20450820 Six Point Screw | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta six point screw used in the flywheel housing and rear engine support assembly. It is supplied as an individual service component under part number 20450820 and is intended to restore the original fit, alignment, sealing, support or operating function of the specified assembly. This listing supplies the named part only; adjoining components shown in an parts list for your engine are serviced separately unless explicitly stated.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD
• Serial Range: SN-1099412

Full model list at the end of this description.

⚙️ Key Features

• Six point screw for the flywheel housing and rear engine support assembly
• For engines up to serial number 1099412
• 0.032 kg
• Listed for 26 applications across D, TD, TAD and MD series engines
• Supersedes 20516716, catalogued earlier as a screw

🔌 Function

Secures the designated components using the specified six-point drive and clamping geometry.

⚠️ Common Signs of Failure

• Screw found loose or backed off in the housing
• Knock or vibration from the flywheel housing joint
• Drive recess rounded so a socket no longer bites
• Thread galled or seized, shearing on removal
• Screw body found stretched or necked on inspection

🛠️ Service Notes

• Check the engine serial number against the 1099412 breakpoint before ordering, as later engines take a different screw
• Use a six-point socket rather than a twelve-point one and tighten to the specified torque and sequence

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20450820 → Supersedes 20516716

OEM / Related Numbers

• 20516716 earlier number superseded by this part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 D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAD420VE
• Volvo Penta TAD520VE
• Volvo Penta TAD620VE
• Volvo Penta TAD650VE
• Volvo Penta TAD660VE
• Volvo Penta TAD720VE
• Volvo Penta TAD721VE
• Volvo Penta TAD722VE
• Volvo Penta TAD750VE
• Volvo Penta TAD760VE
• Volvo Penta TAD761VE
• Volvo Penta TAD762VE
• Volvo Penta TAD763VE
• Volvo Penta TAD764VE
• Volvo Penta TAD765VE
• Volvo Penta TD420VE