T: +8615609213525
E: 15829336298@139.com
E: 15829336298@139.com
Room 1212-G107, Unit 2, Building 1, Block A, Shenglong Plaza, No. 80 Weiyang Road, Weiyang District, Xi'an City, Shaanxi Province
| Quantity: | |
|---|---|
201V02500-6191
Sinotruk HOWO
| Attribute | Description |
|---|---|
| Part Name | Piston Ring Set / Compression & Oil Control Rings |
| OEM Number | 201V02500-6191 (also written as 201025006191) |
| Alternate Part Number | 202V02503-6004 (related variant or sub-set) |
| Set Composition | |
| • Top Ring: 1st Compression Ring (Tapered or Barrel Face) | |
| • Second Ring: 2nd Compression Ring (Twist or Napier Type) | |
| • Oil Ring: 3-Piece Oil Scraper (Rail + Expander + Rail) | |
| Quantity per Cylinder | 3 rings (standard configuration) |
| Bore Diameter (Cylinder Bore) | OEM standard size — matches MC13 engine cylinder bore (typically ~126–130 mm depending on model) |
| Ring Thickness (Radial Width) | |
| • 1st & 2nd Ring: 1.5 mm – 4.0 mm | |
| • Oil Ring: Wider profile (~5–6 mm) | |
| Material | High-strength alloy cast iron with advanced surface treatment |
| Surface Treatment | |
| • Top ring: Chrome-plated or Nitrided for wear resistance | |
| • Second ring: Molybdenum-coated or anti-scuff coating | |
| • Oil ring: Stainless steel rails with corrosion-resistant expander | |
| Function | |
| • Seals combustion chamber to prevent blow-by | |
| • Transfers heat from piston to cylinder wall | |
| • Controls lubricating oil — scrapes excess off walls, prevents burning | |
| Engine Compatibility | Designed for SINOTRUK MC13 series with MAN technology |
| Condition | Brand new (OEM fresh stock or premium aftermarket) |
Name1
Name2
Professional Installation Required
Must be performed by certified diesel mechanics in a clean environment.
Contamination by dust or debris causes immediate scoring.
Replace as Part of Full Piston Kit
Use complete Piston Ring + Piston + Liner + Pin Kit for best results.
Mixing old and new parts leads to mismatched clearances.
Check Cylinder Bore Condition First
Measure taper and out-of-roundness.
Hone or re-bore if necessary before installing new rings.
Observe Correct Ring Orientation
Install all rings with "TOP" marking facing upward.
Do not rotate oil ring expander — align gap correctly.
Gap Placement During Installation
Stagger end gaps at 120° apart (for 3-ring system).
Never align all gaps together — creates leakage path.
Use Proper Tools
Use ring compressor tool to avoid breaking rings during assembly.
Avoid hammering or forcing into block.
Lubricate Before Assembly
Apply engine assembly lube or clean motor oil to ring surfaces and grooves.
Ensures smooth break-in and prevents dry start damage.
Verify End Gap Clearance
Insert ring into cylinder bore and measure end gap with feeler gauge.
Typical clearance: 0.3–0.6 mm (check service manual).
Avoid Touching Friction Surfaces
Clean hands or wear gloves — skin oils can affect coating performance.
Follow Break-In Procedure
First 500–1,000 km: Vary RPM and load.
Avoid sustained high speed or idling.
Change oil early (after 500 km) to remove initial wear particles.
Do Not Reuse Old Rings
Once removed, rings lose tension and cannot reseal properly.
Storage Advice
Keep sealed in original packaging until use.
Store flat in dry indoor environment.
| Attribute | Description |
|---|---|
| Part Name | Piston Ring Set / Compression & Oil Control Rings |
| OEM Number | 201V02500-6191 (also written as 201025006191) |
| Alternate Part Number | 202V02503-6004 (related variant or sub-set) |
| Set Composition | |
| • Top Ring: 1st Compression Ring (Tapered or Barrel Face) | |
| • Second Ring: 2nd Compression Ring (Twist or Napier Type) | |
| • Oil Ring: 3-Piece Oil Scraper (Rail + Expander + Rail) | |
| Quantity per Cylinder | 3 rings (standard configuration) |
| Bore Diameter (Cylinder Bore) | OEM standard size — matches MC13 engine cylinder bore (typically ~126–130 mm depending on model) |
| Ring Thickness (Radial Width) | |
| • 1st & 2nd Ring: 1.5 mm – 4.0 mm | |
| • Oil Ring: Wider profile (~5–6 mm) | |
| Material | High-strength alloy cast iron with advanced surface treatment |
| Surface Treatment | |
| • Top ring: Chrome-plated or Nitrided for wear resistance | |
| • Second ring: Molybdenum-coated or anti-scuff coating | |
| • Oil ring: Stainless steel rails with corrosion-resistant expander | |
| Function | |
| • Seals combustion chamber to prevent blow-by | |
| • Transfers heat from piston to cylinder wall | |
| • Controls lubricating oil — scrapes excess off walls, prevents burning | |
| Engine Compatibility | Designed for SINOTRUK MC13 series with MAN technology |
| Condition | Brand new (OEM fresh stock or premium aftermarket) |
Name1
Name2
Professional Installation Required
Must be performed by certified diesel mechanics in a clean environment.
Contamination by dust or debris causes immediate scoring.
Replace as Part of Full Piston Kit
Use complete Piston Ring + Piston + Liner + Pin Kit for best results.
Mixing old and new parts leads to mismatched clearances.
Check Cylinder Bore Condition First
Measure taper and out-of-roundness.
Hone or re-bore if necessary before installing new rings.
Observe Correct Ring Orientation
Install all rings with "TOP" marking facing upward.
Do not rotate oil ring expander — align gap correctly.
Gap Placement During Installation
Stagger end gaps at 120° apart (for 3-ring system).
Never align all gaps together — creates leakage path.
Use Proper Tools
Use ring compressor tool to avoid breaking rings during assembly.
Avoid hammering or forcing into block.
Lubricate Before Assembly
Apply engine assembly lube or clean motor oil to ring surfaces and grooves.
Ensures smooth break-in and prevents dry start damage.
Verify End Gap Clearance
Insert ring into cylinder bore and measure end gap with feeler gauge.
Typical clearance: 0.3–0.6 mm (check service manual).
Avoid Touching Friction Surfaces
Clean hands or wear gloves — skin oils can affect coating performance.
Follow Break-In Procedure
First 500–1,000 km: Vary RPM and load.
Avoid sustained high speed or idling.
Change oil early (after 500 km) to remove initial wear particles.
Do Not Reuse Old Rings
Once removed, rings lose tension and cannot reseal properly.
Storage Advice
Keep sealed in original packaging until use.
Store flat in dry indoor environment.
