Piston clearance Suzuki SX4 I facelift

Piston clearance

Measure cylinder bore diameter and piston diameter to find their difference called is piston clearance.

Piston clearance should be within its standard value.

If it is out of its limit, replace piston.

Note. Cylinder bore diameters used here are measured in thrust direction at two positions.

Piston clearance

Limit: 0.12 mm (0.0047 in.)

Ring groove clearance

Scheme 188

1. Before checking, piston grooves must be clean, dry and free from carbon deposits.
2. Fit new piston ring (1) into piston groove.
3. Measure clearance between ring and ring land using thickness gauge (2). If clearance is out of limit, replace piston. Ring groove clearance RING GROOVE CLEARANCE Standard Limit 1st ring 0.03 - 0.07 mm (0.0012 - 0.0027 in.) 0.11 mm (0.0043 in.) 2nd ring 0.02 - 0.06 mm (0.0008 - 0.0023 in.) 0.11 mm (0.0043 in.) Oil ring 0.03 - 0.17 mm (0.0012 - 0.0066 in.)