20440991 Spacer | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta spacer used at six positions in the D12 camshaft gear and vibration-damper assembly. It establishes the correct axial spacing of the gear, wheel and damping components.

🚤 Compatibility

• Engine Family: D, TWD, TAD
• Serial Range: SN260376-

Full model list at the end of this description.

⚙️ Key Features

• Six spacers used in the applicable camshaft assembly
• Confirmed on TAD1240GE, TAD1241GE and TAD1242GE
• Used beside camshaft gear 20450344
• Works with vibration damper 8170954 and wheel 3155166
• Maintains alignment and clamp spacing
• Engine type: Volvo Penta 12-litre diesel
• Quantity varies by assembly, most commonly one

🔌 Function

Maintains the designed axial spacing and alignment in the camshaft gear assembly.

⚠️ Common Signs of Failure

• Gear or damper misalignment
• Abnormal timing-gear noise
• Spacer fretting or deformation
• Loose gear hardware
• Accelerated gear or bearing wear

🛠️ Service Notes

• Refit the spacer in the same position and the same way round as it came out; many spacers set an end float, an alignment or a preload and are not simply packing
• Never leave a spacer out, substitute plain washers for it, or stack washers to make up a missing one
• Keep the faces clean, flat and free of burrs and old sealant, and check the spacer itself for wear, scoring or having been drawn down out of shape
• Where several spacers or shims come out together, keep them in order and refit them in the same sequence
• Tighten the fastening to the figure given in the workshop manual for your engine, then check any clearance or end float the spacer controls

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20440991 → Supersedes 8170574

OEM / Related Numbers

• 8170574 earlier number superseded by this part
• 20593688 - camshaft
• 20450344 - camshaft gear
• 8170954 - vibration damper
• 3155166 - wheel
• 950572 - locating pin

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D12C-A MP, D12D-A MG, D12D-A MH, D12D-A MP, D12D-B MH, D12D-B MP, D12D-C MH, D12D-C MP, D12D-D MP, D12D-E MG, D12D-E MH, D12D-E MP, D12D-F MP, D12D-G MH, D12D-G MP, D12D-H MP
• Volvo Penta TAD1241GE, TAD1241VE, TAD1241-42VE
• Volvo Penta TAD1242GE, TAD1242VE
• Volvo Penta TAD1250VE, TAD1250-52VE
• Volvo Penta TAD1240GE
• Volvo Penta TAD1251VE
• Volvo Penta TAD1252VE
• Volvo Penta TWD1240VE