![]() ![]() ![]() Offensive comments will result in a warning. Pictures should be hosted on reputable sites (imgur, Photobucket, truck sites such as Diesel Power).ģ. These will surely be revised as time goes on but for now here are some simple rules:Ģ. I wish I could say there are no rules here but we can't live on Reddit without them. First thing to remember is there are no rules." "For those of you who have never done this before, I think I better go over the rules. Our manuals contain in-depth procedures that require screen shots of parts, charts and various graphs - as well as detailed steps that guide you through troubleshooting real-world automotive repair issues methodically for a quicker resolution.įor additional information on how to obtain the manuals that these tips come from, please refer to the products page on our website: - where you will also find trouble code handbooks for various manufacturers.Welcome to the home of all things related to International/Ford diesel engines!Ĭheck out these other great diesel/truck communities: These excerpts are from our 200-350 page manuals and may possibly refer to information from other sections of the manual or graphics / pictures. Note: Most other low oil pressure system faults are discussed under the Low Pressure Oil System articles that follow because they’re more related to injection oil pressure than engine mechanical. This also contributes to reservoir screen clogging, screen damage, and then HPOP failures. That’s why Powerstrokes that don’t have the oil changed regularly tend to suffer so much mechanical damage. As the filter clogs, the restriction increases, and more of the oil ends up bypassing the filter. That’s why there is a relief valve in the stand pipe in the oil filter housing. The 6.0L Powerstroke can flow 16 gallons of oil per minute, so any restriction in the system can really back up the system. This is sometimes misdiagnosed as a front main seal leak. Occasionally the CMP sensor o-ring will fail and cause a leak near the front of the engine. The 6.0L has many more places to leak from than a conventional engine, but the most common leak is into the intake valley, and it’s caused by a failed oil cooler cover gasket. Other leaks are caused by high pressure system faults, and are discussed in those articles. If there are no combustion gases in the cooling system, the oil cooler is clogged. The fault could still be a blown head gasket, but you can test for that using conventional tools (monitoring pressure in the reservoir with a transducer, or using exhaust gas detection fluid testers). If the EOT value is more than 15 ✯ hotter than the ECT at any time during the test, there is a problem. When the accelerator pedal is released, record the EOT and ECT values (or use the Scan Tool graphing function. No heater operation (passenger compartment)ĪTG TIP: To find a restricted oil cooler, warm up the engine and then monitor the ECT and EOT PIDs on the Scan Tool during a WOT event.Head gasket or other internal engine leak (as a symptom, not a root cause). ![]() Symptoms associated with a clogged oil cooler tend to be worse under load, and include: TSB 09-8-3 addresses this concern, and contains procedures for eliminating other possible causes before replacing the oil cooler. A cooler restriction also contributes to EGR cooler faults. This may also cause some localized boiling in the coolant, which will show up at the coolant reservoir, and may cause actual engine damage. This causes a low oil supply to the reservoir, which results in low high-side pressure and a no-start. The oil cooler in the intake valley can become clogged. Debris is generally caused by poor maintenance, so it’s usually the cause of other damage, not the result. Reservoir screen damage is also considered a low pressure oil system fault, though it’s caused by the suction of the high pressure system. The screen gets clogged and the suction pulls the screen apart. The screen at the bottom of the reservoir is there to strain out debris as it’s sucked into the HPOP. Most other low pressure oil faults have to do with one of the relief or check valves in the oil filter housing, as described under the Oil Filter & Related Components articles earlier in this section. Pressure & Volume FaultsĪs stated previously, the oil pumps usually only fail when lifter needle bearings get into them. Any resulting high pressure symptoms are discussed under the Common Oil Pressure Faults article later in this section. Low oil pressure faults tend to become high pressure faults as well, but the issues discussed below start out as low pressure faults. 45 PSI is considered a good warm idle value, so even though it’s much lower than the maximum, oil is still bypassing both the 20 PSI and 25 PSI bypass valves. Only the 70 PSI valve actually bleeds off pressure, so this is the highest you’ll see it go. While there are 20 PSI and 25 PSI valves in the low pressure system, these are bypass valves, not relief valves. ![]()
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