21026535 Inlet Valve | Genuine Volvo Penta Part

🔧 Product Description

Brand-new genuine Volvo Penta inlet valve precision-machined for use in the Volvo Penta TAD420VE and TAD620VE cylinder-head valvetrain. Its stem, face, head diameter and material are matched to the original cylinder head and valve-seat specification.

🚤 Compatibility

Typically suits:

• Volvo Penta TD420VE
• Volvo Penta TAD620VE
• Volvo Penta TAD420VE

• Engine Family: TD, TAD
• Serial Range: SN10128118-

⚙️ Key Features

• Genuine engine valve
• Correct stem and valve-face geometry
• Material suited to intake or exhaust temperature duty
• Maintains factory airflow and combustion sealing
• Valve only; seat, guide, spring, collets and seals are separate
• Engine type: Volvo Penta four- and six-cylinder industrial diesel

🔌 Function

Opens and closes at the commanded camshaft timing to control cylinder gas exchange while sealing combustion pressure against the valve seat.

⚠️ Common Signs of Failure

• Low compression or cylinder misfire
• Burnt, pitted or recessed valve face
• Bent stem or sticking in the guide
• Excessive valve clearance or uneven seating
• Exhaust smoke, difficult starting or loss of power

🛠️ Service Notes

• Keep valves in order and fit each one to the seat it is lapped to; a new valve must be lapped in until a continuous, even contact band shows right round
• Check the guide for wear before fitting a new valve — a good valve in a worn guide will not seat or seal for long
• Clean the deposits from the port and seat, wash every trace of lapping paste out of the head, and lubricate the stem with clean engine oil on assembly
• Fit new stem seals and check installed spring height and valve recess against the figures in the workshop manual for your engine
• Set the valve clearances on assembly and re-check them after the first running period, following the procedure for your engine

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21026535 → Supersedes 22238944

OEM / Related Numbers

• 22238944 earlier number superseded by this part
• Inlet valve seat 20459852

Other-Brand OEM Numbers

• VOE21026535

📦 Condition

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