My injectors leaked more after o-rings too - Saab 900 Bulletin Board - Saabnet.com
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My injectors leaked more after o-rings too
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Posted by john_gonzo [Email] (more from john_gonzo) on Wed, 14 Jan 2009 09:41:24 Share Post by Email
In Reply to: Injector o-ring update, CBS [Profile/Gallery] , Wed, 14 Jan 2009 06:23:39
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Last month I had one injector leaking on a 1989 900S. After replacing the O-rings I had TWO leaking injectors. All leaks made spreading damp areas on the intake runners at idle.

It was easy to tell the leaks were NOT from the upper O-ring seal on the fuel rail. The fuel seemed to be wicking up onto the intake runners from near the lower O-ring seal. Removed all injectors. On the leakers, I could twist the lower metal cylindrical part of the injector while holding the injector body stationary. (That lower part was about the diameter of a pencil, the inside of it was cone shaped.)

That tells me it was the injector itself that was leaking. In fact, leaking lower O-rings (air seals) would allow air to enter alongside the injector and possibly draw the leaking fuel directly into the intake before it had a chance to dampen the exterior of the manifold. The new O-rings might have just revealed the real problem in all its glory.

Hope this info helps.

posted by 136.162.4...

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