Steve Catlett Posted April 10, 2014 Share Posted April 10, 2014 I have a cxn 613. let me start by saying that 2 exhaust manifold studs were broken and replaced. upon reassembly now the turbo screams really really loud the actuator upon building air pressure is stuck all the way down. unplug the actuator and the turbo wont spool. the turbo was replaced not long ago at the local dealer. ive checked for loose hoses and tightness of all clamps. did the control box that controls actuator go bad sitting or did the actuator go bad ? im lost and dont want to throw parts at a problem to fix it. Any ideas would be greatly appreciated. thanks Quote Link to comment https://www.bigmacktrucks.com/topic/35365-turbo-screaming/ Share on other sites More sharing options...
Ditka4Life Posted April 16, 2014 Share Posted April 16, 2014 I have a 2004 just had ex manifold and studs done, now my turbo screams also. Hopefully someone on hear can help us Quote Link to comment https://www.bigmacktrucks.com/topic/35365-turbo-screaming/#findComment-242241 Share on other sites More sharing options...
Ditka4Life Posted April 16, 2014 Share Posted April 16, 2014 I'm beginning to wonder if they didn't prelube and spin the turbo after they had it off Quote Link to comment https://www.bigmacktrucks.com/topic/35365-turbo-screaming/#findComment-242243 Share on other sites More sharing options...
rsb502 Posted April 17, 2014 Share Posted April 17, 2014 So does the truck run good? does it show any codes? do you have a boost guage and what are you getting under a load? if I remember right any issues with the actuator will pop a code in the ecm and youll get a check engine light, also if the turbo was having issues you wouldnt make much power. 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/35365-turbo-screaming/#findComment-242287 Share on other sites More sharing options...
mowerman Posted April 17, 2014 Share Posted April 17, 2014 I'm beginning to wonder if they didn't prelube and spin the turbo after they had it offshould try takin it back to them...,,,mack used to be pretty good with warranty,s.good luck...bob Quote Link to comment https://www.bigmacktrucks.com/topic/35365-turbo-screaming/#findComment-242291 Share on other sites More sharing options...
mackmechanic15 Posted April 18, 2014 Share Posted April 18, 2014 I run a mack dealer and let me tell u some inside info. These engines are so bad for this and hardware has been updated a few times. This makes tje squeal but sometimes after the turbo mount leaks and does it. If done at dealer one year warranty. Proper mack proceedure is to check straightness between the heads and check for smoothness of heads. They may tell u the heads need to come off to fixed right and keep warranty. This does help but i find they still come back in a year or so. Heavy haul trucks always have problems leaking. Personally i wouldnt take heads off for this and would just reuse hardware. Replace gasketa every so often. Also mack procedure is to replace all the high pressure lines but this is eight hundred bucks. If lines are new style there is no need. Long story on that one. Quote Link to comment https://www.bigmacktrucks.com/topic/35365-turbo-screaming/#findComment-242517 Share on other sites More sharing options...
Dirtymilkman Posted April 19, 2014 Share Posted April 19, 2014 Hey mackmechanic, nice hearing your input. You have any good or bad news on the mp10? Do the new ones have any issued? Quote Link to comment https://www.bigmacktrucks.com/topic/35365-turbo-screaming/#findComment-242591 Share on other sites More sharing options...
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