RobM626 Posted April 16, 2018 Author Share Posted April 16, 2018 4 minutes ago, Rob said: Sorry about that. Try this. Look for high stainless cap nuts in your proper thread size. See if this one will take you there: https://www.mcmaster.com/#cap-nuts/=1cfi6m6 If not, try this one: https://www.mcmaster.com/#cap-nuts/=1cfi5z2 Got it ... I was guessing acorn cap nuts ... what finish u think I should use? I bought chrome acorn nuts from Home Depot for my mirors when I replaced the old seized ones and they’re completely rusted already. Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396751 Share on other sites More sharing options...
Rob Posted April 16, 2018 Share Posted April 16, 2018 6 minutes ago, RobM626 said: Got it ... I was guessing acorn cap nuts ... what finish u think I should use? I bought chrome acorn nuts from Home Depot for my mirors when I replaced the old seized ones and they’re completely rusted already. 304, or 18-8 stainless. 304 is better but I don't think Mcmaster has them. 18-8 will hold up well. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396753 Share on other sites More sharing options...
RobM626 Posted April 16, 2018 Author Share Posted April 16, 2018 1 minute ago, Rob said: 304, or 18-8 stainless. 304 is better but I don't think Mcmaster has them. 18-8 will hold up well. Thanks so much Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396754 Share on other sites More sharing options...
RobM626 Posted April 16, 2018 Author Share Posted April 16, 2018 21 minutes ago, Mack Technician said: Whadja get? 2008 mack granite Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396757 Share on other sites More sharing options...
Mack Technician Posted April 16, 2018 Share Posted April 16, 2018 Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396803 Share on other sites More sharing options...
RobM626 Posted April 16, 2018 Author Share Posted April 16, 2018 4 hours ago, Mack Technician said: I love the granites. And it looks pretty good for an 08 and the mileage is really low. I just hope the injector issue gets resolved and let’s the truck get out and earn it’s keep. I do wish it had an mp8 instead of the 7 but we’ll see how it does Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396832 Share on other sites More sharing options...
Mack Technician Posted April 16, 2018 Share Posted April 16, 2018 I wouldn't disrespect any hard working truck, but the instructor at the Mack Engine training advised the same........to stick close, whenever possible, to the MP8 platform. His opinion seems to echo's yours. Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396834 Share on other sites More sharing options...
RobM626 Posted April 16, 2018 Author Share Posted April 16, 2018 Our 2012 mp8 has pretty much been a reliable hard working truck. We have had our fair share of issues with aftertreatment system . Basically replaced whole system twice since 2012. But the motor has treated us well. A water pump and that was basically the extent of repairs besides accessories like fan clutch and air conditioner compressor. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-396838 Share on other sites More sharing options...
Popular Post RobM626 Posted May 5, 2018 Author Popular Post Share Posted May 5, 2018 Well I’m sure you guys are probably sick of hearing about this truck but I have some progress in the works. i brought the truck to a new shop after I went back to the guys that were previously doing the work and they told me “I don’t know what to tell you” this shop it’s out now is where I should have gone in the first place but they don’t do motor work and I tried to kill 2 birds with one stone. so far they took the drive shaft down check it out and balanced it, put a couple new u-joints in, and re-packed it. They did a complete check on the under carriage and also found a wheel bearing that was literally falling apart so we replaced that as well. My king pins needed adjusting and my tie rod as well. I took the truck for a test drive after he completed the work so far and it feels like we’re getting somewhere. He’s going to drop the tranny on Monday and try to determine what the clutch issue is. He has some ideas on what it may be but isn’t a part changer just for the hell of it. He’s the first person that is actually checking everything out and not guessing. He seems to think there’s an alignment problem with the transmission so he’s going to check the bellhousing and flywheel housing a also dial indicate the flywheel. They also said the were going to put a new flywheel and clutch on to test it and that I do t have to buy it unless we determine that it’s the culprit of my problems.I’m starting to feel relief that I’m dealing with someone that isn’t trying to put us into a bigger hole if it’s not going to fix the truck. ill give another update when I hear back from them 5 Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-398302 Share on other sites More sharing options...
superliner500 Posted May 6, 2018 Share Posted May 6, 2018 I had a fly wheel housing that wasn’t square. Now machined and true. Worth a check. Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-398363 Share on other sites More sharing options...
fjh Posted May 6, 2018 Share Posted May 6, 2018 Good to hear of the progress finally, definately keep us posted for the end result ! Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-398380 Share on other sites More sharing options...
RobM626 Posted May 6, 2018 Author Share Posted May 6, 2018 Will do... I personally am so curious to know what is actually the problem. For me it’s like trying to find out who really killed Kennedy lol. A good mechanic is really like a detective Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-398383 Share on other sites More sharing options...
d9gdon Posted May 30, 2018 Share Posted May 30, 2018 Well, it's been three weeks now. What'd they find? Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399684 Share on other sites More sharing options...
RobM626 Posted May 30, 2018 Author Share Posted May 30, 2018 6 hours ago, d9gdon said: Well, it's been three weeks now. What'd they find? The flywheel was destroyed . Replaced it. The clutch was shot AGAIN.it was only wearing on the inside of the paddles. the driveshaft was put of balance so they balanced it and a wheel bearing was bad now the truck feels worst than before the motor is sending a pulsation that’s traveling through the tranny and rattling the hell out of the gears . The slapping when pressing and releasing accelerator is worst than ever. And my transmission is making horrible growling noises. Im trying to find a day that bring it back so he can drop tranny again, drop oil pan. And check out rears. I’m was so miserable about this situation I did t even post the update . Sorry Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399688 Share on other sites More sharing options...
fjh Posted May 30, 2018 Share Posted May 30, 2018 Bud its been along go And I don't remember the full parts change sheet did you replace the damper!Is it possible we have an over fueling situation on 1 cylinder! Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399701 Share on other sites More sharing options...
