| Low Oil Pressure |
| 10-30-2026, (Subject: Low Oil Pressure ) Post: #10 | |||
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RE: Low Oil Pressure (10-30-2026 )Carl Riederer Wrote:(10-30-2026 )tree98 Wrote: These engines demandated? That would explain your valve seat problems with heads. The problem isn't that they are demandated, its that they are likely programmed horribly and that's why your seeing those premature failures. Have you ever had Rawze look at one of those programs for you? | |||
| 10-30-2026, (Subject: Low Oil Pressure ) Post: #11 | |||
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| RE: Low Oil Pressure I highly reccommend to read the following posts: https://rawze.com/forums/showthread.php?tid=27 https://rawze.com/forums/showthread.php?tid=10576 Also keep in mind that this logic is not only limited to red engines, almost every single engine has the same PID logic, all emissions engines have operating modes and so on. There is no magic AI or fairies in ECM trying to keep things under control. There is a reason why aftermarket engine parts are not praised upon here, since they do not last nowhere as long as genuine and therefore end up with costly downtime, costly failures and will cost way more in the long run then going the genuine parts route. While working with engines you have to do everything right the FIRST time, else the whole work is wasted, lots of parts is wasted and things still have to be done the right way. This forum is not sponsored by red engine manufacturer, or any truck manufacturer or any parts manufacturer. | |||
(Online)| 10-30-2026, (Subject: Low Oil Pressure ) Post: #12 | |||
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RE: Low Oil Pressure (10-29-2026 )Carl Riederer Wrote: 2019 X15 This truck had oil pressure issues in the past. Had to change the oil filter at about 10,000 miles to make it to the oil change. Put a new oil pump in it and that didn't fix it. Did an overhaul and the oil pressure came up and could go a full service without having to replace the oil filter mid-way. Just over a year later it spun a rod bearing. Pulled the engine out and did a full rebuild. Sent the block to a machine shop to be cleaned and checked. We also blew all the ports out. Installed a new crankshaft from {after-market}. One new rod, new head, both gears and hubs in the front, oil pump, oil cooler, oil thermostat, and overhaul kit. When the truck is up to full operating temp the oil pressure will drop to 12psi at idle. Checked with a manual gauge and it is reading correctly. Installed a new set of bearings from Cummins, another oil pump from Cummins and tried one from {after-market}. Installed new piston nozzles from Cummins. Ran it with the valve cover off nothing leaking on the top end. Replaced the oil filter again and the relief valve in the filter head. The oil filter is a filter that we use on other X15s with no issues, so not the brand of filter. Double checked the engine serial #, overhaul kit #, oil pump #, bearing #s, and the piston cooler #s. Checked the oil pickup tube. Can not find the issue. That is a whole lot to unpack there.. your dancing around several subjects, etc... as if they were all the same issue, and their not. I have to split your post apart just to try to address all of this... first... (10-29-2026 )Carl Riederer Wrote: ... THIS IS NOT an oil issue!. It is a symptom of other problems... This is a VERY common issue that is seen on ISX's ... where you put new oil filter on, replace oil etc. and pressure is good and then drops off and gets worse and worse as time goes on between oil changes. - It seems to come back to normal with a new filter and/or oil change. - This is a very well known ISX / cummins issue!. It has nothing at all to do with the oil pump, filters, or anything else oil related. ... and for some moron of a mechanic telling you that you have to inframe it and/or they start throwing oil-related parts at the engine, this is someone who is under educated on how the ISX's work. -- THE PROBLEM is that the FILTER is getting actually clogged up too rapidly!. It is the oil itself that is the issue and is always black, and nasty, and smells somewhat like soot when you rub a sample on it between your fingers. It is something (almost always excessive soot) getting into the oil itself that is the cause.. not the pump, etc. This is ALWAYS caused by excessive soot getting into the oil system due to the engine running less than optimal and making far too much soot, and sometimes black smoke at the tail pipe if it gets bad enough. (non deleted trucks)... - The EGR system is the most common culprit, dumping in too much EGR gas into the intake due to soot-packed sensors not reading correctly,. but never throwing a fault. It is like a runaway-train effect,.. because of engine soot-coated EGR and intake sensors, and its a sign of complete maintenance neglect of the intake, sensors, regular yearly cleaning of the intake and EGR systems, etc. (deleted and/or not deleted trucks)... A partially clogged up exhaust all the time due to neglect of the aftertreatment systems, or improper "delete" programming making the fuel air mix too rich all the time,. etc.etc.etc.. it is a combustion problem.. not an oil related component problem. It can be other issues like CAC bad, and/or other air or exhaust clogged related issues, causing the engine not to breathe properly. I.E.> Excess soot getting into the oil system and clogging the filters up is what causes oil pressure to fall off exactly like you described. - Have seen plenty of ISX's do this where the filter starts clogging in as few as every 3,000 miles or so and the pressure starts dropping off. this is VERY harmful to the engine and its lifespan... and soot in the oil is very abrasive. (10-29-2026 )Carl Riederer Wrote: ... - Whoever rebuilt it had no clue what they were doing. This ... unless you ran it out of oil (or kept driving it on low pressures like a fool) .. or kept neglecting the excessive soot issue. - Take your pick. Personally, I am leaning hard on under trained mechanic + garbage-can after-maggot parts (plus the clueless mechanic) at this point, considering what you said above. The most common cause of a spun bearing is that some idiot installed after-garbage bearings and did NOT plastiguage EVERY DAMN ONE OF THEM INDIVIDUALLY to ensure proper clearance.. OR ... used OEM bearings and did NOT take note of every clam shell that came out of it and missed the fact that one lobe (or more) could have been an alternate size