1275403 Oil Filler Cap | Genuine Volvo Penta Part

🔧 Product Description

This is the genuine Volvo Penta oil filler cap, part number 1275403, from the Engine system group. It seals the oil filler opening on the valve cover or rocker cover, keeping lubricating oil contained and contaminants out while the engine runs. It is the current replacement for the earlier oil filler cap 3547599, covering both classic AD/TMD/TAMD 31 and 41 series engines and modern D4 and D6 common-rail diesels.

🚤 Compatibility

• Engine Family: AD, D, TMD, TAMD
• HP Range: 145-480 HP
• Year Range: Approximately 1960s onward, controlled by filler-neck and valve-cover design
• Serial Range: SNXXXXXXXXXX/15949-

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1275403
• System group: Engine
• Net weight approximately 0.057 kg
• Supersedes previous oil filler cap part number 3547599
• Fits AD31, AD41, D41, TMD31, TMD41, TAMD31, TAMD41 and D4 / D6 series marine diesel engines
• Engine type: Volvo Penta marine petrol and diesel

🔌 Function

The oil filler cap closes and seals the engine oil filling point, preventing oil loss, spray and the ingress of dirt, water and debris. It also maintains the intended sealing of the valve cover area so crankcase ventilation works as designed.

⚠️ Common Signs of Failure

• Oil weeping, misting or spray around the filler opening
• Hardened, cracked or flattened sealing gasket on the underside of the cap
• Cap will not stay seated or has lost its locking or threaded engagement
• Visible cracks or damage to the cap body from over-tightening or age
• Oil residue and dirt build-up on top of the valve cover near the filler point

🛠️ Service Notes

• This cap covers both the classic AD31/AD41/TMD/TAMD 31 and 41 engines and the modern D4/D6 common-rail range - confirm which rocker-cover thread your engine uses before ordering, since the two families are generations apart
• Supersedes previous filler cap 3547599; old service records naming that number should be ordered as this one now

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1275403 → Supersedes 3547599 → Supersedes 1378985 → Supersedes 1357893

OEM / Related Numbers

• 3547599 earlier number superseded by this part
• 1378985 earlier number superseded by this part
• 1357893 earlier number superseded by this part
• 11423437 related reference
• 417018 related reference
• 420292 related reference
• 421753 related reference
• 1275379 related sealing gasket
• 940096 earlier related sealing gasket

Aftermarket / Verified Equivalents

• SLP: OFC-599
• SLP: replacement cap for 11423437 / 1275403 / 3547599 / 420292 / 421753
• Crom Marine: 114112

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G, D6-480A-G
• Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G, D4-175 VG
• Volvo Penta TAMD31L-A, TAMD31M-A, TAMD31P, TAMD31P-A, TAMD31S
• Volvo Penta TAMD41H-A, TAMD41H-B, TAMD41P-A, TAMD41P
• Volvo Penta AD31L-A, AD31P-A
• Volvo Penta AD41L-A, AD41P-A
• Volvo Penta D41L-A
• Volvo Penta TMD31L-A
• Volvo Penta TMD41L-A