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Cylinders, pistons

Cylinders, pistons



1. Cylinder bore reference marking

2. Cylinder bore

3. 3-piece (steel), 2 scraper rings, 1 expander

4. Minute and double trapezoid rings

5. Square ring

6. Piston diameter


Engine Z 18 XE
Ø Cylinder bore
Normal dimension
reference 99, mm 80,485 - 80,495
reference 00, mm 80,495 - 80,505
reference 01, mm 80,505 - 80,515
Reference 05, mm 80,545 - 80,555
Oversize
Reference 00 + 0.5, mm 80,995 - 81,005
reference 7 + 0.5, mm
Ø Piston
Normal dimension
reference 99, mm 80,455 - 80,465
reference 00, mm 80,465 - 80,475
reference 01, mm 80,475 - 80,485
Reference 05, mm 80,515 - 80,525
Oversize
Reference 00 + 0.5, mm 80,965 - 80,975


Engine Z 18 XE
Piston rings
Square ring
Height, mm 1,20
Ring gap, mm 0,30 - 0,50
Height clearance, mm 0,03 - 0,05
Hook ring
Height, mm 1,20
Ring gap, mm 0,30 - 0,50
Height clearance, mm 0,02 - 0,04
Oil scraper ring
Height, mm 2,0
Ring gap, mm 0,40 - 1,40
Height clearance, mm 0,01 - 0,03
Ring gap offset 120°


Engine Z18 XE
Piston pin
Length, mm 57
Diameter, mm 17,997 - 18,000
storing shrink-fitted in the connecting rod
Play
in piston, mm 0,010 - 0,022
in connecting rod, mm 0,0