How To Clean Injector Cup On 7.3

Injector cups are a very vital role of the internal workings of a Powerstroke diesel engine, whether information technology is a 6.0L or a 7.3L.  The injector cup seals the cooling system from the injector inside the cylinder head.  When the injector cup fails, you will no longer have a seal betwixt the fuel system and the coolant system.  Because of the higher force per unit area of the fuel system, the fuel goes into the coolant. This video addresses how to identify the trouble, how to diagnose the problem and how to repair the problem.

Indentifying the Problem

The number one indicator of a trouble with an injector cup is fuel in your coolant.  Commonly, fuel will overtake the cooling arrangement and button past the cap.  It is important to identify fuel in the cooling system early because the longer information technology stays in there, the more damage it does to all the rubber components of the cooling system. This bottle is cracked and broken down from the petroleum reacting with the plastic.  During your under-hood inspection, if you see your coolant canteen is overfilled or overflowing in any way, pop the coolant cap off and inspect information technology.  Oft, when you remove the cap from the truck, this seal will be deformed and expanded from reacting with the petroleum. This item truck came in with the coolant cap replaced because the rubber seal was all deformed from reacting with the petroleum.

Diagnosing the Problem

Once yous place that you have a trouble in your cooling system and there is fuel in the coolant, then it is fourth dimension to do some investigation.  This diagnostic procedure is fairly involved and requires a pump to pressurize the cooling organisation.  You lot are going to have to have the injectors out which requires removal of the valve covers, the valve cover gaskets, and all of your fuel injectors. While you have the injectors removed, now is a good time to replace the seals and check your glow plugs to make certain that they are all in working order.  Information technology will be easy enough to replace them all now while you take it apart.

With the valve covers are off and injectors removed, it is easy to see down into the injector cups with relative ease.  Some on the rider side past the air conditioning box can exist a little challenging but they tin can be washed.  It is actually important that you take some restriction cleaner and good clean towels (not fuzzy towels that volition get out fuzz inside this arrangement, skilful clean shop towels that take been used a flake and are done and nice, dry and clean) and clean the individual cups.

Use the pump, pressurize the cooling system, and watch the injector cups very closely in each of the viii cylinder holes to detect which ane has the leak.  With each hole clean and dry, it should be relatively easy to come across the coolant emerge.  With the arrangement pumped up, you tin can meet the coolant class and push downwardly into the cup.  Y'all accept to be very patient and keep the arrangement pressurized.  It is helpful to accept a friend pump the system while you lot are observing each individual cup.  The only way you are ever going to see this leak is if the loving cup is extremely clean and dry.  If you look very careful and take your time, you lot volition observe the injector cup that is leaking, or 2 or three.  In this particular situation, nosotros accept identified that the number 2 cylinder which happens to be an piece of cake cylinder is the one that is really leaking.  More often than not, nosotros recommend that you supercede all 8, only this particular customer does not have the time or inclination and does not want a warranty so nosotros are merely going to supervene upon the ane cup.

Parts and Tools

Now that yous know which cup(s) you lot are dealing with, order the injector cup(s). If you do not accept a Ford dealer that has i in stock, sometimes you tin become them from International, but you'll have to twist their arm to look information technology up for you lot because they don't like to sell parts for Fords.  Yous volition likewise need the removal tool and the installation/driver tool.  With the removal tool, you thread information technology down into the cup.  There is a puller that grabs the tiptop of the hole and extracts the cup from the hole.  The installation/driver tool is simple and straight frontward – Rock Historic period technology.  You lot put it downwards in the loving cup and bulldoze it in advisedly with a hammer.

Repairing the Problem

Depressurize the system and remove the pump.  Then crawl under the truck and bleed the coolant because in one case you lot go the cup loose, the coolant is going to drib right downward into the combustion chamber which we don't want to have happen.  In one case you accept the coolant out of the system, now is the time to thread in the extraction tool.  We are going to remove the exhaust side rocker arm and the front rocker arm so we accept visual admission.  It is not actually necessary for the extraction process, but when you lot kickoff working on some of the rear cylinders, it might exist a expert idea to go these rocker artillery out of the mode for ease of accessibility.

I am a real stickler about the parts coming off and going back in exactly the same spot.  Lodge of parts and how they went in is crucial as far every bit I am concerned.  If an engine has 100,000 miles on it, and that tip of that rocker arm has been working on the tip of that detail push rod for all these miles, then why am I going to go and mix it up with something else?  The article of clothing patterns accept established themselves and it merely seems to exist a good idea to brand sure that each part goes back together exactly as information technology came out.

