Conrod weight classes

The con-rods are allocated to weight classes. The last digit of the part number indicates the weight class. The last digit is marked on the shaft of con-rods supplied as spare parts.

Note

The weight difference between con-rods installed in the same engine must not exceed 6 g. To determine the weight class, weigh the entire con-rod without the bearing shells.

The con-rod markings for spare parts are stamped with paint.

Type 1 and 2 con-rods are no longer available as spare parts.

If con-rods need to be replaced, a complete set of type 3 con-rods must be installed.

Note

Type 3 con-rods are also available as individual parts.

Type 1 (from the start of 993 production)

Type 1 (from the start of 993 production)

993.103.020.50

514 520 526 532 538 544 550

993.103.020.50

993.103.020.51

993.103.020.52

993.103.020.53

993.103.020.54

993.103.020.55

993.103.020.56

Type 2

From engine no,

M64/05 63 S 02522 - 05847 / M64/06 63 S 51344 - 52684 / M64/07 64 S 02413 - 04238 / M64/08 64 S 50791 - 51180

Weight

(grams) (grams) 524 530 536 542

542 548

548 554

Weight group for spare part

of replacement con-rod

993.103.020.57

993.103.020.58

993.103.020.59

993.103.020.60

993.103.020.61

993.103.020.62

Code con-rod

60 61 62

Type 3

From engine no. M64/05 63 S 05848 / M64/06 63 S 52685 / M64/07 64 S 04238 /

M64/08 64 S 51181 / M64/20 63 S 85654 / M64/60 61 T 00932

Weight (grams) (grams)

546 552 558 564 570

Weight group for spare part

Part no.

of replacement con-rod

993.103.020.64

993.103.020.65

993.103.020.66

993.103.020.67

993.103.020.68

993.103.020.69

Code con-rod

68 69

Carrera (993)

Engine, Crankshaft, Pistons

37 D ma itli ig nd ssm ra kshaft

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