Cylinder head retaining nut, Small head. Porsche 356 B / C 1960-69 / 912 › 61610438300

OE Match small-head retaining nut for the cylinder head assembly on Porsche 356 B / C and 912 models. 

Fits

• Porsche 356 B / C 1960-69
  
• Porsche 912 1965-69
  
  

Check fitment for your specific vehicle (model, year, engine) before ordering.

Diagram ref no: 21

What This Product Does

This nut forms part of the hardware securing the cylinder head. Its small-head specification distinguishes it from other retaining nuts used within the assembly, so the original fastener and its location should be checked before replacement.

Functions

• Provides retention at the specified cylinder head fastening position.
• Replaces the corresponding nut during cylinder head repairs or engine rebuilding.
  
  

Technical Details

• Brand: OE Match.
• Part reference: 61610438300.
• Version: small head.
  
  

Symptoms of Fault

Leaks, uneven compression or abnormal engine noise can justify inspection during cylinder head diagnosis, but these symptoms do not establish that a retaining nut is defective. Check the fastening hardware and associated components before deciding which parts require renewal.

Why Replacement Matters

During dismantling, inspect the nut, mating stud and supporting hardware for damage or wear. Renewing unsuitable fastening components while the head is accessible helps avoid reassembly with compromised hardware. Use the engine-specific workshop procedure for tightening sequence and torque; no tightening specification is supplied here.

FAQs

How should I confirm the correct version?
Compare reference 61610438300, the small-head configuration and the diagram position with the removed component.

Does this replace a complete cylinder head?
No. This product is retaining hardware, not a head, valve assembly or seal kit.