How do 6.0 powerstroke injectors work

This is commonly referred to as the high pressure oil pump HPOP. Navistar moved the injectors from their original location and placed them under the valve covers, replacing them with an electronic style that gave them a better position in the combustion chamber.

The HPOP delivers high pressure oil that is used to activate the injectors. This is where the term HEUI hydraulic electronic unit injectors comes from. In the 7. The HPOP then takes the oil received from the crankcase and pumps it back out under extremely high pressures , psi through hoses that go to top of the right and left side cylinder heads. The barrel in the cylinder heads is serviceable and can be accessed through these plugs.

However, these plugs have O-rings that can leak over a period of time. Keep in mind that the O-ring is not sold separately, it is only available as a new plug assembly. When the high-pressure oil enters the barrel of the cylinder heads there are passages that lead from the barrel to each injector. The fuel then enters a chamber in each injector. So now the stage is set for fuel to enter the combustion chamber. We have oil that has entered the cylinder head from the HPOP surrounding the injectors in each cylinder bank.

We also have fuel that has been supplied to each injector through the fuel galley of the cylinder head via the fuel pump. This tool is used on both sides of the stainless steel braided oil line.

Do not use excessive force as it may damage the fitting. When the apparatus is released properly, the fitting will separate with a light tug. It may help to push the fitting inwards lightly, then move the tool up and down slightly until it releases. It's a very simple process once you've done it a few times. A short Torx bit will be required to reach all hardware for the passenger side oil rail as there is minimal clearance between the rail and heater core.

With the standpipe out of the way let the oil rail drain into the top of the cylinder head, then set aside in a clean location.

OTC is designed to release these connectors, but a 19 mm 12 pt socket will also work it must be a 12 point socket. Simply press the open end of the socket over the connector clips to disengage, then pull the connector through the cylinder head.

These can be stubborn and some force is required to release the connectors. Do NOT force the connector or attempt to pry it loose - plastic pieces may fall into the cylinder head if the connector breaks. The original Ford workshop manual calls for a 19 mm 12 pt socket to accomplish this task, but the OTC tool also works well. It works best to acquire an extra long 2. If it has not, use a small pick to retrieve it from the injector cup. Slide the fuel injector into the injector cup in the cylinder head and start the Torx retaining bolt by hand.

It will snap into place when it is fully seated. With relatively simple maintenance, you can expect many miles of efficient driving performance from your truck. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email.

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Email required Address never made public. From there, the intensifier piston forces the plunger beneath it downward, and fuel is ultimately sprayed out of the injector nozzle and distributed in-cylinder. Over time, the varnish, sludge and carbon buildup left behind on the spool valve from engine oil can lead to friction. This is stiction at work. Stiction typically reveals itself in the form of rough, hard starts, excessive smoke upon start-up, a choppy idle until warm, and failed cylinder contribution tests.

This is why running a quality engine oil, as well as a stiction-fighting oil additive, is so important. Especially for 6. The 5W synthetic oil from Amsoil shown above retains its viscosity even during extreme temperature operation. It also resists oxidation and the thickening effects of soot contamination. Once again, choose a quality engine oil for your 6. While there is a point of no return with spool valve wear, in which the injectors will need to be replaced, many times stiction issues can be solved with the use of select oil additives.

Each additive removes varnish and carbon build up from the spool valves and leaves a super-lubricant coating behind, making for friction-free surfaces on the spool valve. This includes your piston rings, bearings, low and high-pressure oil pumps, turbo, everything.