JumperAndSon Posted December 14, 2012 Share Posted December 14, 2012 Today I went out and did some investigating on my almighty 8V71, only to find that I am facing every Detroit Diesel owner's worst nightmare: A STUCK RACK (Gasp!!!) So I'm wondering what the magical technique I can use to cure this dilema so as to not get a connecting rod in my stomach when I go to fire it up. Is there way to break the injectors loose without using any extra special tools? If not, where can I get an injector tool? I want to move towards getting this motor running and that is a major setback. So if anybody knows the cure, could you please enlighten me? Thanks a lot Ben Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/ Share on other sites More sharing options...
rsb502 Posted December 15, 2012 Share Posted December 15, 2012 get some valve cover gaskets and pop the covers athen you will be able to work the rack by handshould be able to see the issue, I have had some luck just tapping the injector with a small brass hammer after coating the rack with penetrating oil, we have a ton of Detroits here at CSX everything from 3-53's to 8-92's and I have seen a stuck rack about 10 times so far after a machine has sat in the weeds unused for a while most can be tapped and poked and prodded back to life. 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/28847-i-need-the-cure-for-my-detroit/#findComment-151200 Share on other sites More sharing options...
JumperAndSon Posted December 15, 2012 Author Share Posted December 15, 2012 get some valve cover gaskets and pop the covers athen you will be able to work the rack by handshould be able to see the issue, I have had some luck just tapping the injector with a small brass hammer after coating the rack with penetrating oil, we have a ton of Detroits here at CSX everything from 3-53's to 8-92's and I have seen a stuck rack about 10 times so far after a machine has sat in the weeds unused for a while most can be tapped and poked and prodded back to life.Well I figured out that it's the right side rack that's stuck. I tried taking a small piece of wood and tapped it with a hammer but the rack didn't move. I didn't wanna hit it too hard for fear of bending/breaking something. What doesn't make sense to me is that it seems like all 4 of the injectors on that side are loose but the rack still isn't moving. Why would that be? About 3 months ago I checked and everthing was free so it just locked up recently.Ben Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151215 Share on other sites More sharing options...
1958 F.W.D. Posted December 15, 2012 Share Posted December 15, 2012 So if anybody knows the cure, could you please enlighten me? Thanks a lot :Hmmmmm.....I figure about 3-4lbs of C-4 should do it. 2 Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151219 Share on other sites More sharing options...
JumperAndSon Posted December 15, 2012 Author Share Posted December 15, 2012 Hmmmmm.....I figure about 3-4lbs of C-4 should do it.Violence is never the answer Ben Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151231 Share on other sites More sharing options...
umodelnut Posted December 15, 2012 Share Posted December 15, 2012 Ahh, dont feel bad cousin. That 8v71 wouldnt feel a thing... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151341 Share on other sites More sharing options...
1958 F.W.D. Posted December 15, 2012 Share Posted December 15, 2012 Violence is never the answer BenNo, violence would be taking a 20lb sledge hammer to it. 1 Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151345 Share on other sites More sharing options...
JumperAndSon Posted December 15, 2012 Author Share Posted December 15, 2012 So what you're saying is............if the rack is still stuck after the 4 lbs. of C4, then try a 20lb. sledge? How should I shape the charge to dislodge the rack? Like a triangle to concentrate the force? Like a little bunny rabbit friend of the gopher?Tim 1 Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151349 Share on other sites More sharing options...
leversole Posted December 15, 2012 Share Posted December 15, 2012 Like a little bunny rabbit friend of the gopher?TimNice Caddyshack reference! Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151350 Share on other sites More sharing options...
1958 F.W.D. Posted December 15, 2012 Share Posted December 15, 2012 So what you're saying is............if the rack is still stuck after the 4 lbs. of C4, then try a 20lb. sledge? How should I shape the charge to dislodge the rack? Like a triangle to concentrate the force? Like a little bunny rabbit friend of the gopher?TimTake the 4 lb block of C-4 and place it on the side of the engine block, stand back about 1000 yards and detonate and that should un-stick the rack and cure the oil leaks as well. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151351 Share on other sites More sharing options...
vision386 Posted December 16, 2012 Share Posted December 16, 2012 A detroit can also be used for its OTHER intended purpose,moved from the rear,to the front of the ship.........................................Mark 2 Quote Mack Truck literate. Computer illiterate. Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151368 Share on other sites More sharing options...
