Volvo Penta Valve Stem Seal 861700

Part Details

• Part Number: 861700
• Brand: Volvo Penta
• Official Product Type: Valve Stem Seal
• Supersedes: No confirmed superseding number on record
• Replaced By: 861700 is the current active part number
• Engine Family: Volvo Penta D4, D6, and KAD-series marine diesel
• System: Engine valve train seals the valve stem where it passes through the cylinder head guide, controlling oil entry into the combustion chamber
• Kit Contents: One valve stem seal, supplied individually

Fitment Notice

Valve stem seal fitment is engine-model and serial-number specific. Volvo Penta diesel engines across the D4, D6, and KAD families can use different seal specifications depending on engine generation and cylinder head configuration. Confirm 861700 against the exact engine model, serial number, and the applicable Volvo Penta cylinder head or valve train parts diagram before ordering. Do not select by appearance or stem diameter alone.

Compatible Applications

Parts references associate 861700 with selected applications in the following engine families. Confirm the complete engine designation and serial number before ordering:

• D6 confirmed in multiple parts references
• D4 associated in aftermarket references (confirm by serial number)
• KAD-series associated in aftermarket references (confirm by serial number)

Serial Number Fitment Notice

Confirm fitment by engine model and serial number before ordering. Valve stem seal specifications can vary across otherwise similar engines depending on production generation and cylinder head design. Match by part number through the engine-specific diagram rather than by engine family alone.

Cross-Reference Part Numbers

• 861700 current Volvo Penta part number
• 877072 associated cross-reference
• 877073 associated cross-reference

When This Part Needs Replacement

• Blue or grey smoke from the exhaust, particularly on startup or engine braking a classic sign of oil passing the valve seals
• Increased oil consumption without visible external leaks
• Valve stem seals found worn, hardened, cracked, or distorted during cylinder head service
• Top-end rebuild or cylinder head overhaul
• Any time the cylinder head is removed for other service

Service Interval

Valve stem seals do not have a fixed replacement interval they are replaced on condition. Inspect during any cylinder head or valve train service. Replace whenever seals show hardening, cracking, or loss of sealing ability, or when oil consumption or exhaust smoke indicates seal wear.

Installation Notes

Valve stem seal replacement requires cylinder head access and, depending on the engine, may require valve spring compression tools. Confirm the correct seal orientation before installation incorrect installation will result in immediate oil consumption. Lubricate the seal lips lightly with clean engine oil and install with the appropriate seal driver to avoid distortion. Follow the Volvo Penta service manual for the specific engine model and torque all cylinder head hardware to specification during reassembly.

Related Parts

• 877072 Associated valve seal reference
• 877073 Associated valve seal reference
• D6 Cylinder Head Gasket
• D6 Valve Cover Gasket
• KAD Valve Stem Seal

Parts Desk Insight

Blue smoke at startup that clears after a minute or two is the most reliable symptom of worn valve stem seals oil sits on the seal overnight and gets drawn into the combustion chamber when the engine first starts. If the engine is otherwise running well and oil consumption is moderate, seals are often the culprit. Since cylinder head access is required regardless, its worth replacing all the seals while the head is open rather than just the one that prompted the job. Confirm the part number against the engine serial number before ordering the D4, D6, and KAD families can use different specifications depending on the exact engine version.