CIS Fuel Distributor Rebuild

JB · 02-28-2006, 04:11 PM

Does anybody know of a company that rebuilds CIS fuel distributors? Has anyone done this themselves? I have a Euro SC fuel distributor with the piston seized. Any help would be appreciated.

JB

tab tanner · 02-28-2006, 04:58 PM

I took one apart years ago, you don't need to pull it apart if the piston is just stuck. Berrymans carb cleaner will almost always free it up. spray the piston are and let it soak for several hours and do it again. If you can grab ahold on the piston you can twist it back and forth to remove it. CLEAN IT VERY WELL, and don't drop it on the floor it can damage it.
If you cannot grab the piston try a using a blow gun with a rubber tip and force it out with air. Be careful not to shoot the piston across the shop. Ask me how I know about that??

JB · 02-28-2006, 08:37 PM

Thanks Tab,

This one is really stuck and pushed all the way in so I can't seem to get a grip on it.

Porschephd · 03-01-2006, 06:06 PM

You might get lucky and have it work, but more times than not it will not take care of all the issues. The heads do not like junk inside of them and you can bet that if the piston is stuck there is a lot of stuff in there.

Rex Walter · 03:48 PM

JB,

I took my fuel distributor completely apart, found all the O rings and crush washers at a local hydraulics store, cleaned it, and put it all back together.......never did work too well. I've been told that it is not a good idea to take these apart unless you know what you're doing. I ended up getting a rebuild from Special T Auto in Texas. It has worked great, right out of the box for years.

http://www.specialtauto.com/porsche-parts/index.html

Our host also sells some rebuilt units:

http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_FULcis_pg8.htm#item32

Rex

Jim Williams · 03-08-2006, 06:01 PM

Sometimes you can get lucky by spraying the Berrymans cleaner in the top of the fuel distributor, through the WUR hole. It'll be very slow trickling in, as the passage to the top of the piston is *very* small, like pinhole size. This is the place to put in the air pressure, but has been stated, point the piston at a pile of rags in something like a small plastic bucket. *If* it comes out, it may do so very quickly with a lot of inertia, and could either damage you and or the piston.

The piston could be stuck due to fuel varnish, if so the Berrymans might help, if it's due to trash or corrosion, it'll more than likely have to come apart.

Stackett · 03-15-2006, 06:51 AM

A friend of mine that owns a repair shop, has a setup that you connect the injector to and it sprays so cleaner through it. I had all six of mine cleaned and now they work great. I had to take my fuel distributor apart and clean all the fuel lines. It's a python from a 75 and have found all the parts needed except one shim gasket. I'm having that made because nobody carries it. I'll try and post some photos later today.