right from the factory. info: https://rawze.com/forums/showthread.php?...5#pid32065 (10-29-2026 )Carl Riederer Wrote: ... Again... poorly-educated mechanic who does not know enough about the ISX's, aside from being dangerous. This is a DIFFERENT oil pressure loss issue than the one you describing that you initially had before anyone dug inside the engine the first time. Low oil pressure after an inframe can only be a few things.. assuming ALL oem certified internals. - With after-garbage parts however.. its anyone's guess... so I will ignore it for now.. though I would not give you 3 cents for that engine with that complete trash inside it. NOTE: these are NOT causes for what you described above before the engine was rebuilt the first time... With ALL certified OEM parts, it could be ... - The oil pump spacer shimms are incorrect, have gotten lost, or have been swapped from one side to the other, etc. (or missing) and its bleeding oil out of the sides of where the shimms should be. - The oil cooler has a leak, missing o-ring, etc.. an issue ... and oil is pouring back into the pan before it reaches the oil filter. I have seen this one before, especially if it was loosing oil pressure before due to excessive soot + clogging filters, and it eventually blows out the cooling element, or a seal, etc. in this area due to excessive pre-filter pressures. - The overhead rocker shaft(s) are not installed correctly, and letting oil bleed out from underneath them. This is a common issue as well, when someone gets in a hurry and does not take extra care to install them exactly right. I have seen this one quite a few times, especially at the front bolt where the flat is, where there is a gap left open at the top due to the bolt/standoff not being seated properly. - Inlet pipe for the pump is sucking air for one reason or another. Maybe bad seal, maybe cracked, etc. etc. - Idler gear in the front gear train has something wrong with it. Bad bearing, installed wrong (or has a gap, etc. ) .. as it is supplied by the same circuit as the oil cooling nozzles and if it hemorrhages excessive oil, it can lower oil pressures across the board. - It spun an overhead cam bearing, or has wrong clearance, and oil is gushing out from where it should not be. - Crappy after-garbage head, etc. .. or someone bumped a bearing when installing a cam, and not it spun due to being damaged slightly. ... removing the valve cover + running the engine will reveal the hemorrhaging oil out from under a rocker shaft, or overhead bearing, etc. - Some complete moron did not bother to check each rod/main bearings each as they came out, one at a time,.. upper and lower, to ensure that the engine did not leave the factory when new, with a single (or more than one) alternate size lobes on the crank.. FROM FACTORY!. - This is VERY possible, though it is not too common (about 15% chance only). .. and then they, like a dumbass, put in a standard bearing kit,.. and then it spun a bearing a year later due to improper clearances for one single lobe (or 2), having the wrong damn clearance!. .. THIS SAME ISSUE is VERY common if some complete idiot put in an after-gharbage overhaul bearing kit.. and DOES NOT BOTHER TO PLASTIGUAGE EVERY DAMN LOBE!!!.. because after-trash kits are notorious for NOT being consistent and then later.. it spins a bearing, or has constant low-oil pressure issues due to too much clearances. ( more related info on low oil pressures )... https://rawze.com/forums/showthread.php?...9#pid31999 -- starting to see the picture yet?... I know its clear as mud to me what the issue is so far... CLUELESS PEOPLE WORKING ON ISX ENGINES!!!... that is the picture you clearly painted in your first post there. .. and now,. nothing is right any more,.. and everyone is throwing parts around and guessing and trashing the whole engine further into oblivion out of sheer go##damn ignorance. - That is the mess that I see with what you have described. - Like I said.. too much to unpack, and now, no one knows there ar$$e from the corn that came out of it last night, and all crying the blues when it should have been diagnosed correctly THE FIRST TIME.. and a whole lot more care and ALL OEM CERTIFIED COMPONENTS + DOUBLE TIPPLE CHECKING EVERYTHING AS IT CAME APART, ETC>ETC.ETC.. like it should have been the FIRST DAMN TIME!!> That is what I see.. the beer is talkin'. Do you think that engine would have suffered that fate if I had rebuilt it myself in my driveway>??>>> NO DAMN WAY!!>> -- As a last resort... if it cannot be found,... installing an external electric oil/transfer pump into the large port above the oil filter (after removing its guts) ... putting a plug to block off the in the inlet of the oil pump, putting a gap in the oil pan , maybe catch tray(s), etc.. .. and then running the electric oil pump + barring the engine over by hand if necessary will reveal where its hemorrhaging oil abnormally if it is really that bad. .. all that aside, that engine is ruined any ways at this point. - Letting idiots machine on the block, after-garbage internals, after-garbage head, etc.etc. and abuse after abuse .. = send it to the junk yard at this point. What a da$m shame and waste of sooo much moneys that all could have been prevented up front if someone had known what they were doing instead!. User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!. | |||
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| Yesterday, (Subject: Low Oil Pressure ) Post: #13 | |||
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RE: Low Oil Pressure (10-29-2026 )Carl Riederer Wrote: ... As a side note, low oil pressure issues aside ... I can only imagine that your also NOT seeing what people were trying to say about after-garbage branded oil filters as well. You are likely missing some key related information along the lines of using after-branded filters, and YES it is VERY VERY important to know about. Not all filters are created equal, and some brands have been NOTORIOUS for destroying ISX's (or clogging cross-channels, etc. ) due to poor o-ring designs in the filter itself. Some of the top brands are even guilty of this ... and there are a lot of chineesuium fakes out there that have gotten into the market, claiming to be genuine.. but have the older known-to-destroy engine designs in them. Here is some related info on this subject... info: https://rawze.com/forums/showthread.php?...7#pid77697 User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!. | |||
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