3801458 Longblock Engine | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta remanufactured long block for the 8.1L-LO/496 cu in. V8 in Gi, Osi and Gen+ form, with Vortex cylinder heads, roller lifters, roller rocker arms and crank sensor, listed in the reman catalogue as fitting 2001 and newer. Volvo Penta define a Reman long block as a cylinder block assembly with pistons, connecting rods, crankshaft, camshaft, cylinder heads, rocker mechanism, oil pan and valve cover, and the complete-engine items stop outside that list. It weighs 352 kg, the heaviest of the ten long blocks listed here, covers 54 applications and consolidates three earlier numbers, 3801521, 3801459 and 3863398. This unit is supplied on an exchange basis: core deposit 3804458 is charged alongside it and refunded once the old unit is returned, so both numbers appear on the order.

⚙️ Key Features

• 8.1L-LO/496 cu in. V8 Gi, Osi and Gen+, fits 2001 and newer
• Vortex cylinder heads with roller lifters, roller rocker arms and crank sensor
• Contains block, pistons, connecting rods, crankshaft, camshaft, cylinder heads, rocker mechanism, oil pan and valve cover
• 352 kg, the heaviest of the ten long blocks here
• Consolidates 3801521, 3801459 and 3863398
• Also supersedes Volvo part number 3862896

🔌 Function

Supplies the block, crankshaft, pistons, camshaft, cylinder heads and rocker gear as one remanufactured assembly, replacing the core of a worn or damaged engine without a full new unit.

⚠️ Common Signs of Failure

• Compression down on one or more cylinders
• Crankcase pressure blowing oil out of the breather
• Metallic knock that gets worse with load
• Oil pressure below specification at temperature
• Coolant and oil mixing

🛠️ Service Notes

• Three earlier numbers now resolve to this one, so an old quotation under any of them is still valid
• The high-output 8.1L-HO/496 package is 3801457, so read the rating off the engine before ordering
• At 352 kg this needs lifting gear and freight handling, and the core goes back once the new engine is running

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3801458 → Supersedes 3801521

OEM / Related Numbers

• 3801459 earlier number superseded by this part
• 3863398 earlier number superseded by this part
• 3801521 earlier number superseded by this part

📦 Condition

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