Washer for cylinder head nut. Porsche 911 65-77 / 914-6  ❭  99903108302

Washer for cylinder head nut
This OE Match washer for the cylinder head nut is a replacement engine fastening washer for Porsche 911 models from 1965 to 1977 and Porsche 914-6 models. It is designed to match the original-style fitment and support correct cylinder head nut clamping.
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Fits:
Porsche 911 1965 - 1977
Porsche 930 Turbo 1975 - 1977
Porsche 914-6 

Diagram ref no 17

The washer sits beneath the cylinder head nut and helps distribute the clamping load evenly across the mounting surface. This supports correct fastening of the cylinder head assembly and helps protect the mating surfaces from damage during tightening.

Functions
•  Fits beneath the cylinder head nut
•  Helps distribute cylinder head nut clamping force
•  Supports correct cylinder head fastening
•  Helps protect the mounting surface from nut damage
•  Replaces worn, missing, corroded, or damaged original washers
•  Suitable for engine rebuilds, cylinder head work, and top-end servicing
•  OE Match replacement for classic Porsche engine repair.

Why Replace This Part?
Cylinder head nut washers can become worn, distorted, corroded, marked, or damaged during removal and refitting. Reusing damaged washers can affect clamping consistency or damage the mounting face. Replacing the washer during cylinder head service or engine rebuild helps ensure the fastener seats correctly and supports reliable engine assembly.

When to Replace This Part
•   The cylinder head nuts have been removed
•   The original washer is missing, worn, corroded, or distorted
•   The washer face is marked, damaged, or no longer flat
•   Cylinder head work or top-end engine service is being carried out
•   The engine is being rebuilt or restored
•   Correct fastening hardware is required for an OE-style rebuild
•   Preventative replacement is being carried out during engine assembly.

Where it fits on the car
This washer fits in the engine cylinder head fastening assembly, positioned beneath the cylinder head nut on Porsche 911 and 914-6 models.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99903108302

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