RobM626 Posted May 30, 2018 Author Share Posted May 30, 2018 7 minutes ago, fjh said: Bud its been along go And I don't remember the full parts change sheet did you replace the damper!Is it possible we have an over fueling situation on 1 cylinder! It has a new damper Since I got the truck back it’s giving me a whole new bunch of symptoms. The whole thing feels like it’s falling apart. The motor has more blow by than usual. It’s shaking more than ever. The tranny sounds like it’s about to blow. My tears feel like they’re screwed. The truck is a rolling disaster right now and I do t know where to start. I think I should light a match and call it a day i don’t understand how all these things just bombarded the truck in the past 2 weeks. I didn’t have a situation happen where it was like “oh no I blew a rear” or “oh no my tranny blew” it just keeps gradually getting worst to the point the trick is barely driveable Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399703 Share on other sites More sharing options...
fjh Posted May 30, 2018 Share Posted May 30, 2018 (edited) well it sounds like ya need to look into the blo by situation that don,t sound good is it puffing at the fill tube? if so you lkly got a bad hole! Edited May 30, 2018 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399705 Share on other sites More sharing options...
RobM626 Posted May 30, 2018 Author Share Posted May 30, 2018 1 minute ago, fjh said: well it sounds like ya need to look into the blo by situation that don,t sound good is it puffing at the fill tube? if so you lkly got a bad hole! It’s got light steam in the fill tube/ dip stick Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399707 Share on other sites More sharing options...
d9gdon Posted May 31, 2018 Share Posted May 31, 2018 (edited) That is a bad break. I was hoping that you found the problem and it was something simple. Wondering out loud that they didn't put the wrong damper on the truck? I guess if that was the case it would have shown up immediately after. Do the mechanics not road test it after it's been through the shop? Edited May 31, 2018 by d9gdon 1 Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399730 Share on other sites More sharing options...
RobM626 Posted May 31, 2018 Author Share Posted May 31, 2018 7 hours ago, d9gdon said: That is a bad break. I was hoping that you found the problem and it was something simple. Wondering out loud that they didn't put the wrong damper on the truck? I guess if that was the case it would have shown up immediately after. Do the mechanics not road test it after it's been through the shop? I personally bought the damper from mack. There was supposedly an update for etech engines . I believe the new one was bigger and has more bolt holes . They said I didnt have to change the hub. they road tested it this time and told me they think it’s in the motor but they don’t do motor work. i don’t understand how metals never show up in the oil samples. Blackstone always tells me my numbers are excellent with minimal wear. I’m starting to think these oil analysis’ are full of shit man and shame on all these mechanics to let me keep dumping all this money into a truck that’s not gonna be worth .02 cents once the motor blows up. After this recent bill the repairs totaled $40,000. I could’ve bought another truck Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-399743 Share on other sites More sharing options...
1965 Posted June 9, 2018 Share Posted June 9, 2018 Have they ran the engine with the transmission out? Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-400298 Share on other sites More sharing options...
1965 Posted June 9, 2018 Share Posted June 9, 2018 Your clutch wear is throwing I big loop in the deal for me. I didn’t go back & read all of it again but a fan clutch will cause a lot of vibration too. Don’t really see that causeing clutch wear like you have though. Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-400299 Share on other sites More sharing options...
RobM626 Posted June 10, 2018 Author Share Posted June 10, 2018 1 hour ago, 1965 said: Your clutch wear is throwing I big loop in the deal for me. I didn’t go back & read all of it again but a fan clutch will cause a lot of vibration too. Don’t really see that causeing clutch wear like you have though. Yea they ran motor without tranny in and there’s a slight vibration but it’s not as pronounced because it doesn’t have the tranny to travel through i replaced fan clutch couple months ago no change. im bringing the truck back to the last guy that worked on it and he told me he’s gonna drop tranny again and get it dynoed from rebuilder and checked out.. he said he’s gonna drop the oil pan too and see what’s going on up there. Although he won’t be able to fix it BC he doesn’t do motor work. The saga continues Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-400305 Share on other sites More sharing options...
1965 Posted June 10, 2018 Share Posted June 10, 2018 has this vibration been there since you’ve owned the truck? I’m not doubting you. Has the engine been into before? Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-400308 Share on other sites More sharing options...
RobM626 Posted June 10, 2018 Author Share Posted June 10, 2018 43 minutes ago, 1965 said: has this vibration been there since you’ve owned the truck? I’m not doubting you. Has the engine been into before? No it’s gotten progressively worst after different things that were done to the truck. An inframe was done like 4 years ago . After that the motor ran hotter than usual but ran good. A couple years ago I got hit in my yard with a loader and after I picked truck up from body shop I noticed my clutch was really soft and I had this spinning noise/vibration. I replaced clutch and then I started getting a slapping/clunking noise Everytime I shifted or pressed realeased accelerator. Shortly after that my cam shaft had two lobes that were shot . Replaced cam and rollers and then the motor never ran right since . Been downhill from there. Since then replaced half the components of the truck with the same problems keep coming back and always getting worst. I used to think it was one thing that the problem was. Now it’s looking like multiple serious things. i just changed flywheel. I think that was the cause of the premature clutch failures. Now I’m thinking my rears are what’s causing tranny damage. I think the clunking slapping I’m feeling in the tranny is the rears and it’s sending like shock load to the transmission and the clutch. The motor is a whole another mess now. Quote Link to comment https://www.bigmacktrucks.com/topic/52659-vibration-that-2-mechanics-and-mack-dealer-can%E2%80%99t-figure-out/page/10/#findComment-400313 Share on other sites More sharing options...
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