jaysonfordtech Posted June 29, 2007 Share Posted June 29, 2007 Hey guys I have one that I think may be a casting flaw in the block, but I wanted to run it past you guys. 06 f550 air check ok, irp changes tone. 16 seconds of crank time in the morning to build low pressure oil and about 18 to start. We get about 75 psi of pressure at idle cold. Checked the oil level before attempt to start this morning, it was at the top of the marks. After it started we checked again and it was about 1.5qt.s down. Checked flow at the filter housing about 8 to 10 seconds to fill with the drain depressed. Prior history is pump and ipr for same concern about 1k ago. This one is one of my newly minted diesel techs jobs. I told him that he will have a great understanding of high pressure oil systems by the time he is done with this job. Quote Link to comment Share on other sites More sharing options...
jaysonfordtech Posted July 6, 2007 Author Share Posted July 6, 2007 don't worry guys got it figured out. Thanks Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted July 6, 2007 Share Posted July 6, 2007 Whoa! I missed this post completely! Sorry dude, it was a little slow round here past the holiday which some of us are still on! /forums/images/%%GRAEMLIN_URL%%/drinkingdude.gif So, um, what did you find and how much did you new diesel tech suffer and learn? Quote Link to comment Share on other sites More sharing options...
GregH Posted July 6, 2007 Share Posted July 6, 2007 Let me guess - you found a crack in the high pressure pump "resevoir" located under the oil cooler assembly. Allowed the oil to drain down into the crankcase after it sat for a while. The high pressure pump is then being fed nothing but air until the low pressure pump puts some oil back into the resevior. Then you've got air in the high pressure system again, and it's associated starting and drivability symptoms. The fix was a replacement short block... Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted July 6, 2007 Share Posted July 6, 2007 I have seen two cracked blocks too but neither caused starting concern. The DID leak a lot of oil though! Quote Link to comment Share on other sites More sharing options...
jaysonfordtech Posted July 13, 2007 Author Share Posted July 13, 2007 Well, he retested oil flow cold and found about 18 seconds to fill the filter housing. Something passed through the low pressure pump. The front cover had a massive gouge in it, and the pump was also damaged. It sill does not explain why he found the oil level changed, but it is fixed. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted July 13, 2007 Share Posted July 13, 2007 Good news! Thanx for letting us know how it turned out. The pick up screens in these engines lets a lot of stuff pass that can damage the oil pump or get stuck in the regulator. This is why engineering insists that we find all of the pieces of broken injector o-ring backing rings and retainers that can easily pass through the screen... not to mention rocks, leaves, small pets and children. I did mention the screen is not very fine! How much metal did you find in the filter housing? Quote Link to comment Share on other sites More sharing options...
jaysonfordtech Posted July 14, 2007 Author Share Posted July 14, 2007 Not much, but this is a fleet rig that has had this problem for 8 or 10k miles so it had been changed a few times. My tech mentioned that he though now that he had sold his soul to the diesel devil by getting certified, lol. Poor kid lost his AS* on that job. I told him to go to our service manager who is a good guy and ask if he would split the difference seeing as it was his first big diesel job, but he was too prideful to ask for help. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted July 14, 2007 Share Posted July 14, 2007 I told him to go to our service manager who is a good guy and ask if he would split the difference seeing as it was his first big diesel job, but he was too prideful to ask for help. I think we all have eaten a lot of time learning on these engines. When one of my guys takes a beating from a truck I try to get some good jobs to them or encourage them to take some extra PDI's to pick up their hours and sometimes lift their morale. In any event, I hope that he learned a lot in the process and understands that this will not be the last time this will happen. Quote Link to comment Share on other sites More sharing options...
jaysonfordtech Posted July 14, 2007 Author Share Posted July 14, 2007 Same happens here, you get a serving of gravy after you eat your bowl of sh**. I think he was upsidedown by about 8 or so hours, that is why I suggested asking. Being on straight flat rate it is nice to have a boss that understands that there can be a learning curve. Quote Link to comment Share on other sites More sharing options...
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