20523556 Shim | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta shim is an OEM service component used in the Cylinder-Liner Protrusion Shim. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta 16-litre D16/TAD16/TWD16 diesel application. Technical identification: 0.30 mm cylinder-liner adjustment shim. In service, it provides a precisely selected thickness used to establish the specified cylinder-liner protrusion or assembly clearance. Selection must be confirmed by OEM part number 20523556, the exact model/product number, serial number and installed assembly configuration.

🚤 Compatibility

• Engine Family: D, TAD, TWD
• HP Range: 230 HP

Full model list at the end of this description.

⚙️ Key Features

• OEM part number 20523556
• Technical distinction: 0.30 mm cylinder-liner adjustment shim
• Measure the installed clearance or liner protrusion at the specified points and select the required thickness; do not substitute by part number alone.
• TH=0.3mm (Volvo assembly listing)

🔌 Function

Provides a precisely selected thickness used to establish the specified cylinder-liner protrusion or assembly clearance. Measure the installed clearance or liner protrusion at the specified points and select the required thickness; do not substitute by part number alone.

⚠️ Common Signs of Failure

• Cylinder-liner protrusion outside the specified range
• Repeated head-gasket leakage or combustion gas entering coolant
• Coolant or oil leakage at the liner/deck interface
• Low compression or uneven cylinder sealing
• Fretting, corrosion, deformation or incorrect shim thickness

🛠️ Service Notes

• Shims are supplied in graded thicknesses and exist to bring a setting into specification, so measure with a micrometer and select the thickness the setting procedure for your engine calls for rather than matching one by eye
• Note which shim came from which position on removal and keep them identified — once an assembly has bedded in, shims are not interchangeable between positions
• Check both faces are clean, flat and free of burrs, corrosion and old sealant before fitting; dirt trapped under a shim shifts the setting as surely as the wrong thickness does
• Discard any shim that is dished, cracked, pitted or fretted rather than reusing it, and make sure no old shim has been left behind in the recess
• Recheck the clearance or setting after the assembly is tightened down, because clamping load can change the measurement you took loose

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• SLP: CLAS-556 (0.30 mm)
• SRP: S-23556

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D16C-A MG, D16C-A MH, D16C-B MH, D16C-C MH, D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C-D MH, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
• Volvo Penta D13C3-B MH, D13C4-B MH, D13C5-B MP, D13C3-B MG, D13C4-B MG, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP
• Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
• Volvo Penta D8A6-A MH, D8A6-A MG
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TWD1683GE-B, TWD1683VE
• Volvo Penta D4-230I-G
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE
• Volvo Penta TWD1672-1673GE
• Volvo Penta TWD1682-83GE