21849858 Pipe | Genuine Volvo Penta Part

🔧 Product Description

Rigid coolant pipe in the D13B-E MG temperature-control system, used with the separately mounted 220-240 V, 2000 W engine-heater arrangement. It forms part of the coolant circulation path between heater hoses and the engine.

🚤 Compatibility

• Engine Family: D

Full model list at the end of this description.

⚙️ Key Features

• D13B-E MG temperature-control application
• Engine-heater coolant routing
• Rigid factory pipe geometry
• Used with 2000 W heater option
• Correct clamp and hose interface
• Engine type: 13-litre marine-commercial diesel

🔌 Function

Carries coolant through the optional electric engine-heater circuit to promote reliable cold starting and reduce warm-up time.

⚠️ Common Signs of Failure

• Coolant leakage at a pipe or hose joint
• Corrosion or pinhole leakage
• Restricted heater circulation
• Cracked mounting point
• Engine heater operates but coolant does not warm evenly

🛠️ Service Notes

• Offer the pipe up and check it reaches both connections freely before you tighten anything — a rigid pipe pulled into place is a pipe left under permanent strain, and strained pipes crack at the fittings in service
• Renew the sealing washers, O-rings or union seals that go with the pipe rather than reusing the old ones, and make sure the seats, faces and threads are clean
• Keep the ends capped while you work and blow or flush a pipe through before fitting; anything left inside goes straight into the oil, fuel or coolant system
• Tighten unions and banjo bolts evenly to the figures in the workshop manual for your engine — overtightening distorts the seat and starts the leak you were trying to cure
• Refit every clip and support bracket in its original place and keep the pipe clear of hot or moving parts so it cannot chafe or be shaken to failure

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21849858 → Supersedes 21593449

OEM / Related Numbers

• 21593449 earlier number superseded by this part
• 21578298 (related engine heater)
• 22310451 (220-240 V, 2000 W heater)
• 943369 (related rubber hose)
• 994559 (related hose clamp)
• 21593140 (related pipe)
• 952631 (related clamps)
• 949786 (related clamps)

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C3-B MH, D13C1-B MH, D13C4-B MH, 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), D13C4-B MP, D13C5-B MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C2-A MG, D13C1-A MG, D13C8-B MP