tecanic1 Posted December 10, 2005 Share Posted December 10, 2005 looking for any info on 7.3 using oil roughly 1quart a week ...compression test passes ..has all new injectors and crankcase psi is 2" of mec per all the specs this engine should not be burning any oil but has a lot oil in inter cooler and inatke tube off of air filter ... turbo is dry and cold side inter cooler tube drips oil out of it ...i am in the process of tearing this engine down and inspecting ...engine is out that is as far as i got .....anywas any help greatly appriciated thanks Quote Link to comment Share on other sites More sharing options...
Torqued_Up Posted December 12, 2005 Share Posted December 12, 2005 Did this engine use oil before the new injectors as well? A cut lower oil seal will cause oil to leak into the fuel causing that black-fuel syndrome. Quote Link to comment Share on other sites More sharing options...
tecanic1 Posted December 14, 2005 Author Share Posted December 14, 2005 yes this engine has been burning oil since the show room floor Quote Link to comment Share on other sites More sharing options...
lugnut25 Posted December 16, 2005 Share Posted December 16, 2005 hey there guys. engineering has said that any movement of the in/Hg gauge means that there is some wear in the engine. 2" of crankcase pressure sound like a scored ring. maybe something at the factory was buggered up when assembled?? but any blowby significant enough to move the pressure gauge indicates a problem... just my 2 cents..... Quote Link to comment Share on other sites More sharing options...
Jeff_ Posted December 16, 2007 Share Posted December 16, 2007 Are your injectors new or Reman? I've been burned by a reman injector before. If you have one of the 7.3 injector bench testers that Ford sent to us a couple years ago, you can vacuum test the injectors to check for internal plunger leakage - which will cause oil consumption because it will be injected in to the cylinder and be burned as fuel. There is a video clip on the tech time plus archives that explains how it works (I think a web course too). I'd start there before doing exploratory surgery on the engine. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted December 16, 2007 Share Posted December 16, 2007 OOOOH! The man is sharp! /forums/images/%%GRAEMLIN_URL%%/thumbup.gif Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted December 16, 2007 Share Posted December 16, 2007 Ford reman injectors kinda leave me "cold", anyway. One of our techs suffered through about 30 hours on a FQR 7.3, jumping through hotlines hoops. A set of aftermarket injectors was the cure. If worst comes to worst, pop the exhaust manifolds and look for any "smoking guns". Quote Link to comment Share on other sites More sharing options...
Dr_Siko Posted December 17, 2007 Share Posted December 17, 2007 I only use Alliant New injectors, been burnt too many times with reman ford injectors. I have had good results reading the glow plugs, wash the pocket with brake cleaner and blowout the residue, when you get the glow plug out the offending injector will leave a tan residue from the engine oil. It has not failed me yet. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted December 17, 2007 Share Posted December 17, 2007 That is a nice little trick, will definetly try that if the occasion ever turns up in my bay. /forums/images/%%GRAEMLIN_URL%%/thumbup.gif Quote Link to comment Share on other sites More sharing options...
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