ORIGINAL VOLVO 3583870 CRANKCASE

Function and technical context

The crankcase is the piece that closes the lower part of the engine block and acts as a lubricating oil reservoir in the Volvo Penta marine diesel engines of the 30 and 31 series. Integrated into the lubrication system, it collects the oil that returns after circulating through the bearings, the crankshaft and the internal components of the engine, keeping it available to be sucked in again by the oil pump. Its tightness is critical: a leak or deformation in the crankcase causes a loss of oil pressure, which can lead to accelerated wear of the internal components or catastrophic engine failure while underway. This original Volvo Penta factory spare part with reference 3583870 guarantees the exact dimensional fit and the necessary resistance against corrosion and vibrations typical of the marine environment.

When to replace this part?

The most common symptoms that indicate the need to replace the crankcase are the appearance of oil stains under the engine, the smell of burning oil in the engine room or a progressive drop in the oil level without apparent cause in the lubrication circuit. Cracks or deformations in the crankcase bed, common after impacts or due to material fatigue in engines with many hours of work, also require its immediate replacement. It is recommended to visually inspect it at each seasonal maintenance; Replacing this component preventively in the event of any sign of leakage prevents major—and much more costly—breakdowns when the boat is in use.

Volvo Penta Engine Compatibility Table

Equivalent manufacturer part numbers