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Home >> Porsche >> 2016 >> Cayman GTS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 223 (13 - Engine - CRANKGEAR, Pistons -- 92A Cayenne) >> WM 131003 Measuring Pistons (Includes Measuring Cylinder Bore) [Except Cayenne S E-Hybrid & Cayenne (3.0)] >> Information >> Component Overview Of Pistons And Connecting Rods

Component Overview Of Pistons And Connecting Rods

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Fig 1: Overview Of Piston
G09932032Courtesy of PORSCHE CARS NORTH AMERICA, INC.
No. Designation Qty. Removal Installation
-1-  Connecting-Rod Bearing Screws 2   Replace
Oil Thread And Contact Surface
Tighten To 30 Nm (22 Ft. Lb.) For Measuring Radial Play, But Do Not Turn Any Further
Measure Radial Play
-2-  Connecting Rod Bearing Cap 1 Do Not Confuse
Mark Allocation To Cylinder -B-  .
Check Installation Position Of Welded Marking -A-  .
-3-  Bearing Shells 2 Per Piston Check Installation Position! Upper Bearing Shell (Towards The Piston) Is Made Of Wear-Resistant Material. New Bearing Shell Is Identified By A Black Line.
Replace Worn Bearing Shells!
Tighten To 30 Nm (22 Ft. Lb.) For Measuring Radial Play, But Do Not Turn Any Further
-4-  Connecting Rod 1 Mark Allocation To Cylinder -B-  . Only replace in sets
Check Installation Position Of Welded Marking -A-  .
Axial Play For Each Con-Rod Pair, New: 0.20....0.44 Mm
-5-  Circlip 2 Per Piston    
-6-  Piston Pin 1 Heat Stiff Pistons To Approx. 60°C
Remove With A Mandrel
Install With A Mandrel
-7-  Pistons 1 With Combustion Chamber
Mark Installation Position And Allocation To Cylinder
Check
Replace If Piston Shank Is Cracked
Install With Piston-Ring Restraining Strap
Check Piston And Cylinder Dimensions
Check Condition Of Piston In TDC Position
Check Cylinder Bore
-8-  Piston Rings 3 Per Piston Remove Using Piston-Ring Pliers Offset Gap By 120°
Install Using Piston-Ring Pliers
"TOP" Marking Must Be Facing The Piston Crown
Check End Clearance
Check Vertical Clearance