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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 12-16-2012
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? during intake gasket job

hey all doing a upper and lower intake manifold gasket job on my 98 4.0. Two main questions right now. First, is what did those of u who has done this before do about the fuel rail gasket. In the gasket kits i got, I got a think gasket, and i got a think gasket that has silicone rings on it. the oe gasket is a think gasket with silicone rings. Can I reuse the oe gasket? looks just fine. Second, when i pulled the fuel rail, one of the bottoms of the injector fell off and went into the engine somewhere. I was unable to locate it when i took off the lower intake. Is this going to kill my engine? Im talking about the little cap like thing below the bottom o ring. Also is this going to mess up that injector if i dont have that cap?
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Old 12-17-2012
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The injector cap is a problem, it will probably cause that cylinder to misfire. Same thing happened to a buddies 5.4 f150. It fired up fine with the cap inside but it misfired.
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Old 12-17-2012
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Can u buy that little cap thing or will I have to buy a new injector?
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Old 12-18-2012
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new injector. you really need to get it out. if anything falls into the cylinder while doing the job you are asking for a problem
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Old 12-18-2012
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roger that, im hoping an oil change will take care of it. hopefully it comes out with the oil change. will get a new injector
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Old 12-18-2012
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The combustion chamber and the crankcase are separated by the piston...you will need to look in the intake port of the head and possibly through the spark plug hole to get it out
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Old 12-18-2012
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Quote:
Originally Posted by Toreador4x4 View Post
The combustion chamber and the crankcase are separated by the piston...you will need to look in the intake port of the head and possibly through the spark plug hole to get it out
Yup and if you cant do it that way, pull the whole head.
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Old 12-18-2012
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so what u guys are saying is it should be sitting on top of the piston?
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Old 12-18-2012
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If it fell through the injector hole, yes.
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Old 12-19-2012
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OK I guess ill try
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Old 12-19-2012
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yes it will not be able to go anywhere else. if you start or crank the engine with anything in there it can bend or damage a valve, crack the head or the piston. might even break a hole in the piston
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Old 12-19-2012
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Got it out. Found in my shop vacation as I was cleaning up around the intake
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Old 12-20-2012
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thats a relief
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Old 12-20-2012
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not such a relief that the truck is pouring out oil from somewhere now.
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Old 12-21-2012
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that sucks
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Old 12-31-2012
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tore it back down again and realized i had missed a couple pieces of gasket stuck on the outside part of the head, causing my leak, all is well now.
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Old 05-27-2013
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Thanks, guys. I had the exact same thing happen last night. The circular piece that holds the o-ring on came off when I was replacing the o-rings. I put it back on, but while trying to get the fuel rail seated, I noticed that it had come off again, and it has to be in the cylinder. I stopped there, suspecting I needed a new injector. Thanks for confirming.
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