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On 1 Jul 2004 at 22:38, Steven Cooper wrote: > Since then I seem to have aquired 8 used Bosch injectors, it would be great > if you had a "how to" describing reconditioning them. If I could do the > work myself, it would be viable to keep a set as spares and offer a set for > sale. Is it the type of thing you can do with out specialist tools? > Normally I would just pull one apart to see how it works, but I'm guessing > that injectors are a bit more precise an delicate than your average > component. Unfortunately, the only thing you can take apart (and still hope to put back together) is the little hose on the back end. If you've already done this and the injector still leaks, then replacement is your only option. I have a couple of injectors that I have cut apart just to see what is inside. I will bring these to the 04 invasion, just as I did in Parma. Replacing that hose is pretty simple and all you need is a bench grinder or a vise and a hacksaw. You just have to cut thru the crimp ferrule without cutting into the hose barb underneath. Once the old hose and ferrule are off you can just replace them with commonly available stuff. The biggest problem is that new injectors come sealed with a rust preventative on them. Once they are used with gasoline that rust preventative is washed away and the protection is gone. They will not rust as long as they have gas in them, but if they are allowed to dry out for a long time rust will occur. Rust in some places will be harmless while in other places it may cause leaks or poor fuel metering. Either of the latter can make the injectors unusable. Drying out can also cause shrinkage of the O-rings, but this is reversible if they are allowed to soak in gas again. Used injector are often a problem. They get left somewhere in a corner with the assumption that they are good because they worked fine when they were taken out. But, while new injectors seem to have an unlimited shelf life, used injectors will often become unusable in storage. This is the main reason that I object to the automatic replacement of complete sets of injectors. In an attempt to find a way to store used injectors so that they will survive, I recently took a bunch of them and cleaned them up, removed all the old hoses, and they are now stored in a container full of kerosene. I hope thie works. The moral is that you should not assume that you can just keep old injectors as spares, unless you do something special to keep them from degrading. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org