Joey Mack Posted April 10, 2023 Share Posted April 10, 2023 Thanks FJH.. I just went through this last summer with 2 in a row, an E-Tech that had a bad fuel pump, and the fuel washed the bearings, (Re-build)... The second was an ASET.. I found both compression rings on #3+#4 piston were stuck in the grooves.. and also found the hidden gallery plugs loose.. Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528926 Share on other sites More sharing options...
fjh Posted April 10, 2023 Share Posted April 10, 2023 2 hours ago, Joey Mack said: Thanks FJH.. I just went through this last summer with 2 in a row, an E-Tech that had a bad fuel pump, and the fuel washed the bearings, (Re-build)... The second was an ASET.. I found both compression rings on #3+#4 piston were stuck in the grooves.. and also found the hidden gallery plugs loose.. Yup Joe He needs to get on top of this fast! I went thru this with my Davey brown tractor and my buddy's Massey tractor last summer as well need to stay on top of this situation! When they changed to that filter/ combined pump is when the problem started! Very few failures up to that point! I believe he's chasing a dilution issue here how ever need to nail down from where! Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528934 Share on other sites More sharing options...
Joey Mack Posted April 10, 2023 Share Posted April 10, 2023 FJH,, I'm glad you posted your opinion.. I re built those 2 engines last year because of it.. Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528936 Share on other sites More sharing options...
IGV Posted April 10, 2023 Author Share Posted April 10, 2023 Their's a big chance that the lift pump is bad then Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528943 Share on other sites More sharing options...
Joey Mack Posted April 10, 2023 Share Posted April 10, 2023 Hopfully its that or the EUP o-rings.. Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528945 Share on other sites More sharing options...
IGV Posted April 10, 2023 Author Share Posted April 10, 2023 Ok I'm about to go check the truck because I was busy in the morning, one more thing since I bought the truck last year it had been throwing a code for eup #3 do you think it has to do something with the leak? Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528946 Share on other sites More sharing options...
Joey Mack Posted April 10, 2023 Share Posted April 10, 2023 It is possible,. With this new info... Check to see if that EUP has broken and /or loose hold down bolts.. if so,, the EUP is moving up and down, riding the cam lobe.. it WILL leak... Should see leakage outside too.. Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528947 Share on other sites More sharing options...
IGV Posted April 10, 2023 Author Share Posted April 10, 2023 Ok thank you I will check it to Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528949 Share on other sites More sharing options...
IGV Posted April 10, 2023 Author Share Posted April 10, 2023 There's 2 sensors on the oil filter housing one small an the other big the big one is cover in oil, Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528952 Share on other sites More sharing options...
IGV Posted April 10, 2023 Author Share Posted April 10, 2023 Which one is the oil pressure sensor? Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528953 Share on other sites More sharing options...
Joey Mack Posted April 10, 2023 Share Posted April 10, 2023 I always forget. The one with 3 wires is it.. I think.. the other is temp. It will have a brass probe on the end. The pressure sensor has a small opening in the end. Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528954 Share on other sites More sharing options...
IGV Posted April 10, 2023 Author Share Posted April 10, 2023 Ok thank you, I'm asking because I'm gonna check the sensor, because I did another halo test and this time it looks much darker yesterday I did it and oil was a bit hot, do you think that would make a difference? Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528955 Share on other sites More sharing options...
Joey Mack Posted April 10, 2023 Share Posted April 10, 2023 Yes. To a point .. but. Since you have a concern, you may want to keep testing. Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528957 Share on other sites More sharing options...
IGV Posted April 10, 2023 Author Share Posted April 10, 2023 Yes I'm doing some testing, I took the oil temperature sensor connector out and is full of oil Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528959 Share on other sites More sharing options...
