DEUTZ MWM TBG620 V16(6002) – 12300235 Exhaust Valve

1. Basic Information

• Part Number: 12300235 (OEM original part)
• Type: Exhaust Valve
• Applicable Models: MWM TBG620 V12/V16/V20 and TBD620 series gas & diesel engines
• Material: High-temperature and corrosion resistant alloy valve steel. The valve head and stem are surface reinforced to deliver outstanding resistance against high-temperature ablation and wear.
• Structure: Integral forging with precision ground valve stem
• Original Reference Price (2026): Approximately €45–51 per piece (exclusive of tax)
• Related Parts:
  • 12300234: Intake Valve
  • Valve seat insert, valve guide, valve spring and valve stem seal (matching components)

2. Functions & Features

3. Common Failures & Replacement

• Common issues: Valve head ablation, wear, carbon buildup, valve stem scoring and sealing failure, which result in insufficient power, abnormal exhaust smoke and increased fuel consumption.
• Replacement Interval: Inspect and replace during major overhaul every 8000–10000 operating hours under normal working conditions.

4. Installation Instructions

1. Thoroughly clean carbon deposits and debris on valves, valve seats and guides before installation.
2. Check valve clearance. Standard exhaust valve clearance: 0.35–0.40 mm.
3. Ensure the valve is fully seated with reliable sealing and no air leakage.
4. Apply special lubricant during assembly to prevent valve stem sticking.