838638 Exhaust Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta exhaust valve from the Engine group, weighing 0.138 kg and listed for 62 applications across the TAMD, AD, D, TMD, KAMD and MD series.

🚤 Compatibility

• Engine Family: TAMD, AD, D, TMD, KAMD, MD, KAD

Full model list at the end of this description.

⚙️ Key Features

• 0.138 kg
• 62 applications across six engine series
• Exhaust valve, paired with inlet valve 838637
• Quantity varies by assembly, most commonly four

🔌 Function

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

⚠️ Common Signs of Failure

• Compression loss with a puffing or hissing exhaust note
• Valve face burnt, cupped or eroded at the edge
• Heavy carbon build-up on the head and stem
• Stem sticking or worn in the guide
• Clearance closing up as the valve sinks into its seat

🛠️ Service Notes

• Inlet valve 838637 is the matching inlet at 0.095 kg, so the 43 gram difference makes the pair distinguishable, but order by number to be certain
• Check seat width and recession while the head is off, since a burnt exhaust valve normally means the seat needs work as well
• Renew valve guides and stem seals as required

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD31L-A, TAMD31M-A, TAMD31P, TAMD31P-A, TAMD31S, TAMD31A, TAMD31B, TAMD31D
• Volvo Penta TAMD41B, TAMD41D, TAMD41H-A, TAMD41H-B, TAMD41M-A, TAMD41P-A, TAMD41P, TAMD41A
• Volvo Penta AD31, AD31B, AD31D, AD31D-A, AD31L-A, AD31P-A, AD31XD
• Volvo Penta AD41B, AD41D, AD41L-A, AD41P-A, AD41A, AD41BJ
• Volvo Penta TMD31A, TMD31B, TMD31D, TMD31L-A
• Volvo Penta TMD41A, TMD41B, TMD41D, TMD41L-A
• Volvo Penta D41B, D41D, D41L-A
• Volvo Penta KAD42A, KAD42B, KAD42P-A
• Volvo Penta KAD44P, KAD44P-B, KAD44P-C
• Volvo Penta KAMD42A, KAMD42B, KAMD42P-A
• Volvo Penta KAMD43P, KAMD43P-A, KAMD43P-B
• Volvo Penta KAMD44P-B, KAMD44P-C, KAMD44P-A
• Volvo Penta TAMD42WJ-A, TAMD42B
• Volvo Penta KAD300-A
• Volvo Penta KAD32P
• Volvo Penta KAD43P-A
• Volvo Penta KAMD300-A
• Volvo Penta MD31A