# 21415584 Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Threaded or retained service cap used on the applicable Volvo Penta engine oil-filter housing. It closes the filter opening, compresses the specified seal and permits access to the internal filter element during scheduled servicing.

## ⚙️ Key Features

-   Genuine Volvo Penta oil-filter housing cap
-   Designed for the matching cartridge-style filter housing
-   Maintains oil pressure with the specified sealing ring
-   Provides service access to the internal filter element
-   Replace if cracked, distorted or damaged by incorrect tools
-   Engine type: Volvo Penta diesel-engine lubrication system

## 🔌 Function

Seals the top of the oil-filter housing and retains the replaceable filter element while allowing access during oil service.

## ⚠️ Common Signs of Failure

-   Oil leakage around the cap seal
-   Cracked cap or damaged tool drive
-   Stripped threads or failure to tighten correctly
-   Low oil level caused by external leakage
-   Cap seized from overtightening or contaminated threads

## 🛠️ Service Notes

-   Clean and inspect the seating face on the housing as well as the cap — most leaks past a cap are the seat or the seal rather than the cap body
-   Renew any separate O-ring or gasket that goes with the cap, and lubricate rubber seals lightly with clean oil or grease so they slide home instead of rolling or tearing
-   Do not over-tighten a cap into a plastic or aluminium housing; it seals on its gasket or O-ring, not on force, and stripped threads mean a much bigger repair
-   Where a cap blanks a port during a repair, keep it fitted right up to the moment of assembly so nothing enters the opening
-   Check the cap is fully home and that any retaining clip, lanyard or locking tab is secure before returning the boat to service

## 📦 Condition

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

## Details

- **Price:** 31.81 AUD
- **Vendor:** Volvo Penta
- **Type:** Filters
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 31.81 AUD | In stock |

## Images

- 21415584 Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21415584-cap-genuine-volvo-penta)
> Updated: 2026-10-12