21605360 Valve Spring | Genuine Volvo Penta Part

🔧 Product Description

Volvo Penta set of sixteen valve springs for GM-based 5.0L, 5.7L and 6.2L Vortec marine V8 cylinder heads.

🚤 Compatibility

• Engine Family: V
• HP Range: 300-320 HP

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta 16-piece valve-spring set
• Supersedes Volvo Penta 21110962
• For GM-based 5.0L, 5.7L and 6.2L Vortec marine V8 applications
• Maintains specified valve closing force and control
• Retainers, cotters and valve-stem seals are not included unless ordered separately
• Engine type: GM-based 5.0L, 5.7L and 6.2L OHV Vortec petrol marine V8

📋 Kit Contents

• 16 × Valve spring — each supplied under set Part Number 21605360
• Valve-spring retainers — not included; order by the applicable engine serial number
• Valve cotters/keepers — not included; order by the applicable engine serial number
• Valve-stem seals — not included; order by the applicable engine serial number

🔌 Function

Closes each intake and exhaust valve and keeps the valve train in contact with the camshaft profile throughout the engine speed range.

⚠️ Common Signs of Failure

• Valve-train ticking or misfire
• Loss of compression or power
• Valve float at higher engine speed
• Broken spring coils or reduced installed pressure
• Uneven spring height or damaged retainers/keepers

🛠️ Service Notes

• Renew valve springs as a complete set for the engine rather than replacing individual springs, and never mix new springs with used ones in the same head
• Check free length and squareness of the new springs against the figures in the workshop manual for your engine, and reject any that are out
• Fit the spring the specified way up where the coils are closer together at one end or where the spring carries a marking, and use the correct seat and retainer for that spring
• Fit a new valve stem seal where one is used, and make sure the collets are fully and evenly seated before the compressor is released — then tap the retainer lightly and confirm nothing has moved
• Keep valves, springs and collets in cylinder order if any used parts are being refitted, and turn the engine over by hand before starting to confirm nothing binds

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21605360 → Supersedes 21110962

OEM / Related Numbers

• 21110962 earlier number superseded by this part

Other-Brand OEM Numbers

• Mercury/Quicksilver 24-48347-1 cross-reference
• Mercury/Quicksilver: 24-48347-1

Aftermarket / Verified Equivalents

• RECMAR: RM24-483471

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 5.7GSiPWTR, 5.7GSiPBYCCE, 5.7GSiPEFS, 5.7GSiPLKD, 5.7GSiPLKE, 5.7GSPBYC, 5.7GSPEFS, 5.7GSPWTR, 5.7GXi-320-R, 5.7GXiE-320-R, 5.7GXi-A, 5.7GXi-B, 5.7GXi-C, 5.7GXi-CF, 5.7GXiC-320-R, 5.7GXiCE-320-R, 5.7GXiC-J, 5.7GXiC-JF, 5.7GXiCE-JF, 5.7GXiCE-J, 5.7GXiCE-M, 5.7GXiC-P, 5.7GXiCE-P, 5.7GXi-D, 5.7GXi-DF, 5.7GXi-E, 5.7GXi-EF, 5.7GXi-J, 5.7GXi-JF, 5.7GXiE-JF, 5.7GXiE-J, 5.7GXiE-KF, 5.7GXiE-K, 5.7GXiE-M, 5.7GXiE-MF, 5.7GXiE-P, 5.7GXi-P, 5.7GXi-F, 5.7GXi-FF, 5.7OSXi-D, 5.7OSXi-DF, 5.7GXi-G, 5.7GXi-GF, 5.7GXi-H, 5.7GXi-HF, 5.7GXiI-A, 5.7GXiI-B, 5.7GXiI-C, 5.7GXiI-D, 5.7GXiI-E, 5.7GXiI-F, 5.7GXiI-G, 5.7GXiI-H, 5.7OSXi-A, 5.7OSXi-AF, 5.7OSXi-B, 5.7OSXi-BF, 5.7OSXi-C, 5.7OSXi-CF, 5.7OSXi-E, 5.7OSXi-EF, 5.7OSXi-J, 5.7OSXi-JF, 5.7OSXiE-JF, 5.7OSXiE-J, 5.7OSXi-G, 5.7OSXi-GF, 5.7GXiE-N, 5.7GXi-N
• Volvo Penta V8-300-C-A, V8-320-C-B, V8-320-CE-B, V8-320-A, V8-320-E-A, V8-320-B, V8-320-E-B, V8-320-C-A, V8-320-CE-A