# 866095 Pressure Cap | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta pressure cap, not used when an extra expansion tank is mounted, from the Cooling System group. It weighs 0.102 kg and is listed for 105 applications across TAD, TD, TWD, TID, TMD and TAMD series engines. It consolidates part numbers 350578 and 848716, which were catalogued earlier under other names including expansion tank, cover and filler cap.

## 🚤 Compatibility

-   **Engine Family:** TAD, TD, TWD, TID, TMD, TAMD

Full model list at the end of this description.

## ⚙️ Key Features

-   Not used when an extra expansion tank is mounted
-   0.102 kg
-   105 applications across six engine series
-   Consolidates 350578 and 848716
-   Cooling System group

## 🔌 Function

Holds the cooling system at its designed pressure so the coolant can run above its atmospheric boiling point, and relieves that pressure through a spring-loaded valve before it can do damage.

## ⚠️ Common Signs of Failure

-   Coolant pushed out into the overflow or lost after a hard run
-   Boiling or surging in the header tank at temperatures that should be safe
-   Top hose collapsing as the engine cools, showing the vacuum valve is stuck
-   Seal perished, swollen or missing from the underside of the cap
-   Corrosion or coolant crust on the sealing seat

## 🛠️ Service Notes

-   Never open a pressure cap on a hot engine - the coolant beneath it is above its atmospheric boiling point and will flash to steam
-   This cap is not used where an extra expansion tank is fitted - check the installation before ordering
-   Renew the cap with the thermostat and hoses at a coolant change rather than treating it as a permanent fitting

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   866095 → Supersedes 350578 → Supersedes 334687 → Supersedes 308076

### OEM / Related Numbers

-   848716 earlier number superseded by this part
-   350578 earlier number superseded by this part
-   334687 earlier number superseded by this part
-   321973 earlier number superseded by this part
-   346267 earlier number superseded by this part
-   6607209 earlier number superseded by this part
-   308076 earlier number superseded by this part

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TD61A, TD61ACE, TD61AG, TD61AGP, TD61AP, TD61APB, TD61AW
-   Volvo Penta TD71A, TD71ACE, TD71AG, TD71AGP, TD71AP, TD71APB, TD71AW
-   Volvo Penta TAD1030P, TAD1030G, TAD1030GE, TAD1030V, TAD1030VE
-   Volvo Penta TAMD162A, TAMD162B, TAMD162C, TAMD162C-B
-   Volvo Penta TID71AG, TID71AGP, TID71AP, TID71APB
-   Volvo Penta TWD1210G, TWD1210P, TWD1210PB, TWD1210V
-   Volvo Penta TWD610G, TWD610P, TWD610PB, TWD610V
-   Volvo Penta TWD710G, TWD710P, TWD710PB, TWD710V
-   Volvo Penta TAD1630G, TAD1630GE, TAD1630P
-   Volvo Penta TAD730G, TAD730P, TAD730V
-   Volvo Penta TAMD122A, TAMD122A/C, TAMD122D
-   Volvo Penta TD121G-87, TD121GP, TD121GPB
-   Volvo Penta TWD1211V, TWD1211P, TWD1211G
-   Volvo Penta TWD1630G, TWD1630P, TWD1630V
-   Volvo Penta TAD1031G, TAD1031GE
-   Volvo Penta TAD1230G, TAD1230V
-   Volvo Penta TAD1631GE, TAD1631G
-   Volvo Penta TAMD102A, TAMD102D
-   Volvo Penta TAMD73P-A, TAMD73WJ-A
-   Volvo Penta TD610G, TD610V
-   Volvo Penta TID162AGP, TID162AP
-   Volvo Penta TID61AG, TID61AGP
-   Volvo Penta TWD1230ME, TWD1230VE
-   Volvo Penta TWD740GE, TWD740VE
-   Volvo Penta TAD1032GE
-   Volvo Penta TAD1231GE
-   Volvo Penta TAD1232GE
-   Volvo Penta TAD740GE
-   Volvo Penta TAD741GE
-   Volvo Penta TAMD103A
-   Volvo Penta TAMD121D
-   Volvo Penta TAMD163A-A
-   Volvo Penta TAMD165A
-   Volvo Penta TAMD71B
-   Volvo Penta TAMD74A
-   Volvo Penta TD100G
-   Volvo Penta TD1010G
-   Volvo Penta TD1030VE
-   Volvo Penta TD1210G
-   Volvo Penta TD640VE
-   Volvo Penta TD710G
-   Volvo Penta TMD100C
-   Volvo Penta TMD102A
-   Volvo Penta TMD121C
-   Volvo Penta TMD122A
-   Volvo Penta TWD1010G
-   Volvo Penta TWD1030ME
-   Volvo Penta TWD1031VE
-   Volvo Penta TWD1231VE
-   Volvo Penta TWD1620G
-   Volvo Penta TWD630VE
-   Volvo Penta TWD731VE

## Details

- **Price:** 95.51 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 95.51 AUD | In stock |

## Images

- 866095 Pressure Cap | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/866095-pressure-cap-genuine-volvo-penta)
> Updated: 2026-10-09