Joey Mack Posted April 10, 2023 Share Posted April 10, 2023 if you are able to get the oil pressure to read correctly,, I suggest an oil change and test drive it and check the oil.. when you fill it with new oil to the full line, take a picture of the dipstick.. then after 30 minutes, shut it off, let it sit for 10 minutes, and check the level again.. if it has changed a lot then you may still have fuel getting in.. Let us know... Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528960 Share on other sites More sharing options...
IGV Posted April 11, 2023 Author Share Posted April 11, 2023 Yes I just did the oil change and the pressure now at 1400 1600 rmp is around 60psi and at idle is around 30 25 psi, Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528974 Share on other sites More sharing options...
Joey Mack Posted April 11, 2023 Share Posted April 11, 2023 so what did you do before this oil change? did you flush out the sensors? I am still concerned about the Halo test.. Did you send an oil sample out for analysis? Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528975 Share on other sites More sharing options...
fjh Posted April 11, 2023 Share Posted April 11, 2023 9 hours ago, IGV said: Their's a big chance that the lift pump is bad then Higher on the list as you have found bits in the filter! Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528976 Share on other sites More sharing options...
IGV Posted April 11, 2023 Author Share Posted April 11, 2023 I'm a bit confused I did another halo test Left top is my trucks cold oil bottom left my brother's truck oil cold middle is my truck hot oil do you guys think synthetic blend would be thinner than regular oil? Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528977 Share on other sites More sharing options...
IGV Posted April 11, 2023 Author Share Posted April 11, 2023 Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528978 Share on other sites More sharing options...
IGV Posted April 11, 2023 Author Share Posted April 11, 2023 I couldn't tested any further because my brother in law couldn't borrow me his air compressor I didn't send oil sample yet because their is a mechanic by where we park our trucks and told me that by the way the oil looks he dont think it has fuel In it, does lift pumps can fail without leaking fuel? Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-528983 Share on other sites More sharing options...
fjh Posted April 11, 2023 Share Posted April 11, 2023 They usually fail in this fashion the other thing that can happen is the drive gear can come loose but that is a failure that used to happen to the older style pump with out the filter head built into it! Maybe price the pump !BUT the parts cannon approach is not the way to go if that's what your thinking you need to verify if the fuel has indeed got into the oil ! OIl samples are cheap go to any equipment outlet they will likely have a sample kit If you have a CAT dealer near by stop and Get an SOS sample kit and get it done the longer you wait and mess around the longer it will take to get things up and running again! the halo test is a back yard test and works if you are familiar on what to look for do it on a piece of card board ! the sample will tell the tail of the oil pressure but NOT where it Came from! Bro just follow through with the tests that Joey has provided! If The pan is off all you need now is REGUTATED AIR 60-70 psi and eye balls to test! AND a little luck! Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-529001 Share on other sites More sharing options...
IGV Posted April 11, 2023 Author Share Posted April 11, 2023 Yes I will definitely get the oil analysis, the thing about the air pressure test is that I don't have an air compressor I was going to use my brother in law compressor but he had to do some other stuff his is going to help me do the test but his been busy this days so I decided to change the oil to see if there was going to make any difference in oil pressure, and did maked a difference but I know that if there is fuel dilution it gonna take a bit to start showing any symptoms of low oil pressure? Do you huys think 1300 k miles on the oil could cause low oil pressure? Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-529021 Share on other sites More sharing options...
IGV Posted April 11, 2023 Author Share Posted April 11, 2023 I think I'm A bit confused, I apologize to everyone i didn't meant to waste your time but I was a little bit worried about the drop in the oil pressure, that's why I posted my questions so i could get help from you guys, Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-529022 Share on other sites More sharing options...
Joey Mack Posted April 12, 2023 Share Posted April 12, 2023 How about this?? You just put new oil in it,, and pressure is good now... Run the truck and keep your eyes on it... Then get back to us.. All of us who are mechanics/ owners, know that this is a challenge.. Just keep in touch, and post all of what you did, and what the truck did.. with respect, Jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/72701-oil-pressure/page/3/#findComment-529024 Share on other sites More sharing options...
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