C202 S634 S645 Timing Chain Kits For Chevrolet
The DUHUI Bearing C202 timing chain kit is an OE-replacement component for General Motors vehicles equipped with 5.7L small block V8 engines. This timing chain kit includes the timing chain (C202), cam sprocket (S634), and crank sprocket (S645), ensuring proper camshaft-to-crankshaft synchronization for optimal engine performance. Manufactured to match original equipment specifications, this kit delivers reliable performance for compatible GM trucks and vans.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | |
| Part Number | C202 |
| Kit Type | Timing Chain Kit |
| Timing Chain | C202 |
| Cam Sprocket | S634 |
| Crank Sprocket | S645 |
| Engine Displacement | 5.7L (350 cu in) |
| Valve Configuration | OHV 16v |
Important: All information on this page is for reference only. Please verify OE numbers, dimensions, and vehicle fitment against your original part before ordering. Contact us for fitment confirmation.
DH Code & OE Numbers & Reference Numbers
DH Code:
OE Numbers:
10128390, 10128389, 10128388
Reference Numbers (Interchange):
Cloyes: C202
S.A. Gear: C202
Melling: 4SR40
Enginetech: TS202
Vehicle Fitment
CHEVROLET: C1500 1985-1992, C2500 1985-1992, K1500 1985-1992, K2500 1985-1992, Suburban C1500/C2500/K1500/K2500 1985-1992, Blazer 1985-1992, Express 1500/2500/3500 1996-1997, G20 1985-1992, G30 1985-1992, P30 1985-1992
GMC: C1500 1985-1992, C2500 1985-1992, K1500 1985-1992, K2500 1985-1992, Suburban C1500/C2500/K1500/K2500 1985-1992, G20 1985-1992, G30 1985-1992, P30 1985-1992
Engine: 5.7L V8 (VIN K, M) – L05, LM1, 350 cu in
Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- Complete timing chain kit includes chain, cam sprocket, and crank sprocket for a full replacement.
- Pre-stressed chain design reduces stretch and increases chain life. Hardened chain pins increase durability.
- Heat-treated gear sprocket teeth reduce wear and increase corrosion resistance.
- Designed specifically for GM 5.7L small block V8 engines from 1985-1996.
- OE-grade materials and manufacturing standards ensure durability and long service life.
Installation Notes
- Verify timing marks on both sprockets are properly aligned before installation.
- Inspect timing chain guides and tensioner for wear – replace if necessary.
- Check crankshaft and camshaft keyways for damage before installing new sprockets.
- Torque cam sprocket bolt and crank sprocket bolt to manufacturer specifications.
- After installation, rotate engine manually to verify proper timing alignment.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces timing chain kits and automotive components to OE specifications. Contact us
