ranchhopper Posted December 6, 2015 Share Posted December 6, 2015 I finally got the engine all together after getting my injectors back put on fresh fuel filters got the lines all pumping fuel at the injectors and no start will fire on a tiny whiff of ether but will not fire up. The exhaust will pump out clouds of white smoke so its getting fuel my friend who is a mechanic where I work says its probably out of time the valves have all been adjusted so now what. I have no idea how to time this thing in the driveway but that's what we think burnt the pistons up is improper timing but I have no idea where to go next any suggestions would be appreciated not a very happy day here. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/ Share on other sites More sharing options...
ranchhopper Posted December 6, 2015 Author Share Posted December 6, 2015 We think we may have the problem at least diagnosed looks like they had the pump off at one time but they never took the front inspection plate off (factory seal still intact) so I took it off and saw the timing plate was all the way to one side of the adjustment slots. I loosened the bolts and moved it from one side of the slots to the other still wont start still puts out the white exhaust so my mechanic friend says the dumb asses probably have it in one tooth off. Its like when you put a distributor in a gas engine one tooth off and have to clock the distributor all the way in one direction to get it to run but its just a bit to far off to start and run good. So now Im going to have to take the pump off and try to get everything adjusted right so it runs good enough to get it to a pro so it can be timed the right way its always something but that's what you get when you buy a truck with the top end of the engine already taken apart putting something back together when someone else takes it apart is always a clusterf!!!k. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314518 Share on other sites More sharing options...
Challenger Posted December 6, 2015 Share Posted December 6, 2015 Yes it is. But it sounds like you have a solid plan to get it running again. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314521 Share on other sites More sharing options...
1958 F.W.D. Posted December 6, 2015 Share Posted December 6, 2015 Adjust the dwell? 1 Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314522 Share on other sites More sharing options...
ranchhopper Posted December 6, 2015 Author Share Posted December 6, 2015 Im going to take all the lines off the pump and my mechanic friend will pull the pump and get it where it belongs he says there is a coupler on the front of the pump with a roll pin locator he says sometimes if it doesn't quite line up the pump will start then stop with 1/4 to 3/8 inch gap then the pump can be forced on by drawing it in with the bolts he has seen that happen before. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314531 Share on other sites More sharing options...
farmer52 Posted December 6, 2015 Share Posted December 6, 2015 Agree, sounds like a timing issue and you have a good plan. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314534 Share on other sites More sharing options...
Back In Black Pulling Posted December 7, 2015 Share Posted December 7, 2015 Inline or v pump ? Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314720 Share on other sites More sharing options...
ranchhopper Posted December 7, 2015 Author Share Posted December 7, 2015 Inline Robert Bosch pump. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314727 Share on other sites More sharing options...
Back In Black Pulling Posted December 8, 2015 Share Posted December 8, 2015 Thats what i thought havent worked on one of thous yet.Think you need a timing light to find #1 port closing . There is a plug some where on pump where there is a little hump on cam to indicate port closing. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314736 Share on other sites More sharing options...
ranchhopper Posted December 8, 2015 Author Share Posted December 8, 2015 My friend is going to pull the pump tomorrow and see if its been installed one tooth off that will let me know what I need to do next. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-314773 Share on other sites More sharing options...
Popular Post ranchhopper Posted December 10, 2015 Author Popular Post Share Posted December 10, 2015 We pulled the pump yesterday as expected the drive gear was one tooth off the IP had been forced on with the bolts drawing the pump onto the engine pushing the roll pin into the bakelite drive gear one tooth off. I will take some pictures when I bring the gear home from work the moral of this story if your putting the pump back on the engine and it doesn't slide together easily DONT force it together using the mounting bolts to draw it tight. 6 Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315141 Share on other sites More sharing options...
theakerstwo Posted December 11, 2015 Share Posted December 11, 2015 Some guys just need not to pick up tools. 2 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315152 Share on other sites More sharing options...
ranchhopper Posted December 11, 2015 Author Share Posted December 11, 2015 This thing has been one cobbled together mess after another. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315176 Share on other sites More sharing options...
gearhead204 Posted December 11, 2015 Share Posted December 11, 2015 sounds like you found your problem, but I would still flow time it to make sure that the timing is proper. I would hate to see it burn another piston. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315250 Share on other sites More sharing options...
