1266797 Valve Spring Washer | Genuine Volvo Penta Part

🔧 Product Description

This is the genuine Volvo Penta valve spring washer, part number 1266797, from the Engine system group. It seats beneath the valve spring in the cylinder head, providing a flat bearing surface between the spring and the head so the spring loads evenly through every valve cycle. It supersedes the earlier part number 463749 and fits the AQ, BB and 230/250 series four-cylinder petrol engines.

🚤 Compatibility

Typically suits:

• Volvo Penta AQ120B
• Volvo Penta AQ125B
• Volvo Penta AQ125A
• Volvo Penta AQ131A
• Volvo Penta AQ131B
• Volvo Penta AQ131C
• Volvo Penta AQ131D
• Volvo Penta AQ151A
• Volvo Penta AQ151B
• Volvo Penta AQ151C
• Volvo Penta AQ145B
• Volvo Penta 230A
• Volvo Penta 230B
• Volvo Penta 250A
• Volvo Penta 250B
• Volvo Penta BB140A
• Volvo Penta BB145A
• Volvo Penta AQ145A
• Volvo Penta AQ140A

• Engine Family: AQ, BB
• HP Range: Approximately 120-151 HP
• Year Range: Approximately late 1970s-mid-1990s, dependent on spring diameter and cylinder-head specification

⚙️ Key Features

• OEM Volvo Penta part number 1266797
• System group: Engine
• Supersedes earlier part number 463749
• Net weight approximately 0.032 kg
• Fits AQ120B, AQ125, AQ131, AQ140, AQ145, AQ151, BB140A, BB145A and 230/250 series engines
• Genuine Volvo Penta valve train component
• Engine type: Volvo B21/B23/B230 inline 4-cylinder eight-valve petrol engine with 33mm valve springs
• 8 used per assembly

🔌 Function

The valve spring washer forms the lower seat for the valve spring, spreading spring load across the cylinder head surface and keeping the spring correctly located. It prevents the spring coil from cutting into the head and helps maintain consistent valve spring height and pressure.

⚠️ Common Signs of Failure

• Visible grooving, scoring or wear where the spring coil contacts the washer
• Cracked, distorted or dished washer face
• Reduced valve spring installed height leading to weak spring pressure
• Valve train noise or erratic valve action at higher engine speeds
• Spring seat wear into the cylinder head surface caused by a failed washer

🛠️ Service Notes

• Renew as a set when the valve gear is stripped, and keep the parts for each valve together so nothing is mixed between cylinders
• Inspect the seating face for cupping, cracking or a wear step before reassembly and renew rather than reuse anything marked
• Make sure the seat in the head and the face of the washer are clean, with no carbon or swarf trapped underneath
• Fit the correct way up and the correct way round as shown in the workshop manual for your engine, and check the spring and any seal or shroud sit square before the spring is compressed
• Once assembled, check by hand that each valve moves freely and seats fully before the engine is turned over

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1266797 → Supersedes 463749

OEM / Related Numbers

• 463749 earlier number superseded by this part
• 463739 related 33mm valve spring
• 419643 related valve collet
• 1306630 related valve stem seal
• 463395 related inlet valve
• 463526 related exhaust valve

Aftermarket / Verified Equivalents

• Skandix catalogue reference: 1028669
• Skandix 1028668 corresponding 33mm lower spring cap

📦 Condition

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