Jan 19, 2013 #15 Diezel Dawg New member. Sleeves can also allow coolant or oil to enter the cylinder. The fuel injector body at the top of the fuel injector. (Not repairable Discard fuel Injector) Test leaking Fuel Injectors. Fuel injector leak testing should be done under operating pressure. This is because the fuel rail pressure has dropped and fuel has leaked into the manifold and causes the spark plugs to become flooded. Both top feed and side fuel injectors make use of O-rings to seal between the fuel injector and fuel rail. A cracked sleeve in some engines can allow fuel to enter the cooling system. yes there is chromed steel tubes they sit in as the border between the crankcase and the injector as such,, if leaking diesel chances are the injector is cracked or where the injector two parts fit together the seal as broken or in has come loose, either way best option change the injector,, another leak place is around top where electromagnet sits, once again replace or get As it is Sunday afternoon and the stores were closed, I figured it wouldn't hurt to try Install puller stud (221-9778) into threads of electronic unit injector sleeve. 5. 24 Feb 2003. This information should be considered anytime the cylinder head is being worked on. 7. Additionally injector sleeve failure may cause coolant to be found around the base of the fuel injector in the cylinder head. Not saying cups don't leak, but I seldom see it especially just out of the blue. I can't see anything fuel related leaking like that and still looking like oil. 3). Dick : Reply: Tony : 18-Feb-01 : Diesel Leaks are notorious to find. 6. 15,846. tyce said: I have an exhaust leak on my VP 2003 from No1 Injector which i am guessing means the injector sleeve probably needs changing. More often than not it is a head gasket UNLESS someone just did an injector job or had it apart for other reasons. Leaky injector, need some advice - Technical IH Talk - Red Injector Cups Leaking. Best solution is to clean area thourougly and dry the area. Reply. Hi Guys, installing rings in the injector sleeves To stop coolant leakLongHaul Larry P.O. Sometimes they are already loose and leaking. The repair option described below is notfor components in warranty Service O-ring, Part Number 5440257, can be used to replace the lowest green injector o-ring, Part Number 3347937, as an optional repair. Cylinder Head & Injector Sleeve Detail Lubricate the upper O-rings on the new fuel injector sleeve with P-80. And why they leak. It probably is oil. Over pressurizing the system with no injector installed could force a leak that isn't normally leaking, so be careful. In this particular situation, we have identified that the number 2 cylinder which happens to be an easy cylinder is the one that is actually leaking. Any coolant leaking from the top of the sleeve (in area you point to) down into the lower sleeve will show on the lower part of the injector. TechSmart Brass Fuel Injector Sleeve. So for those people who wanted to tackle this job in situ, follow these: 1). More than 10 years. Mar 22, 2012. The sleeve also separates the fuel injector from the cooling channels in the head. Before installing the new injector sleeves, clean them and the cylinder head with a fast drying alcohol cleaning agent. When I got home I found that the metal sleeve from the fuel line going into the injector on #8 had a small leak at the base. Fuel leak will stain paint yellowish color,making it easy to find. If your engine is making oil that will confirm a leaking injector. Box 92 St.Cloud, WI. M11 are known for leaking between the head and rocker box housing. The replacement of the lowest injector o-ring mustbe completed on all injectors. If you Information on proper sleeve installation is not included with the packaging of a new injector sleeves, follow the illustrations and steps listed below. What Isuzu 4JX1 injector sleeves look like? I determined it be a water injection leakage as the water was leaking from the upper left corner when I pulled off the top cover. No idea is this particular engine is a dry sleeve or wet sleeve motor --AKfish if you have some carbon around a injector look for a leak. May need new sleeve. The sleeves can cause different problems with the engine depending on what is wrong with the sleeve. Place puller stud and electronic unit injector sleeve in cylinder head. instruction on repairing a leaking injector sleeve using service tool, Part Number 5394735, and retaining ring, Part Number 4312298. **If it is a bad oil O ring, you will see oil coming out from around the injector, and it will be much more so than the others that are seated fine and have good O Also, the injectors were to be replaced due to the coolant and age. Even had an instance where an injector wasn't seated properly, and combustion gas pressurized the fuel tank, via the fuel return. A leaking injector sleeve on a 6.0L can result in compression pressure building in the cooling system and/or coolant making it's way into one or more cylinders (other possible causes are head gasket or EGR cooler failure). Thread starter SMOKEY; Start date Jan 16, 2013; Jan 16, 2013 #1 SMOKEY New member. Following a previous site visit, it was noticed that some of the injector sleeves in the clients MTU 16v4000 engine had been leaking coolant into the cylinders and around the injectors. Do Not damage "O" ring seals on electronic unit injector sleeve. To install electronic unit injector sleeve in cylinder head, use a hammer and Driver Cap (9U-7258). found to have leaking injector sleeves, the cylinder head mustbe replaced. Leaking fuel injector can be the cause of hard starting. Messages. Leaking injector cups usually lead to fuel in the coolant, or coolant in the oil. On some engines, a sleeve leaking on the top end of the sleeve can cause an external coolant leak. The injector seals against the head not the cups to stop the combustion gasses. Probably not a bad idea to have a look see back underneath the valve covers. The 3126B HEUI injector does not touch the stainless steel sleeve and seats directly on the cylinder head. 4. We generally do a Lubricate the new O-Rings with liquid soap. If leaking injector sleeve is root cause of coolant or fuel cross-contamination, install retaining ring, Part Number 4312298 in all six injector sleeves. See Service Instructions and Service Parts Availability Sections below. Even if only one injector sleeve is found leaking, retaining rings must be installed in all six injector sleeves. Joined May 18, 2011 Messages 1,363 Reaction score 0 Location Injectors sleeves occasionally come out when you pull an injector. Disconnect the fuel line to the fuel injector and leave the injector on. 2). Before installing new injector sleeves, thoroughly clean the injector sleeves with the 4C-5552 large bore brush. The fuel injector sleeve seals the fuel injector in the cylinder head and protects it from debris. 3.0 diesel 4JX1 new head, visit us at www.cylinderheadsupplies.co.nz Align the hole on side of fuel injector sleeve with hole in cylinder head for high-pressure connector and then place new fuel injector sleeve into injector port in cylinder head. 5. found to have leaking injector sleeves, the cylinder head mustbe replaced. Kevin nozzle sleeve (C). injector. The repair option described below is notfor components in warranty Service O-ring, Part Number 5440257, can be used to replace the lowest green injector o-ring, Part Number 3347937, as an optional repair. A leaking fuel injector or injectors are normally the cause for difficult or hard to start engines especially when they are warm. On closer inspection the water was coming out of the mounting sleeve ( WP22213057) from the side openings. When 3126B sleeve seals and 3116/3126 sleeves leak, the engine will have fuel in the cooling system. This is because the fuel rail pressure has dropped and fuel has leaked into the manifold and causes the spark plugs to become flooded. Joined Oct 2, 2011 Messages 88 Reaction score 0 Are you guys useing loctite sleeve retainer or just normal threadlocker? If they are not reinstalled with NEW seals and properly, they will leak coolant into the exhaust. Dec 7, 2009. However, coolant seeping up around the injector says to me that either the head gasket is leaking or the head is cracked, or the block is cracked (dry sleeve cylinder engine type), or the cylinder sleeve is pitted through or cracked (wet sleeve cylinder engine type). Apply Loctite compound 515 to the bottom O-ring 3. you will find the injector cup that is leaking, or two or three. If the injector hold down bolts are stretched, the injector can't seat properly, and combustion gas can get to the o-rings. Injector cups are a very vital part of the internal workings of a Powerstroke diesel engine, whether it is a 6.0L or a 7.3L. 4. 2. Find out if the sleeve slides out when you pull out the injector. Come to think of it, I have a set of Dmax heads at the shop now that are off a destroied engine, I'll check them out and see what the correlation is with coolant in the exhaust. Once in, the injector helps to hold the sleeve down in place. I want to do it myself as i dont want the cylinder head lying around in some Volvo Penta dealers workshop for weeks wasting the summer while some one gets around to doing it. Alright so I just drove from Kansas to Arizona and during the trip I started to smell more of a diesel smell in the cab and also when I would stop and fuel. The lower sealing surface should be smooth and free of any surface pitting. sleeve installation. The MUI injector seats on the brass sleeve and there is a pressing tool to seat the injector in the sleeve to seal compression. The sleeves are fitted with various special seals and you need special tools to press fit them properly. Do not use any petroleum based products to lubricate fuel injector sleeve O-Rings or the O-Rings will swell excessively. 4. 1. Set fuel injection nozzle sleeve (C) over bore and place A leaking injector sleeve on a 6.0L can result in compression pressure building in the cooling system and/or coolant making it's way into one or more cylinders (other possible causes are head gasket or EGR cooler failure). Additionally injector sleeve failure may cause coolant to be found around the base of the fuel injector in the cylinder head. Figure 1. 40ish old machine. 3. The AERA Technical Committee offers the following information regarding injector sleeve installation on 2004-2017 Caterpillar C7 diesel engines. It was recommended that these were removed and replaced if needed with new seals. If the seal between the sleeve and the cyl head is compromised at all the compression can escape the cylinders and enter the cooling system flowing all around each sleeve. Service Parts Availability Cummins warranty will reimburse an authorized repair location once for the purchase of the installation tool, Part Number 5394735, to support a warrantable injector sleeve repair.
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