838126 Exhaust Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta exhaust valve from the Engine group, weighing 0.093 kg and listed for 2 applications on the MD series.

🚤 Compatibility

Typically suits:

• Volvo Penta MD5A
• Volvo Penta MD5B

• Engine Family: MD

⚙️ Key Features

• 0.093 kg
• 2 applications on the MD series
• Exhaust valve, paired with inlet valve 838125

🔌 Function

Opens to release the burnt gases and seals the combustion chamber against firing pressure when closed, working in the hottest part of the head.

⚠️ Common Signs of Failure

• Compression loss with a puffing or hissing exhaust note
• Valve face burnt, cupped or with a notch in the seat
• Heavy carbon build-up on the valve head and stem
• Stem worn or sticking in the guide
• Valve clearance closing up as the seat recedes

🛠️ Service Notes

• Inlet valve 838125 is the matching inlet at 0.095 kg, just 2 grams heavier, so the two cannot be told apart by weight and must be ordered by part number
• Exhaust valve 838179 is the other MD exhaust valve here at 0.104 kg with a single application, so confirm which build the engine is before ordering
• Check the seat width and recession while the head is off, since a burnt exhaust valve usually means the seat needs attention too

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging