859789 Insert | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta insert for 859784, from the Cooling System group, weighing 2.252 kg and listed for 2 applications across the MD series. It is much the heaviest of the five parts listed in this run for 859784 — the others are cap 859787, rim 859790, cover 859792 and sleeve 859794.

🚤 Compatibility

Typically suits:

• Volvo Penta MD22A
• Volvo Penta MD22L

• Engine Family: MD

⚙️ Key Features

• For 859784
• 2.252 kg
• 2 applications across the MD series
• The heaviest of the five items listed here for 859784

🔌 Function

Forms the working core inside the assembly, carrying the heat exchange surface that the two fluid paths pass either side of.

⚠️ Common Signs of Failure

• Engine running hotter than normal, worst under sustained load
• Coolant loss with no external leak, or oil traces in the coolant
• Insert found silted, scaled or blocked when withdrawn
• Corrosion pitting or perforation of the tube surfaces
• Sacrificial anode, where fitted, eaten away quickly

🛠️ Service Notes

• Withdraw and clean the insert at the service interval rather than waiting for the temperature to climb — silt and scale build up long before they show on the gauge
• Renew the sealing items in the assembly whenever the insert is withdrawn; sleeve 859794 and cover 859792 are the related parts in this run
• At 2.252 kg it is much the heaviest of the five items listed for 859784, so handle it carefully on withdrawal and keep the tube ends from being knocked

📦 Condition

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