R.E.D Posted November 12, 2021 Share Posted November 12, 2021 (edited) Truck has developed a low to mid rpm ticking sound.seems the same on power.the air compressor is passing a good bit of oil and noise comes from that area.Im waiting for a mechanic stethoscope to kinda zero in on the source..I'm thinking air compressor but I'm also wanting to check the eups since the rollers or springs could be bad.im going to order the eup orings and see what happens.What other components do yall recommend I check? ticking sound is felt most from 800 to 1300 rpm.let me know what y'all think . Thanks Red Edited November 12, 2021 by R.E.D Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/ Share on other sites More sharing options...
fjh Posted November 12, 2021 Share Posted November 12, 2021 I would run thru a valve set and see if you find any loose valves you may have a cam failure underway ! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482752 Share on other sites More sharing options...
R.E.D Posted November 12, 2021 Author Share Posted November 12, 2021 3 hours ago, fjh said: I would run thru a valve set and see if you find any loose valves you may have a cam failure underway ! Yea figured so..if cam shaft is failing , at least I'll get rid of the exhaust bump and put a ac cam..it's suprising how dirty and thick the oil gets from the exhaust scavenging. Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482762 Share on other sites More sharing options...
R.E.D Posted November 13, 2021 Author Share Posted November 13, 2021 Stethoscope test is leading me to believe eup roller for 4 and 5 could be bad.or have broken springs Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482805 Share on other sites More sharing options...
R.E.D Posted November 14, 2021 Author Share Posted November 14, 2021 Update ,3 eups bad , springs seem to be collapsed because keeper was just dancing around..roller are excellent , eup guide pins look good too. Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482866 Share on other sites More sharing options...
R.E.D Posted November 14, 2021 Author Share Posted November 14, 2021 Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482867 Share on other sites More sharing options...
Joey Mack Posted November 14, 2021 Share Posted November 14, 2021 well there,,, did you look at the cam lobes in the EUP bores? Good luck man, you may have caught this before the BIG problem happens.. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482879 Share on other sites More sharing options...
R.E.D Posted November 15, 2021 Author Share Posted November 15, 2021 5 hours ago, Joey Mack said: well there,,, did you look at the cam lobes in the EUP bores? Good luck man, you may have caught this before the BIG problem happens.. jojo They looked great, so did the rollers.no scratches.valve lash was still good.. could use adjustment on some valves , I'll run the overhead once everything is back together Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482892 Share on other sites More sharing options...
Joey Mack Posted November 15, 2021 Share Posted November 15, 2021 👍 Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482893 Share on other sites More sharing options...
Joey Mack Posted November 15, 2021 Share Posted November 15, 2021 I expect that you will record the serial numbers and calibration codes on each EUP/Cyl. and have Mack program them into the EECU?,, jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482894 Share on other sites More sharing options...
R.E.D Posted November 15, 2021 Author Share Posted November 15, 2021 Yessir..I already have a efile open from them to upgrade to 427hp..i plan to kill two birds with one stone..also need to remove the 5 minutes shuttoff. Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482896 Share on other sites More sharing options...
880joe Posted November 15, 2021 Share Posted November 15, 2021 Is it really needed to have the eup's programmed? I have changed several and never did that but only on 1 set couldn't tell any difference in the way they ran just in my wallet when Mack got done with me Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482906 Share on other sites More sharing options...
R.E.D Posted November 15, 2021 Author Share Posted November 15, 2021 49 minutes ago, 880joe said: Is it really needed to have the eup's programmed? I have changed several and never did that but only on 1 set couldn't tell any difference in the way they ran just in my wallet when Mack got done with me It's required per the manual , but I really couldn't tell you.Im just gonna be there anyway for the hp upgrade so might as well. Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482907 Share on other sites More sharing options...
