Engine Valves / Guides / Springs

Porsche 911 S / TU /T / E - 1965 to 1969
Porsche 914-6 - 1970 to 1976

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Diagram ref no 10

Porsche 911 S / TU /T / E - 1965 to 1969
Porsche 914-6 - 1970 to 1976

Click 'Zoom in' for Large parts diagram
Diagram ref no 9.

SET OF 12 valve guides - standard. Inlet x 6 and exhaust x 6.

This is the standard valve guide used in early air-cooled Porsche 911/930 cylinder heads. It’s a plain (non-hydraulic) guide that locates the valve stem in the head; when worn it causes oil burning, loss of compression and poor valve seating — so they’re commonly replaced whenever heads are rebuilt.

What the part is (technical data / dimensions)

Application: Porsche 911 / 930 from about 1965–1989 (varies slightly by model and year; early cars both intake & exhaust, later years sometimes exhaust only). Standard size (typical OE): ID ≈ 9.00 mm, OD ≈ 13.06 mm, length ≈ 51.2 mm.        

Fits:Porsche 911 1965-1968 2.0L / 912 SWB (F)Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)Porsche 911 1974-1977 2.7L / 1976-77 3.0 CarreraPorsche 911 1978-1983 3.0L / SCPorsche 911 1984-1986 3.2LPorsche 911 1987-1989 3.2L G50Porsche 911 1975-1977 3.0L Turbo (930)Porsche 911 1978-1989 3.3L Turbo (930)

Why these guides should be replaced

Valve guides are a wearing item. Replace them when any of the following occur or when you rebuild the engine head.Excessive valve stem play — worn guide ID internal diameter lets the valve rock and misalign with the seat , poor sealing, reduced compression and power.Oil consumption / smoking — worn guides allow oil to wick down the stem into the combustion chamber, causing blue/grey smoke and fouled plugs.Hard starting, rough idle, misfire — poor sealing / valve timing irregularities from misaligned valves.Valve wobble that leads to premature valve stem wear or valve seat damage — once stems or seats are damaged you need deeper surgery.If a guide is cracked, broken, or has excessive ovality — must be replaced.Whenever you remove and refinish seats / replace springs / do a full head rebuild — replacing guides at that time is cheap insurance and ensures correct alignment. 

Inner diameter 9,00 mm
Outer diameter 13,06 mm
Total Length 51,20 mm

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Diagram Ref No 2 and 2A.