0.065 mm (0.0008 to 0.0026 in.)
Piston ring end gap Standard No. 1 0.28 to 0.38 mm (0.0110 to 0.0150 in.)
No. 2 0.35 to 0.45 mm (0.0138 to 0.0178 in.)
Oil (Side rail) 0.13 to 0.38 mm (0.0051 to 0.0150 in.)
Maximum No. 1 0.50 mm (0.0197 in.)
No. 2 0.80 mm (0.0315 in.)
Oil (Side rail) 0.65 mm (0.0256 in.)
Connecting rod bolt diameter Standard 7.2 to 7.3 mm (0.284 to 0.287 in.)
Minimum 7.0 mm (0.276 in.)
Crankshaft bearing cap set bolt diameter Standard 10.8 to 11.0 mm (0.4252 to 0.4331 in.)
Minimum 10.7 mm (0.4213 in.)
Measuring point 47 mm (1.85 in.)
Crankshaft circle runout Maximum 0.06 mm (0.0024 in.)
Main journal diameter 60.988 to 61.000 mm (2.4011 to 2.4016 in.)
Main journal taper and out-of -round Maximum 0.02 mm (0.0008 in.)
Crankshaft pin diameter 47.992 to 48.000 mm (1.8894 to 1.8898 in.)
Crank pin taper and out-of-round Maximum 0.02 mm (0.0008 in.)
Crankshaft oil clearance Standard 0.026 to 0.047 mm (0.0010 to 0.0019 in.)
Minimum 0.050 mm (0.0020 in.)
Standard upper bearing center wall thickness (No. 1 and No. 4 journal) Mark 1 2.500 to 2.503 mm (0.0984 to 0.0985 in.)
Mark 2 2.503 to 2.506 mm (0.0985 to 0.0987 in.)
Mark 3 2.506 to 2.509 mm (0.0987 to 0.0988 in.)
Mark 4 2.509 to 2.512 mm (0.0988 to 0.0989 in.)
Mark 5 2.512 to 2.515 mm (0.0989 to 0.0990 in.)
Standard lower bearing center wall thickness (No. 1 and No. 4 journal) Mark 1 2.478 to 2.481 mm (0.0976 to 0.0977 in.)
Mark 2 2.481 to 2.484 mm (0.0977 to 0.0978 in.)
Mark 3 2.484 to 2.487 mm (0.0978 to 0.0979 in.)
Mark 4 2.487 to 2.490 mm (0.0979 to 0.0980 in.)
Mark 5 2.490 to 2.493 mm (0.0980 to 0.0981 in.)
Standard upper bearing center wall thickness (No. 2 and No. 3 journal) Mark 1 2.478 to 2.481 mm (0.0976 to 0.0977 in.)
Mark 2 2.481 to 2.484 mm (0.0977 to 0.0978 in.)
Mark 3 2.484 to 2.487 mm (0.0978 to 0.0979 in.)
Mark 4 2.487 to 2.490 mm (0.0979 to 0.0980 in.)
Mark 5 2.490 to 2.493 mm (0.0980 to 0.0981 in.)
Standard lower bearing center wall thickness (No. 2 and No. 3 journal) Mark 1 2.500 to 2.503 mm (0.0984 to 0.0985 in.)
Mark 2 2.503 to 2.506 mm (0.0985 to 0.0987 in.)
Mark 3 2.506 to 2.509 mm (0.0987 to 0.0988 in.)
Mark 4 2.509 to 2.512 mm (0.0988 to 0.0989 in.)
Mark 5 2.512 to 2.515 mm (0.0989 to 0.0990 in.)
Straight pin for cylinder block sub-assembly Protrusion height Pin A 23 mm (0.906 in.)
Pin B 6 mm (0.236 in.)
Pin C 11 mm (0.433 in.)
Pin D 9 mm (0.354 in.)
Tight plug for cylinder block Depth 0.2 to 1.2 mm (0.007 to 0.047 in.)
scientia non olet · About LEMON Manuals