C509 S776 S505 Timing Chain Kits For Chevrolet
The DUHUI Bearing C509 timing chain kit is an OE-replacement component for General Motors vehicles equipped with the 4.3L Vortec V6 engine. This timing chain kit includes the timing chain (C509), cam sprocket (S776), and crank sprocket (S505), ensuring proper camshaft-to-crankshaft synchronization for optimal engine performance. Manufactured to match original equipment specifications, this kit delivers reliable performance for compatible GM vehicles including Astro Van, Blazer, C/K Series trucks, and Express vans.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | |
| Part Number | C509 |
| Kit Type | Timing Chain Kit |
| Timing Chain | C509 |
| Cam Sprocket | S776 |
| Crank Sprocket | S505 |
| Chain Type | Silent (Inverted Tooth) |
| Link Quantity | 46 |
| Chain Length | 288.93 mm (11.375 inch) |
| Chain Width | 15.75 mm (0.620 inch) |
| Chain Pitch | 12.70 mm (0.500 inch) |
| Row Quantity | 1 |
| Engine Displacement | 4.3L (262 cu in) |
| Engine | L35, LF6, LU3 V6 |
| Valve Configuration | OHV 12v |
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:
10128485, 346261, 8101284850
Reference Numbers (Interchange):
Cloyes: C509, S776, S505
Enginetech: C509, S776, S505
S.A. Gear: C509, S776, S505
Vehicle Fitment
CHEVROLET: Astro Van 1992-1998, Blazer 1995-1998, C/K Series Trucks 1992-1998, Express 1500/2500 1996-1998, S10 1996-1998
GMC: Jimmy 1995-1998, Safari 1992-1996, Savana 1500/2500 1996-1998, Sonoma 1996-1998, Sierra 1500 2002
OLDSMOBILE: Bravada 1996-2001
ISUZU: Hombre 1997-2000
Engine: 4.3L V6 (VIN W, X) – L35, LF6, LU3
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.
- Silent (inverted tooth) chain design reduces noise and vibration during operation.
- Pre-stressed chain 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 4.3L Vortec V6 engines with balance shaft.
- OE-grade materials and manufacturing standards ensure 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 camshaft sprocket bolt and crank sprocket bolt to manufacturer specifications.
- After installation, rotate engine manually to verify proper timing alignment.
- Clean and sufficient oil is key to maximum timing system life – use manufacturer-recommended oil and service intervals.
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
