dds92780 Posted December 22, 2012 Share Posted December 22, 2012 I made a video today to show you all what is going on. I just had my pump rebuilt too. There is something that still doesnt seem right . The truck makes good power but there is still some shake going on that is noticed around 1100 to 1300 rpm. The video will explain it all. Please let me know what you think. Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/ Share on other sites More sharing options...
oilburner Posted December 22, 2012 Share Posted December 22, 2012 got any smoke when the shake starts? Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152497 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 No there is no smoke at all Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152498 Share on other sites More sharing options...
oilburner Posted December 22, 2012 Share Posted December 22, 2012 I am sure someone here will lead you the right way, it could just be a bad motor mount or exhaust vibrating something, i don't for sure, was going to say a injector but i belive it would smoke. It sounds good to me but i know what you mean somtimes thing just aren't right and the guys working on them say you crazy there nothing aworng, then after a week or to something major happens. Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152499 Share on other sites More sharing options...
oilburner Posted December 22, 2012 Share Posted December 22, 2012 I am sure someone here will lead you the right way, it could just be a bad motor mount or exhaust vibrating something, i don't for sure, was going to say a injector but i belive it would smoke. It sounds good to me but i know what you mean somtimes thing just aren't right and the guys working on them say you crazy there nothing aworng, then after a week or to something major happens. What engine and what year is the truck? Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152500 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 95 rd e7 350 mechanical. 359000 miles Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152503 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 I never thought that I might be related to exhaust but i guess its possible Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152504 Share on other sites More sharing options...
rsb502 Posted December 22, 2012 Share Posted December 22, 2012 Check your balancer, I can't remember if the e7 mechanical engines had the rubber in the two piece balancer or not but that's where I would start. 1 Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152505 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 How do I check that? Is it a big job? Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152507 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 Did you have the injectors built also? Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152510 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 As far as the balancer in concerned take it off and run engine without it to see if makes a differance sometimes when they go bad the balancer temp will be high check for dents in it ding marks Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152511 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 Thanks for all the help so far guys. Keep it coming. Also could someone let me know If my truck has a balancer for sure or not? The head needing new valve seals wouldnt cause that? Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152513 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 You have a balancer its rite behind your belt pully 1 Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152514 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 That could be causing that? Im surprised my mechanic never thought of that. Hmmm Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152515 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 Did you rebuid or replace the injectors? Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152516 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 Rebuilt from midwest injection 3 months ago Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152517 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 If the clutch could be out of balance also missing springs broken or cracked center plate , try running the rpm,s up like you did in the video but with the clutch pedal pushed in and see if that makes any differance. Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152518 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 K I will try that tomorrow Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152520 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 Sounds to me like a slight miss if it was me I would bring the engine rpm up to 1100 were the miss is the most noticable with the hand throttle then loosen up the injector line at the injection pump one at a time to see what cylinder has the miss . Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152525 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 Yeah we tried that before i took the pump in, it would run colder on cylinder #6 i havent tested the temps out yet. But my mack mechanic was over at my shop and came to the conclusion it was a bad pump, we also did a valve lash adjustment and bridges proper and he noticed that when he removed the valve cover, it looked a little dry so he thinks i might need a new head or i have a valve or two not opening or closing properly. So are you saying to check the balancer? You arent talking about a harmonic balancer are you? What exactly does the balancer do? Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152529 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 When you say dry do you mean lack of oil ? and yes harmonic balancer its job is to absorb vibrations that the engine creates to keep everything running smooth , Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152531 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 Here is another video from today. It's just to show you i think the truck is making power, maybe you will hear the miss maybe you wont. That shake at that rpm band annoys me though, its only in the 3rd and 4th gear loaded is when its most noticeable. Give me your expert opinion if it seems like a good runner. Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152532 Share on other sites More sharing options...
dds92780 Posted December 22, 2012 Author Share Posted December 22, 2012 Not necessarily dry but not as much oil on the valves that should of been there. Thats the only reason he suggested maybe valve guides after i told him it still has a slight miss even after i rebuilt the pump . You guys are really helpful Quote Slow and Steady Wins the Race! Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152533 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 I like it, sounds good plenty of boost looked like pyro temp was up a little . With the boost at 30 that engine should be making plenty of power for ya. Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152536 Share on other sites More sharing options...
staxx Posted December 22, 2012 Share Posted December 22, 2012 The oil in the valve train issue could be worn rockershaft bushings clogged oil bleed hole on rockers . Quote Link to comment https://www.bigmacktrucks.com/topic/28966-my-youtube-idle-video/#findComment-152537 Share on other sites More sharing options...
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