Type

Bosch® FLR-9LTE, GM P/N 90541059

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Gap

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0.9-1.1

0.035-0.043

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Torque

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25

19

Engine at Idle (At Normal Operating Temperature)

150

21.7

(8)

85.975-85.985

3.3848-3.3852

(99)

85.985-85.995

3.3852-3.3856

(00)

85.995-86.005

3.3856-3.3860

(01)

86.005-86.015

3.3860-3.3864

(02)

86.015-86.025

3.3864-3.3868

(7 + 0.5) OVERSIZE

86.465-86.475

3.4041-3.4045

Maximum Out-of-Round

0.065

0.0026

Taper

0.0065

0.0003

(8)

85.940-85.950

3.3834-3.3838

(99)

85.950-85.960

3.3838-3.3842

(00)

85.960-85.970

3.3842-3.3846

(01)

85.970-85.980

3.3846-3.3850

(02)

85.980-85.990

3.3850-3.3854

(7 + 0.5) OVERSIZE

86.430-86.440

3.4027-3.4031

Piston Bore Clearance

0.025-0.045

0.0010-0.0018

Compression Rings

Thickness

1.5

0.0590

Ring Groove Clearance

0.02-0.04

0.0008-0.0015

Ring Gap

0.30-0.50

0.0118-0.0196

Oil Ring

Thickness

3.0

0.1181

Ring Groove Clearance

0.01-0.03

0.0004-0.0012

Ring Gap

0.40-1.40

0.0157-0.0551

Diameter

21

0.8267

Clearance in Piston

0.003-0.008

0.0001-0.0003

Main Journal Diameter (color coded size designation)

Standard Size (green)

67.980-67.988

2.6763-2.6766

Standard Size (brown)

67.988-67.996

2.6766-2.6770

Undersize -- 0.25 (green/blue)

67.730-67.738

2.6665-2.6668

Undersize -- 0.25 (brown/blue)

67.738-67.746

2.6668-2.6671

Undersize -- 0.50 (green/white)

67.480-67.488

2.6566-2.6570

Undersize -- 0.50 (brown/white)

67.488-67.496

2.6570-2.6573

Main Journal Maximum Out-of-Round

0.03

0.0012

Crankshaft Bearing Clearance

0.014-0.043

0.0006-0.0017

Crankshaft End Play

0.010-0.76

0.0004-0.0300

Connecting Rod Journal Diameter

48.971-48.987

1.927-1.928

Undersize 0.25

48.721-48.737

1.918-1.919

Undersize 0.50

48.471-48.487

1.908-1.909

Side Clearance

0.07-0.28

0.0027-0.0110

Bearing Clearance

0.013-0.061

0.0005-0.0024

Big End Diameter

52.000-52.012

2.0472-2.0477

Lift

10.0

0.3937

Journal Diameter

27.939-27.960

1.099-1.101

Bearing clearance

0.038-0.051

0.0015-0.0020

End Play

0.04-0.144

0.0016-0.0057

Lifter

Hydraulic

Face Angle

45° 20'

Seat Angle

45°

Seat Width

Intake

1.0-1.4

0.0394-0.0551

Exhaust

1.4-1.8

0.0551-0.0709

Valve Length (Production)

Intake

102

4.016

Exhaust

92

3.622

Valve Length (Service)

Intake

101.7

4.0039

Exhaust

91.8

3.6141

Valve Stem Diameter

Standard (K) Intake

5.955-5.970

0.2344-0.2350

Standard (K) Exhaust

5.945-5.960

0.2341-0.2346

Oversize (K 1 - 0.075) Intake

6.030

0.2374

Oversize (K 1 - 0.075) Exhaust

6.020

0.2370

Valve Guide Diameter

Standard (K)

6.000-6.012

0.2362-0.2367

Oversize (K 1 - 0.075)

6.075-6.090

0.2392-0.2398

Stem Clearance

Intake

0.030-0.057

0.0012-0.0022

Exhaust

0.040-0.067

0.0016-0.0026

Valve Spring Height

Intake (Installed)

39.2

1.543

Exhaust (Installed)

39.2

1.543

Intake and Exhaust Compressed at 252 N·m (56.6 lb)

34

1.338

Total Height

134.0

5.276

Maximum Distortion (length)

0.05/100

0.0020/3.937