21830838 Coolant Pipe | Genuine Volvo Penta Part

🔧 Product Description

Formed coolant pipe assembly for TAD1640GE-B-TAD1642GE-B engines, supplied with its mounting bracket and flange screw 984734. It routes coolant through the specified engine circuit while preventing vibration damage.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1640-42GE-B

• Engine Family: TAD

⚙️ Key Features

• OEM formed routing
• Correct sealing ends
• Heat- and corrosion-resistant construction
• Designed for original brackets and hoses

📋 Kit Contents

• 1 × formed coolant pipe - 21830838
• 1 × mounting bracket - supplied as part of assembly 21830838; separate number not published
• 1 × flange screw - 984734

🔌 Function

Routes engine coolant through the assigned section of the closed cooling system.

⚠️ Common Signs of Failure

• Coolant seepage at ends or welds
• Cracks at brackets or formed bends
• Restricted flow from scale or deformation

🛠️ Service Notes

• Clean both flanges or spigots and check the sealing lands for pitting and corrosion; renew every O-ring, seal or gasket at the joint rather than reusing one that has taken a set
• Lubricate coolant-side O-rings with coolant or a rubber-safe lubricant — petroleum oil and grease swell and soften the rubber and end up in the coolant
• Offer the pipe up and align both ends before pulling any fastener tight, so the joints are not held together by strain from a misaligned pipe or an over-stretched hose
• Check the bore is clear of scale, sealant and debris before fitting, and inspect the pipe for internal corrosion or thinning if the old one was leaking
• Refill with the coolant type and mix specified for your engine, bleed the system through, then check the joints again with the engine hot and up to pressure

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21830838 → Supersedes 3838168

OEM / Related Numbers

• 3838168 earlier number superseded by this part
• 23816072 - later same-position coolant-pipe reference
• 984734 - supplied flange screw
• 22902431 - coolant pump
• 21613426 - thermostat

OEM Reman Alternatives

• 3801741 - remanufactured coolant pump

📦 Condition

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