1378870 Gasket | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta gasket from the Engine system group, used to seal a mating joint between engine components and prevent leakage of fluid or combustion gases. It fits the four-cylinder AQ-series petrol engines and the 230 and 250 marine engine models. This part number supersedes the earlier gasket 1336753 and is the current replacement for that item.

🚤 Compatibility

Typically suits:

• Volvo Penta AQ125B
• Volvo Penta AQ131A
• Volvo Penta AQ131B
• Volvo Penta AQ131C
• Volvo Penta AQ131D
• Volvo Penta AQ151A
• Volvo Penta AQ151B
• Volvo Penta AQ151C
• Volvo Penta AQ145B
• Volvo Penta 230A
• Volvo Penta 230B
• Volvo Penta 250A
• Volvo Penta 250B

• Engine Family: AQ
• Year Range: Approximately late 1970s-early 1990s

⚙️ Key Features

• OEM Volvo Penta part number 1378870
• Supersedes previous part number 1336753
• System group: Engine
• Net weight 0.045 kg
• Fits AQ125, AQ131, AQ145 and AQ151 series petrol engines plus 230 and 250 models
• Engine type: Volvo B200 / B230 overhead-cam inline four-cylinder petrol engine
• System type: Valve cover to cylinder-head seal

🔌 Function

The gasket forms a compressible seal between two machined engine surfaces, keeping oil, coolant or combustion gases contained within their intended passages. It also compensates for minor surface irregularities between the mating components.

⚠️ Common Signs of Failure

• Visible oil or coolant seepage along the joint line
• Loss of sealing pressure or gases escaping from the mating faces
• Hardened, brittle or cracked gasket material on inspection
• Crushed, distorted or blown-out sections after overheating
• Repeated need to re-torque fasteners at the joint

🛠️ Service Notes

• Fit a new gasket every time the joint is disturbed — a gasket takes a permanent set once it has been torqued and will not seal reliably a second time
• Scrape both faces back to clean bare metal, keeping the blade at a shallow angle so it lifts the old material without gouging the surface, and use a plastic scraper on aluminium castings
• Check the faces for flatness, cracks and corrosion pitting, and make sure no old gasket, carbon or hardened sealant is left in the corners or around the bolt holes
• Fit the gasket dry unless the workshop manual for your engine calls for a sealant, and then only the type it specifies — surplus sealant squeezes out into oil, coolant and fuel passages
• Draw the fasteners down progressively in the sequence and to the torque given in the manual for your engine, and recheck after the first heat cycle where the manual asks for it

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1378870 → Supersedes 1336753

OEM / Related Numbers

• 1336753 earlier number superseded by this part
• Volvo B200 / B230 valve cover, camshaft and cylinder-head components

Other-Brand OEM Numbers

• Mahle: VS50020

Aftermarket / Verified Equivalents

• Sierra Marine: 18-2972
• Orbitrade: 12870

📦 Condition

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