peub Posted March 31, 2008 Share Posted March 31, 2008 I've had fuel in my oil and I'm wondering if some one can help. After setting over the winter I noticed my oil pressure dropping when I started up for Spring work season.I'm having the injector pump and supply pump checked for leaks. The pump was purchased 17 months ago from REMACK and included injectors. No luck with REMACK helping out.I've been told that I need to check my injectors but I haven't noticed any dampness around the injectors or visable leaks around the heads, plus the engine runs fine. Any suggestions? Quote Link to comment https://www.bigmacktrucks.com/topic/3581-em6-250-fuel-in-oil/ Share on other sites More sharing options...
fjh Posted April 1, 2008 Share Posted April 1, 2008 i'm assuming you have a 4 valve head engine!????If so remove the valve covers remove the plugs that hold the injectors in and look on top of the injectors You will see fuel there if the orings are leaking! Quote Link to comment https://www.bigmacktrucks.com/topic/3581-em6-250-fuel-in-oil/#findComment-17981 Share on other sites More sharing options...
peub Posted April 1, 2008 Author Share Posted April 1, 2008 i'm assuming you have a 4 valve head engine!????If so remove the valve covers remove the plugs that hold the injectors in and look on top of the injectors You will see fuel there if the orings are leaking!The heads are 2 valve with the external injectors. That is why I can't see how fuel could be getting into the oil without a miss in the engine or fuel leaking out somewhere. Quote Link to comment https://www.bigmacktrucks.com/topic/3581-em6-250-fuel-in-oil/#findComment-17989 Share on other sites More sharing options...
theakerstwo Posted April 1, 2008 Share Posted April 1, 2008 Have you had your oil checked to see if fuel is in the oil or does it just look like it. It is hard to detect if not by a oil sample testing. glenn Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/3581-em6-250-fuel-in-oil/#findComment-18007 Share on other sites More sharing options...
peub Posted April 1, 2008 Author Share Posted April 1, 2008 Have you had your oil checked to see if fuel is in the oil or does it just look like it. It is hard to detect if not by a oil sample testing. glennYeah. I had the local CAT dealer check the oil for fuel. It was positive for fuel. The engine oil pressure had dropped considerably and that is what alerted me to my problem. My Mack dealer told me to check the injectors but I really can't see how they could be contributing to my problem when they appear to be completely dry and the engine has not developed a miss or vibration. The pump came in today and the shop said it had two o-rings that were rolled over or twisted but not broken. I put the pump back on but I think I will drop the oil pan and have a look, just to settle my mind of any further problems. Thank you guys for trying to help! Quote Link to comment https://www.bigmacktrucks.com/topic/3581-em6-250-fuel-in-oil/#findComment-18010 Share on other sites More sharing options...
HK Trucking Posted April 2, 2008 Share Posted April 2, 2008 Yeah. I had the local CAT dealer check the oil for fuel. It was positive for fuel. The engine oil pressure had dropped considerably and that is what alerted me to my problem. My Mack dealer told me to check the injectors but I really can't see how they could be contributing to my problem when they appear to be completely dry and the engine has not developed a miss or vibration. The pump came in today and the shop said it had two o-rings that were rolled over or twisted but not broken. I put the pump back on but I think I will drop the oil pan and have a look, just to settle my mind of any further problems. Thank you guys for trying to help!Why pull the oil pan and "have a look"?There's nothing down there that would put fuel in the oil.If you have the Robert Bosch pump, I'd say that O ring problem was probably the culprit. I recall the same thing happening to an ENDT676 back in the early 80's and it was caused by O rings in the pump. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/3581-em6-250-fuel-in-oil/#findComment-18030 Share on other sites More sharing options...
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