Then this upper nut (12 point, ½ inch or 13 mm head) actually drives the tool downward into the cup.  Right at present, we are really threading the tool downwards into the loving cup.  It volition take 8 or 9 turns.  You don't want to push it when you lot get it to the bottom.  Don't stress it.  When it is bottomed, information technology is bottomed.  Once the tool is driven into the injector cup, the outer nut is tightened down against the retaining ring and this is how information technology gets pulled out.  You have to utilize a deep ¾ inch socket, 19 mm.  Out she comes.  It gives very hands.  Having the right tools goes a long way towards having a happy outcome.

At present that the injector loving cup is loose, information technology is just a affair of pulling the whole shebang right out.  Merely like playing operation when you were a kid.  Now that we accept it autonomously, it is credible that the injector cup has a long crack in it, probably caused by heat and materials, heating upwardly and cooling downward.  It will cause a stress fracture in the injector cup.  Now, get the hole that the injector loving cup goes into clean, clean, clean, make clean.  Y'all can't get it likewise clean and dry before nosotros install the injector cup.  There volition be some residual mucilage in the hole.  It is absolutely imperative for all of that stuff to get cleaned out of there using whatever tools are necessary to do then.  Information technology will take more than just wiping around in at that place with some damp rag to become this clean.  The cup has to seal against a make clean, dry surface in club for this to be a successful repair.  A little wire brush like you apply for cleaning solder off of cooper pipes works really good to reach downwards in in that location and clean that hole out.  You might get a little debris within the cooling system, but nosotros are going to have to affluent all this nasty mess out of there anyway.  Now you are going to have to make clean and make clean and clean, restriction cleaner, towels, whatever it takes to get that space clean.  I cannot over stress this.  Once you get information technology all nice and cleaned out, put some air downwardly in there and blow all the residual pieces out.  Watch your eyes.  Don't let information technology blow back into your eyes.  If that brake cleaner gets in your eyes, it will sting similar a son of a gun.

We are going to use Permatex Threadlocker Green to seal this loving cup.  Slide the cup onto the installation tool.  You volition detect a rubber o-band on the installation tool.  It is crucial that the o-ring is there, because that is what holds the cup on at that place when you turn information technology upside down.  You will exist pointing downhill with this and you need the o-ring to hold information technology on in that location.  Brand sure the cup itself is dry and clean using brake cleaner and so that our sealer volition really seal like it is suppose to.  Take a piddling bit of seal using a pigment brush or swab and put information technology on the surfaces within the caput where the cup makes contact.  The loving cup makes contact down at the very bottom and effectually the very peak.  Those are the but places that make contact.

The idea of the contumely cup is to keep the injector cool.  Brass is used considering it transfers heat the all-time.   The tip of the injector is right in the middle of the fire and keeping them cool is the key to having them last.  Fix fourth dimension on the Threadlocker is fairly quick.  Y'all have to become it on at that place and get it knocked in the pigsty fairly quick.

You lot don't need the biggest hammer you own to do this; a lite tap is all you need until she bottoms out.   You volition feel and hear it once it sets.  Now you can pull the installation tool out and your injector cup is installed.  Make sure you put the cap back on the Threadlocker and so you have it next fourth dimension.  If you lot don't put the cap back on this stuff, information technology will harden inside within 24 hours.

This is what a prissy new clean injector cup looks similar installed in your cylinder head.  I like to get the injector overnice and clean with new seals and installed every bit quickly every bit possible so it will hold the cup in place while the sealer is curing.  Once information technology is in at that place, even if you lot hustled it up, it will still be a couple hours until you lot are going to get-go the engine, which is plenty of time for the Threadlocker to seal.

With the truck back together, you are going to have supersede hoses, and possibly h2o pump, thermostat, and all of the safety seals that have been affected in the cooling system.  How long the fuel was in the coolant will determine how much impairment was done to the cooling organisation.  I have seen some where we have had to put water pump, radiator, heater core, all the hoses, thermostat, because the problem had been there for a very long time.

In this state of affairs, having the correct tools is absolutely crucial.  These are available on the internet.  I believe Snap-on tin guild them.  It is near $500 worth of tools to make this happen, but to practise it correct the get-go time, that is what it requires. ~Bill Hewitt

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Source: https://powerstrokehelp.com/injector-cup-failure-in-powerstroke/

Posted by: thielcarsed.blogspot.com

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