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Discseven's Avatar
Join Date: Oct 2012
Location: Miami, FL USA
Posts: 3,575
3.2 Fuel rail measures if you have

Going to oder some plugs to seal 3.2 fuel rails for electroplating. Want to order these plugs now before pulling rails off the engine. Would appreciate it---if you have access to 3.2 rails---if you would please measure the fuel inlet, outlet, and fuel injection hole inside diameters for me. The fuel injection hole is the hole to the rail's chamber, not the cup's hole where the injector seats.

Much appreciated!

Karl ~~~

Current: '80 Silver Targa w /'85 3.2
Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver/Black/Anthracite 930s.
Old 09-28-2020, 11:43 AM
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BoxsterGT's Avatar
Join Date: May 2004
Location: New Hampshire
Posts: 5,103
Porsche Crest

Injector sockets on the 3.2 Fuel Rail are 14mm, actually 13.57mm on one I measured recently.

The threaded fittings are M16, whatever bore size they have.

The Standard DN08 Fuel Tube has a 10mm OD and a 8mm ID, but that is not the fitting ID.

This should give you a ballpark to buy rubber plugs.


Old 10-05-2020, 06:01 PM
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