3855049 Valve Stem Seal | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve stem seal from the Engine group, weighing 23 grams and listed for 21 applications on DPX drives. It supersedes part number 3854121, which was catalogued earlier as a cap.

🚤 Compatibility

• Engine Family: DPX

Full model list at the end of this description.

⚙️ Key Features

• 23 grams
• Supersedes 3854121, catalogued earlier as a cap
• 21 listed applications on DPX drives
• 16 used per assembly

🔌 Function

Controls the oil passing down the valve stem into the guide, keeping the guide lubricated while stopping oil being drawn into the port.

⚠️ Common Signs of Failure

• Puff of blue smoke on start-up or after idling at a berth
• Oil consumption rising with no external leak
• Smoke on the overrun coming off cruising revs
• Oily deposits on the valve stems and in the ports on strip-down
• Seals found hard, cracked or split when the springs come off

🛠️ Service Notes

• Renew every seal on the head together - they harden at the same rate
• Seal 3854956 in the Engine group supersedes a number that was itself catalogued as a valve stem seal, so check which part the head takes before ordering
• Check the valve guides for wear first, as worn guides smoke again whatever the seals

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3855049 → Supersedes 3854121

OEM / Related Numbers

• 3854121 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 7.4GiPEFS, 7.4GiPBYCCE, 7.4GiPWTR, 7.4GSiPBYCCE, 7.4GSiPEFS, 7.4GSiPWTR, 7.4GSiXNCB, 7.4GSiXNCM, 3.0GSMBYMCE, 8.2GSiPBYCCE, 8.2GSiPEFS, 8.2GSiPWTR, 8.2GSiXNCB, 7.4GSIINCS, 7.4GSIINCC
• Volvo Penta DPX385XBYDCE, DPX385XEFS, DPX385XLKE
• Volvo Penta DPX415XEFS, DPX415XLKE, DPX415XBYDCE