# 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

## Details

- **Price:** 49.97 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 49.97 AUD | In stock |

## Images

- 20523556 Shim | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20523556-shim-genuine-volvo-penta)
> Updated: 2026-08-22