runaway parents Posted April 21, 2019 Report Share Posted April 21, 2019 Ok here is the question . Has any body ever took a diesel sample out of the tank to see if there is motor oil in it. Supposedly if there is oil in the fuel its a indicator of bad injectors. Fact or fiction ? Quote Link to comment Share on other sites More sharing options...
Sehc Posted April 21, 2019 Report Share Posted April 21, 2019 I don't see how motor lubrication oil could get back to the diesel fuel tank. I could be wrong, maybe the modern engines have made radical changes how they operate. Quote Link to comment Share on other sites More sharing options...
Nigel Posted April 21, 2019 Report Share Posted April 21, 2019 I have heard of fuel in the oil because of bad injectors on powerstrokes. Quote 2006 Volvo VNL 430, 2006 smart cabrio cdi, 2000 Triple E Topaz 30' Link to comment Share on other sites More sharing options...
Bill w/bus Posted April 21, 2019 Report Share Posted April 21, 2019 Remember that diesel is #2 fuel oil. What failure mode of an injector would cause motor oil to mix with the fuel oil return? Bill Quote Bill & Lynn Baxter MCI102A3 Conversion, Detroit Diesel S50 Link to comment Share on other sites More sharing options...
Darryl&Rita Posted April 21, 2019 Report Share Posted April 21, 2019 Fiction. Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
DesertMiner Posted April 21, 2019 Report Share Posted April 21, 2019 It’s the other way around.... fuel in the oil is an indication of a possible bad injector(s). Usually it’s the “injector cup” that goes bad and allows the fuel to get into the oil system. Cups on older Volvo’s were made of copper and were prone to failure. Newer updated cups are made of stainless steel. Quote Link to comment Share on other sites More sharing options...
beemergary Posted April 21, 2019 Report Share Posted April 21, 2019 Like DesertMiner says and can happen with all makes of diesels where the injector and the line feeding it is inside the valve cover. Quote Link to comment Share on other sites More sharing options...
runaway parents Posted April 21, 2019 Author Report Share Posted April 21, 2019 So where I got this from I was watching Diesel Brothers and they where installing new injectors in a cumin's engine They stated that the injectors where allowing oil to return back to the fuel tank threw the fuel return line do to a bad seal on the injector. What do you think? Are these guys full of bull or are they trying to get rating's Quote Link to comment Share on other sites More sharing options...
rickeieio Posted April 21, 2019 Report Share Posted April 21, 2019 Most diesels don't have engine oil in the injectors at all, but some PowerStrokes do utilize high pressure motor oil to open injectors. So, in theory, those could have this scenario. Quote KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio1@comcast.net Link to comment Share on other sites More sharing options...
Darryl&Rita Posted April 21, 2019 Report Share Posted April 21, 2019 9 hours ago, runaway parents said: So where I got this from I was watching Diesel Brothers and they where installing new injectors in a cumin's engine They stated that the injectors where allowing oil to return back to the fuel tank threw the fuel return line do to a bad seal on the injector. What do you think? Are these guys full of bull or are they trying to get rating's Would you buy a vehicle from them? Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
runaway parents Posted April 21, 2019 Author Report Share Posted April 21, 2019 1 hour ago, Darryl&Rita said: Would you buy a vehicle from them? no Quote Link to comment Share on other sites More sharing options...
runaway parents Posted April 21, 2019 Author Report Share Posted April 21, 2019 yep I understand the power stroke theory had a o ring in the plug at the end of the high pressure oil rail next to the fire wall go out .near rock creek had to have pickup towed to Penticton to get it fixed took two wreckers one for pickup other for fifth wheel .when we got it to the dealership Saturday evening there mechanic just left for the week end at that time we still did not why the motor was dumping oil out of it honestly thought we threw a rod .So we had two options one to camp out in the ford dealership lot till Monday with no power and 98 degrees or two hike down to the parts store and talk to those guys and try to figure this out. I talked to the sales man told him my problem and before I got my story told he said follow me so we went up one aisle and down the other picking up tools and a o ring. the sales man went out the front door hiked to the ford dealership with me .climbed into the truck and repaired it for me .he told me that this was a common problem with these power strokes he used to work as a mechanic up at Prudhoe bay. He had me up and running in about 15 minutes. wow talk about going beyond the call of duty .so I asked what do I owe him . he said not a thing we got to keep you American,s happy you spend a lot of money up here.so he would not take any money not even for the parts . so what I did was bought the store pizza for dinner. Quote Link to comment Share on other sites More sharing options...
Exile Posted April 23, 2019 Report Share Posted April 23, 2019 Just look in the fuel tank with a light. Engine oil in a diesel is black as sin, it should stain the diesel when the tank gets low. Quote 98 379 with 12.7 DD LG Dodge w/5.9 CTD Chrome habit I’m trying to kick. Link to comment Share on other sites More sharing options...
Bob A Posted April 24, 2019 Report Share Posted April 24, 2019 No neeed to sample fuel will be dark on our old Volvo if the fuel supply pump seal goes it will (did) suck engine oil in and slowly add oil to fuel. pretty easy replacement Quote 2014 jayco siesmic 3914 1998 volvo 610, singled short ( bought in 2005) 14 speed volvo tranny 2014 Toyota yaris Link to comment Share on other sites More sharing options...
noteven Posted April 26, 2019 Report Share Posted April 26, 2019 Early Cummins “Signature “ 600hp/2050 torks ISX’s z would leak combustion pressure at the injectors forming “asphaltines” in the return fuel. The fuel in the tanks would turn black. Quote "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
runaway parents Posted April 26, 2019 Author Report Share Posted April 26, 2019 2 hours ago, noteven said: Early Cummins “Signature “ 600hp/2050 torks ISX’s z would leak combustion pressure at the injectors forming “asphaltines” in the return fuel. The fuel in the tanks would turn black. Interesting. Quote Link to comment Share on other sites More sharing options...
runaway parents Posted April 26, 2019 Author Report Share Posted April 26, 2019 The truck they where working on had a Cummins isx engine in it . It was in a logging truck that was a triple axle truck. Quote Link to comment Share on other sites More sharing options...
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