21645842 Coolant Pipe | Genuine Volvo Penta Part

🔧 Product Description

Rigid engine-coolant pipe used in the Volvo Penta D13 marine cooling system. It carries coolant between the engine, heat-exchanger and adjoining pipework using the original sealing and support arrangement.

🚤 Compatibility

• Engine Family: D

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta D13 coolant pipe
• Used in D13B marine cooling layouts
• Original bends and flange geometry
• Associated spacer and O-ring references identified
• Serial-specific marine application
• Engine type: 12.8-litre inline-six turbocharged marine diesel

🔌 Function

Transfers engine coolant through the D13 cooling circuit while maintaining a pressure-tight connection.

⚠️ Common Signs of Failure

• Coolant seepage at pipe ends
• Corrosion or pinhole leakage
• Bent pipe causing poor alignment
• Damaged O-ring lands
• Overheating or coolant loss after service

🛠️ 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

• 21645842 → Supersedes 3594795

OEM / Related Numbers

• 3594795 earlier number superseded by this part

Other-Brand OEM Numbers

• VOE21645842

Aftermarket / Verified Equivalents

• Earlier related pipe: 3594795
• Related pipe/component: 3849370
• Spacer: 3155142
• O-ring: 975697

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C4-B MH, D13C1-B MH, D13C2-B MP, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-N MH, D13B-N MH (FE), D13B-B MP, D13B-D MP, D13B-J MP, D13B-M MP, D13C4-B MP, D13C5-B MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP