21508875 Overhaul Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta cylinder-head rebuild package for D13B and D13C engines through engine serial number 2013429710. The kit renews all six intake valves, all six exhaust valves, valve seats, guides, injector sleeves, seals and retaining cotters required for a complete twelve-valve cylinder-head overhaul.

🚤 Compatibility

• Engine Family: D
• HP Range: Approximately 0-400 HP
• Year Range: Approximately late 2000s - mid-2010s
• Serial Range: SN-XX13429710

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta complete D13 cylinder-head overhaul kit
• Correct Volvo Penta part number 21508875
• Includes valves, seats, guides, injector sleeves, seals and cotters
• Configured for six-cylinder D13 engines through ESN 2013429710
• Aftermarket cylinder-head rebuild kits are available
• Engine type: Volvo Penta D13 12.8L inline six-cylinder common-rail diesel

📋 Kit Contents

• 6 × exhaust valve seat - 20530103
• 6 × intake valve seat - 20740804
• 12 × valve guide - 20904074
• 6 × injector sleeve - 21274700
• 6 × injector-sleeve O-ring - 20536487
• 6 × injector copper washer - 21261987
• 6 × inlet valve - 20740798
• 6 × exhaust valve - 20768519
• 24 × valve cotter - 20510747
• 12 × valve stem seal - 20864662
• Cylinder-head gasket / service gasket - 11996
• Associated service gasket - 18665 where supplied for the engine configuration

🔌 Function

The kit restores the valve and injector-sleeve sealing surfaces in the cylinder head, returning compression, airflow, valve control and injector sealing to overhaul specification.

⚠️ Common Signs of Failure

• Low compression, burned valves or damaged valve seats
• Excessive valve-guide clearance or oil consumption
• Coolant or combustion leakage around injector sleeves
• Valve-stem seals hardened or leaking
• Cylinder head cannot meet pressure, vacuum or valve-seat tests

🛠️ Service Notes

• Lay the kit out against the assembly before you start, so you can confirm it matches the unit you are working on and that nothing is missing
• Use everything the kit supplies — the point of an overhaul kit is that every wearing seal and gasket is renewed at once, and leaving one original seal in place is the usual cause of a repeat failure
• Work clean: these kits go into fuel, oil, cooling and hydraulic units where a single piece of grit will ruin the job, so clean the outside of the unit and cap open ports before opening it up
• Inspect what the kit does not replace — bores, sealing faces, shafts and threads — because a kit cannot make up for a worn or scored housing
• Follow the assembly sequence and the tightening figures in the workshop manual for your engine, and note that some kits include fasteners intended for single use

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21508875 current cylinder-head overhaul-kit reference for ESN through 2013429710

OEM / Related Numbers

• 20530103 exhaust seat
• 20740804 intake seat
• 20904074 valve guide
• 21274700 injector sleeve
• 20740798 inlet valve
• 20768519 exhaust valve
• 20510747 cotter
• 20864662 valve seal

Other-Brand OEM Numbers

• VOE21508875

Aftermarket / Verified Equivalents

• MK Parts: 18V08875
• VolvoKits: HRK-8875
• SLP: application-matched D13 cylinder-head repair kit
• Dumper Depot: HRK-8875

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-A MP, D13B-H MP, D13B-G MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-K MP, D13B-N MH, D13B-N MH (FE), D13B-B MP, D13B-D MP, D13B-J MP, D13B-C MP, D13C5-B MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C5-A MP, D13C2-A MG, D13C1-A MG