Replacement Criteria for Piston 860115232/ZL40.12.4-9 (ZL30G)
Wear Measurement:
Replace if skirt diameter wear exceeds 0.15mm (micrometer).
Ring Groove Inspection:
Discard when side clearance >0.25mm (feeler gauge).
Crack Detection:
Magnetic particle test; reject if cracks >1mm near pin bore.
Carbon Buildup:
Scrap pistons with >5% carbon coverage.
Hardness Check:
Core hardness < HV 300 indicates fatigue.
Deformation Test:
Ovality >0.05mm (dial gauge) requires replacement.
Pin Bore Damage:
Replace if scoring depth >0.02mm (surface profilometer).
Critical Failures:
Scuffing marks on thrust faces (risk of cylinder scoring).
Thermal cracks between ring lands.
Product Deatials
| Part Name | Piston | Part Number | 860115232 860304987 |
| Model | ZL40.12.4-9 / Z6205905500 | Car Model | ZL30G |
| Size | 40*75 | Weight | 0.8KG |
| MOQ | 1 set | Brand Name | CBP |
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