1958 F.W.D. Posted December 16, 2012 Share Posted December 16, 2012 A detroit can also be used for its OTHER intended purpose,moved from the rear,to the front of the ship.........................................MarkMark, this is true however if used for that purpose it should only be after emptying the crankcase of oil and giving the whole oily thing a good through steam cleaning, wouldnt want to pollute 12 miles of shoreline. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151424 Share on other sites More sharing options...
umodelnut Posted December 16, 2012 Share Posted December 16, 2012 Hey Ben, if you fire that motor up, you gotta get a video. Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151475 Share on other sites More sharing options...
NoClueJoe66 Posted December 16, 2012 Share Posted December 16, 2012 Nice Caddyshack reference!Hey Mr. Gopher....this is your friend Mr. Rabbit, Dont worry about these wires they are doctors orders Quote This message was brought to you by Hargraves Potted Meat Product. Chopped full of "Peckers & Lips" since 1933 - John Boy & Billy Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151480 Share on other sites More sharing options...
1958 F.W.D. Posted December 16, 2012 Share Posted December 16, 2012 Varmint-Cong....... Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151486 Share on other sites More sharing options...
NoClueJoe66 Posted December 16, 2012 Share Posted December 16, 2012 Classic flick Quote This message was brought to you by Hargraves Potted Meat Product. Chopped full of "Peckers & Lips" since 1933 - John Boy & Billy Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151487 Share on other sites More sharing options...
vision386 Posted December 16, 2012 Share Posted December 16, 2012 Mark, this is true however if used for that purpose it should only be after emptying the crankcase of oil and giving the whole oily thing a good through steam cleaning, wouldnt want to pollute 12 miles of shoreline.You are correct,perhaps i should have issued an EPA warning/disclaimer! think of the poor fish,seals and everything else poisoned by oil!..............................Mark Quote Mack Truck literate. Computer illiterate. Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151526 Share on other sites More sharing options...
JumperAndSon Posted December 17, 2012 Author Share Posted December 17, 2012 So I should blow it up with C4 then pound all the pieces back together with a 20lb sledgehammer so I can use it for a boat anchor?Ben Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151537 Share on other sites More sharing options...
1958 F.W.D. Posted December 17, 2012 Share Posted December 17, 2012 So I should blow it up with C4 then pound all the pieces back together with a 20lb sledgehammer so I can use it for a boat anchor?BenYes, this is an industry-accepted practice for 2-stroke Detroits. 1 Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151542 Share on other sites More sharing options...
farmer52 Posted December 17, 2012 Share Posted December 17, 2012 So I should blow it up with C4 then pound all the pieces back together with a 20lb sledgehammer so I can use it for a boat anchor?BenYou could just go staight to "boat anchor" and save time. As for the oil, it likely already leaked out. Another option is a lawn ornament. On a serious note, if the injector racks are free, then the linkage is stuck. Try spraying Blaster on all the moving parts and let them soak for a few days. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151555 Share on other sites More sharing options...
BC Mack Posted December 17, 2012 Share Posted December 17, 2012 Ben... hold off on the C4..!!!!do you have the later Injector Control Tubes with the individual spring-loaded rack levers???the older rigid tube/lever jammed all injectors if one stuck, newer type elimanted this issue, though you still have to deal with the injector that is stuck..generally, if the newer individual spring tubes are installed the air intake flap can be deleted...if you have the DD V71 bible.. it is chapter 2.9 of the service manualBC Mack Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151593 Share on other sites More sharing options...
1958 F.W.D. Posted December 17, 2012 Share Posted December 17, 2012 Ben... hold off on the C4..!!!!no no no no no dont hold off....in fact bump the recipe up to 5lbs.....works all that much better and quicker, trust me! Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151642 Share on other sites More sharing options...
oilburner Posted December 17, 2012 Share Posted December 17, 2012 Hell! them old detriots were so tough i don't thank c4 would do nothing but black up the side of the block, it would probly land back on the ground runing, and yes it would be leaking a little oil out of the inspection plates!!LOL 1 Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151694 Share on other sites More sharing options...
JumperAndSon Posted December 18, 2012 Author Share Posted December 18, 2012 I was feeling kind of crummy (my back is out) until I read this thread. You guys remind me why this is a great site! Thanks, TimBTW FWD, I think you're just jealous. We have extra Detroits if you want to come over to the dark side Quote Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151754 Share on other sites More sharing options...
1958 F.W.D. Posted December 18, 2012 Share Posted December 18, 2012 BTW FWD, I think you're just jealous. We have extra Detroits if you want to come over to the dark side I dont think thats going to happen. I know I told Ben this joke once, but in case if you missed it- "Whats the difference between a green banana and a Detroit? They aint worth a shit until they turn (cat) yellow!!!!! 1 Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/28847-i-need-the-cure-for-my-detroit/#findComment-151789 Share on other sites More sharing options...
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