Poorly Installed Injectors.
#17
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Honestly the pintle caps and o-rings wouldn't bother me too much. Yes you should get them sorted out properly, but it's not a huge deal. I would be more concerned as to why the pins on the diagnostic connector have been moved around. That would be a little disconcerting because it suggests that the last person to work on the car had the right amount of knowledge to be a danger. I can't imagine any good reason to move the diagnostic pins around.
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its a good idea to lube the O rings i like to use the Dow Corning 111 non setting silicone sealant , it makes for easy removal and keeps the rubber soft
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Bill,
I don't know about the 4-hole injectors, but the "disk injectors" we installed in my car didn't have
"protective caps". So I don't think the caps are necessary to keep the o-rings on.
I don't know about the 4-hole injectors, but the "disk injectors" we installed in my car didn't have
"protective caps". So I don't think the caps are necessary to keep the o-rings on.
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They are with the Bosche injectors. The lower o-ring and spacer just fall off the injector if the pintle cap is removed.
#23
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Brian,
The O ring dimensions emulate those in the standard Bosch kit.
You measured your O rings at circa 16.5mm - were these new O rings or old?
Would the extra 20 thou make that much of a difference?
Roger
The O ring dimensions emulate those in the standard Bosch kit.
You measured your O rings at circa 16.5mm - were these new O rings or old?
Would the extra 20 thou make that much of a difference?
Roger
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
![thumbsup](https://rennlist.com/forums/graemlins/bigok.gif)
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
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#25
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The ones I measured were OLD...well not that old, but they were 4 years & 14k miles old...... But I thought the O rings swell with age.....or is it the other way around and they shrink?
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Brian,
I was just interested and you may be right that they swell. I do not know if Viton swells or not. I do know that it is very compatible with gas. Maybe someone else can comment?
Roger
I was just interested and you may be right that they swell. I do not know if Viton swells or not. I do know that it is very compatible with gas. Maybe someone else can comment?
Roger
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We gotter fixed today. New idle stabilizer, fixed vacuum leaks, fixed bad injector plugs. SMOOTH IDLE. The owner says it has never run this good. We had a few mishaps along the way and crunched a few injested pintle caps, but it runs very well now.