Injector leak ‘87 4.0
08-26-2022, 08:41 PM
#1
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Injector leak ‘87 4.0
I have a 1987 4.0 that gets very little use. I have changed the o-rings 3 times each time once completed everything is sealed and no detectable leak. I drive it a short distance about every 2 weeks. After about 6 to 8 weeks a leak starts. I have had it leak at the head, fuel rail and not injector specific. The last time the Rukse was the brand, before that GP. I am mechanically capable. I have used motor oil and silicone grease to lube things up. Quality of the o-rings? Condition of the fuel rail? Injectors warn to the point that the seal breaks?
Thanks BR
Thanks BR
08-27-2022, 08:19 AM
#2
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Leaking air or fuel?
The original injectors were prone to leaking fuel from the body.
The original injectors were prone to leaking fuel from the body.
08-27-2022, 09:08 AM
#4
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I have Renix fuel rails..
08-27-2022, 12:41 PM
#6
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Used $75 plus shipping.
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08-27-2022, 05:08 PM
#8
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I would.
09-04-2022, 12:10 PM
#9
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Installed rebuilt 746 injectors. These went in much easier then the original injectors. So far no leaks, but I have to give it some weeks before I will trust it.
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