Joey Mack Posted November 15, 2021 Share Posted November 15, 2021 (edited) the engine will run good,, but we were always taught to enter the codes, especialy when changing several of them... I also beleive it is required for warranty, of course, Warranty is just a word, and rarely ever an action.. ...jojo Edited November 15, 2021 by Joey Mack More content needed Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482910 Share on other sites More sharing options...
fjh Posted November 15, 2021 Share Posted November 15, 2021 (edited) 3 hours ago, 880joe said: Is it really needed to have the eup's programmed? I have changed several and never did that but only on 1 set couldn't tell any difference in the way they ran just in my wallet when Mack got done with me The trim / cal code is just a finer adjustment for the puter to use as a starting point was how it was explained to me ! Not totally necessary but not a bad idea to get it done! Good find RED Check the Guide pins while your rollers are up bud ! Also Bro some Advice ! Replace All the EUP bolts these tend to work loose and break occasionally! Edited November 15, 2021 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482913 Share on other sites More sharing options...
R.E.D Posted November 15, 2021 Author Share Posted November 15, 2021 6 hours ago, fjh said: The trim / cal code is just a finer adjustment for the puter to use as a starting point was how it was explained to me ! Not totally necessary but not a bad idea to get it done! Good find RED Check the Guide pins while your rollers are up bud ! Also Bro some Advice ! Replace All the EUP bolts these tend to work loose and break occasionally! Guide pins look good, haven't measured them but all look good,I think the book says 2mm stick out ,can't quite remember.i had all the eup tested ..the 3 suspected to be good passed the test.two of the ones with loose springs just needed a new clip the injector shop guy said....so far , one was bad for sure.ill pick them up tomorrow morning and see what's what..I got some Bosch reman on will call at m&d distributors ready to be picked up in case I decide to just replace the 3 questionable ones..431$ a piece. Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482934 Share on other sites More sharing options...
R.E.D Posted November 16, 2021 Author Share Posted November 16, 2021 One of the eup was higher in in pressure.413 he said, all other ones were in the 340 to 370? could this high pressure cause a fuel knock? Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482970 Share on other sites More sharing options...
fjh Posted November 16, 2021 Share Posted November 16, 2021 Possibly Is it a newer one? Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482972 Share on other sites More sharing options...
880joe Posted November 16, 2021 Share Posted November 16, 2021 What diesel shop are you using that can test the eyp' s Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482981 Share on other sites More sharing options...
R.E.D Posted November 16, 2021 Author Share Posted November 16, 2021 Local shop in houston.they are tooled to test them.I replaced the higher pressure eup.so all in all replaced two with reman Bosch .yet the ticking is still there ..not as bad but it's still there..I'll investigate a bit longer and let you all know. Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482988 Share on other sites More sharing options...
R.E.D Posted November 16, 2021 Author Share Posted November 16, 2021 (edited) Machine that tested the eups here in houston sounded just like this one. https://youtu.be/elCZ3HMp8k4 Edited November 16, 2021 by R.E.D Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482989 Share on other sites More sharing options...
Joey Mack Posted November 16, 2021 Share Posted November 16, 2021 just for kicks, take the belts off of the engine when engine temp is at the point when the noise is there,,, cold or hot... run it for a few minutes and listen... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482990 Share on other sites More sharing options...
R.E.D Posted November 16, 2021 Author Share Posted November 16, 2021 And this is where I bought the Bosch remans. https://www.mddistributorsstore.com/bosch/0986-445-008/reman-eup-injection-pump Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482991 Share on other sites More sharing options...
R.E.D Posted November 16, 2021 Author Share Posted November 16, 2021 Just now, Joey Mack said: just for kicks, take the belts off of the engine when engine temp is at the point when the noise is there,,, cold or hot... run it for a few minutes and listen... jojo Joey I kinda was getting the same idea,but didnt unhook the belt, I stethoscoped the water pump and alternator and they sounded good..noise kinda sounds like a blown exhaust gasket on a small block Chevy. Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482992 Share on other sites More sharing options...
Joey Mack Posted November 16, 2021 Share Posted November 16, 2021 and it may very well be a blown int. or exh. gasket... but still... when you found the EUP issues, you truly beat the devil before he showed his horn's..... I feel like youre approach for this issue is pretty good. I'm sure others will agree... jojo Quote Link to comment https://www.bigmacktrucks.com/topic/68719-low-to-mid-rpm-ticking-sound/#findComment-482993 Share on other sites More sharing options...
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