21456429 Push Rod | Genuine Volvo Penta Part

🔧 Product Description

A hardened valve-train push rod transferring camshaft and tappet movement to the rocker-arm assembly.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD750GE
• Volvo Penta TAD751GE

• Engine Family: TAD

⚙️ Key Features

• Precision-length valve push rod
• Hardened contact ends
• Replaces earlier push rod 20405534
• Maintains correct valve-train geometry
• Suitable for continuous industrial-engine operation
• Quantity varies by assembly, most commonly 12

🔌 Function

The push rod transfers motion from the cam follower to the rocker arm, opening the corresponding valve at the correct time.

⚠️ Common Signs of Failure

• Bent push rod
• Incorrect valve clearance
• Reduced cylinder compression
• Worn or pitted ends
• Misfire caused by reduced valve lift

🛠️ Service Notes

• Check every pushrod for straightness by rolling it on a known flat surface, and inspect both ends for wear, pitting, scuffing or heat discoloration
• A worn or bent pushrod is a symptom — check the rocker, the tappet or lifter and the valve itself before fitting new, or the new rod will go the same way
• Never try to straighten or reuse a bent pushrod, and never shorten or modify one
• Confirm each rod is properly seated in its tappet and in the rocker socket, with the ends oiled on assembly, before any rocker fastener is tightened
• Set the valve clearances and tighten the rocker gear to the procedure and figures given in the workshop manual for your engine, then turn the engine over by hand to confirm everything is free

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21456429 → Supersedes 20405534

OEM / Related Numbers

• 20405534 earlier number superseded by this part

📦 Condition

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