High-alloy Heat-resistant Steel Exhaust Valve with Stellite-faced Tip and Precision-ground Stem for Isuzu FVR23 6SD1T Engine
Key Attributes
Product Summary
Exhaust Valve 1-12552108-2 for Isuzu FVR23 6SD1T engine. Made from high-alloy heat-resistant steel with hardened/Stellite-faced tip. Direct OEM replacement ensuring perfect fit and long service life. Restores engine performance and eliminates compression loss.
Product Details
Heat-resistant Steel Exhaust Valve for Isuzu FVR23
,Stellite-faced Tip Exhaust Valve
,Precision-ground Stem Exhaust Valve
| Part Numbers | 1-12552108-2, 1125521082, 1-12552085-1, 1125520851 |
| Vehicle Model | ISUZU FVR23 |
| Engine Model | ISUZU 6SD1T (Heavy-duty Diesel) |
| Condition | 100% Brand New |
| Material | High-strength aluminum alloy & precision bearings |
| Cooling Type | Engine coolant circulation |
| Quality Standard | OEM equivalent / ISO quality control |
| Warranty | 6 Months |
| Main Markets | Middle East, Asia, Africa, South America, North America & Europe |
- OE Quality: Manufactured to Isuzu dimensional and material specifiions for perfect fit and long service life
- High-Temperature Alloy: 21-4N or equivalent steel resists oxidation, creep, and thermal fatigue
- Stellite-Faced Tip: Hardfacing on the valve tip reduces wear from rocker arm contact
- Precision-Ground Stem: Smooth surface reduces guide wear and ensures proper oil control
- Hardened Valve Face: Provides durable sealing against the valve seat, preventing gas leakage
- Restores Engine Performance: Eliminates compression loss, rough idle, and excessive exhaust smoke
- Direct Replacement: Matches OE length, head diameter, and stem size - no modifiion required
- Full Set of 6: Complete set for a 6-cylinder engine
- ISUZU FVR23 (heavy-duty truck, 6×4 configuration)
- May also fit other Isuzu heavy models with 6SD1T engine (e.g., CXZ, CYZ) - verify compatibility
- Remove cylinder head - as per engine service manual
- Clean cylinder head - remove carbon deposits from valve ports and combustion chamber
- Remove old exhaust valves - use valve spring compressor to release keepers, remove spring, and pull out valve
- Inspect valve guides - measure stem-to-guide clearance. Replace guides if worn
- Inspect valve seats - grind or cut seats to proper angle and width
- Lubrie new valve stem - with engine oil or assembly lube
- Insert new exhaust valve - into the guide from the combustion chamber side
- Install valve spring, retainer, and keepers - compress spring and secure keepers
- Lap the valve (if necessary) - apply lapping compound and rotate valve against seat to ensure sealing
- Check installed height - measure valve spring height; adjust with shims if needed
- Reinstall cylinder head - with new head gasket. Torque head bolts to specifiion
- Adjust valve clearance - set exhaust valve lash to OE specifiion (typically 0.35-0.45mm cold for 6SD1T)
- Start engine - check for smooth operation and correct valve train noise
- Material Verifiion: Alloy composition tested via spectrometer
- Dimensional Inspection: Head diameter, stem diameter, overall length, and keeper groove position verified
- Hardness Testing: Tip hardness (HRC 50-55) and stem hardness checked
- Surface Finish Inspection: Stem surface roughness measured (Ra ≤ 0.2 μm)
- Straightness Test: Valve stem runout checked (≤ 0.05mm)
- Visual Inspection: 100% checked for cracks, burrs, or surface defects
- Packaged Safely: Valves wrapped in protective plastic or oiled paper, boxed as a set
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