mrsmackpaul Posted December 11, 2015 Share Posted December 11, 2015 Im pretty sure we are talking about the same thing spill timing should be done any time a different pump is installed or at least thats what I was taught it takes two people to adjust it one on the crank with breaker bar slowly turn the motor over the other pumping the lift pump and watching the fuel cut off on number at the injector pump need to pull the valve on the injector pump first on number onesomeone on here no doubt can provide the proper Mack literature so you can see how it is meant to be done and it can be done at at home ok no special tools neededPaul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315256 Share on other sites More sharing options...
ranchhopper Posted December 11, 2015 Author Share Posted December 11, 2015 Im going to take it in and have it flow timed. Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315272 Share on other sites More sharing options...
Vladislav Posted December 12, 2015 Share Posted December 12, 2015 Mrsmackpaul said how it might be done on many old day's diesels.You need to turn off the #1 "top fitting" on the pump i.e. valve holder body, the part wich #1 injector line is attached to.Than take out a valve stem (don't touch it by thingers and keep absolutely clean) and drive the body back.For the best you need a half of a injector line (or just an old one) U-formed to put onto the valve body (port #1 of the pump).One end of that pipe is on the #1 port and another is free and near an empty can.Than pumping by hand prime pump you will see fuel coming out of that line into the can.Turning pump's drive shaft you will find a moment the fuel stops to drop out and become again if drive the shaft back.The very moment the fuel stops run is the beginning of the #1 pump section getting pressure to injector line.Putting the pump of that condition onto the engine with the crank on the injection mark makes the deal.You need to double check it when installed and correct along the flange if needed.The matter of things is a plunger it its burrel. Plunger goes up being forced by pump's cam shaft. At some point it covers the fuel intake hole in the burrel's side. After the hole is covered plunger forces the fuel up. And it has no way but into injector line. That's the injection start point.When you pump fuel by prime pump you forces it to plunger barrels. It comes to the input holes in the barrel walls and can come inside if a plunger is below the hole. The valve above the burrel doesn't allow the fuel to come into the line until high pressure is achieved so you need to remove it. With no valve fuel comes out of the pump port and you see it. Turning drive shaft you get the #1 plunger near the intake hole and that moment located indicates the correct drive shaft position.Hope you can and want to understand it. 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315417 Share on other sites More sharing options...
mrsmackpaul Posted December 12, 2015 Share Posted December 12, 2015 Vlad a Russian writing english has done a much better job of explaining than this Australian could ever do thanks for that mate and that is the way I have done it and check it half a dozen times after woulds just to make sure it dosnt cost anything except time and some beer for your mate pulling the engine over by hand and is 100% spot on when done right Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315424 Share on other sites More sharing options...
Vladislav Posted December 12, 2015 Share Posted December 12, 2015 Thanks for the comment Paul,I was worrying any body could figure out any good figure out of what I posted I would note it doesn't cost a penny spent but the most important it guarantees you have the job done and you know it was done right.Cheers from white fly neighbourhood mate! 2 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315441 Share on other sites More sharing options...
Popular Post ranchhopper Posted December 12, 2015 Author Popular Post Share Posted December 12, 2015 Yes they call that bubble or flow timed I have a friend who owns a diesel shop he said he would do it for me he does it for a living he will do a much better job than I will. I got the pump back in everything primed and it started right up good oil pressure sounds good so alls well now my first mack rebuild is a success. 5 Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315463 Share on other sites More sharing options...
carlotpilot Posted December 12, 2015 Share Posted December 12, 2015 We pulled the pump yesterday as expected the drive gear was one tooth off the IP had been forced on with the bolts drawing the pump onto the engine pushing the roll pin into the bakelite drive gear one tooth off. I will take some pictures when I bring the gear home from work the moral of this story if your putting the pump back on the engine and it doesn't slide together easily DONT force it together using the mounting bolts to draw it tight.please don`t force it get a much bigger hammer 1 Quote Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315470 Share on other sites More sharing options...
theakerstwo Posted December 13, 2015 Share Posted December 13, 2015 Also make sure the stop is push in and gas pedal is mashed down. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/42975-engine-no-start-after-rebuild/#findComment-315497 Share on other sites More sharing options...
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