i HAVE AN 1987 CUMMIS NT ENGINE WITH A MISS I NEED TO FIND THE MISS AND READJUST THE OVERHEAD. I USE To HAVE THE SETTINGS BUT LOST THEM ..........I NEED THE SPECS TO PROPERLY DO THE JOB.... THIS HAS NOT BEEN MY MONTH FOR CUMINS ENGINES VERY UPSET.
good morning I will try and help you please do not rate how poorly the website has treated you only rate my answers to you please.I just need to know one thing is this a big cam or small cam?
I think it is a big Cam if not let me know spankyYou will need to find A,B,& C on your accessory drive pulley. The marks will be near the front cover on the pulley. Also,you will see a arrow like pointer on the cover. That is what you line the marks up with. You then will set the valve lash to .011 on the intake and .023 on the exhaust. The intake valves are the center ones under each valve cover. You will set the lash in this order.You verify where to start by determining which set of valves are closed, meaning which rocker arms are loose.The injectors should be set to 6in.lb. or snug with a screwdriver. Any other questions feel free to reply to experts.Valve Inj.A 3 6B 6 2C 2 4A 4 1B 1 5C 5 3 Outer Base Circle (OBC) Injector and Valve Adjustment Sequence Bar Engine inDirection of Rotation Pulley Position A<B<C
I have the sn 11426950 , I saw that same procedure on another fellers answer, I'd do not recall that setting from the last time I did it. How do I find a bad injector?
good morning the reason why you don't remember it is it used to be done with a dial indicator but now it is changed.The best way to find the miss is pull the exhaust manifold and turbo plug the oil feed line and then you will be able to see which cylinder is missing it will either be cold or will be smoking once you have the manifold off it is very easy to tell which cylinder.If you have any other questions feel free to ask me anytime thank you Spanky
I don't think that is correct, I never used a indicator before. That seems like a lot of work just to find a bad injector.
THAT DID NOT WORK IT NOW RINS WORSE AND SMOKES
what do you mean that did not work? And the only difference between what is now in what was then is it used to be 5 to 6 inch pound Tourque wrench that was for top stop injectors is that what you have a small cam? look at your cam side off engine and tell me how wide they are about a foot long and 21/2" or are they 4" wide?
I gave you the sn of the engine ! YES they are big,
Ok then yes you have to pull exhaust to find the miss you can not bottom out injectors like you used to be able to do.B rite back
THAT IS TOO MUCH WORK,IS THERE SOMEOTHER WAY? IDID AS YOU TOLD ME ON THE ADJUSTMENT AND IT IS WORSE!!
I don't have access to Cummins computers I have to go by what you said it was a nt.nt stands for naturally aspirated, turbocharger you have a NHT which is a big cam engine I gave you specs for an NT engine.So please hold on and I will tell you how to do it the correct way
Outer Base Circle (OBC) Injector and Valve Adjustment Sequence Bar Engine inDirection of Rotation Pulley Position A<B<C position a =you will adjust valves and injector on either number one or number six which ever has loose valves you adjust the valves and injector on the same cylinder.a=1-6b=2-5c=3-4intake valves are set to .011"exhaust valves are set to.023"injector is set to= bottom injector out 2 to 3 times to push out fuel once you find zero Lash back off half turn and lock down lock nut.so as not to get confused the firing order is 1,5,3,6,2,4 you set valves and injector on same cylinder not like the small cam were you do it the other way.You can start on any number just make sure you finish with same number to double check.I apologize for the confusion before you do adjustments back off injectors 1 turn then go ahead and adjust this way.
Thanks I think I'm going to get a second option from drcummins, other experts, I do not have a good feeling about these answers
I will pm him for you hold on and you can also check for a miss with a laser heat sensor it is hand held and you just point at it to get temperature
I did not hear from someone yet! I need this job done today!
I tried to pm him but it would not go through but I am Cummins Certified the last answer is correct
Relist: Inaccurate answer.Seems unsure on correct setting, messed my engine up worse
Hello and welcome to Just Answer! I would be more than happy to assist you today.Please let me review the question and answers from the other expert.
Wow intresting answers. I see why your engine worse now and if you set it as per the last setting given it would of been worse as that setting for the injectors is only used on Electronic engines not STC....Spanky is a good expert and i don't think he would seer you wrong.Anyway I see you have a Big Cam IV engine 444. And the setting are diffrent that you were told. Here are the correct settings dc. for your engine
Exhaust valve .27 thousands
Intake valve .14 thousands
Injector adjustment 105 inlbs.
To properly find a miss on these these engines use a temp gun on each exhaust port with the manifoild installed. Look for the cold or hottest cylinder.
Also since these are step timing controled injectors you CAN short them out by running the engine and useing a wrench on the adjustment lock nut for the injector. Press the rocker lever toward the inj to cut it out , you can hear a change in the engine. No change bad injector. if you need a new injector here is the part number
Please let me know if i can help further.
All types of Cummins applications
Let me try it
ok i will be here. make sure there is no push tube damage, you can inspect each one while settying
Thank you very much!! The miss is gone and the engine sounds perfect as the day I bought it. Glad I received a good answer. Push tubes look ok. Thanks a again .....Steve
Your welcome..That is why i'm here. I will be leaving for the night and will look over your other question asap.
Take your time, your the BEST!
Hello I just wanted to say I am sorry for incorrect answer I gave you. I should off gotten the modal# XXXXX your engine before giving you a answer that was clearly my fault,and I am truly sorry! I'm glad it worked out and you are correct, dr cummins is the best on Cummins engines we have here at JA&Pearl.This was My first mistake since I became a expert on this sight I learned a valuable lesson, and I won't do it again,I know that does not help you but thanks to dr cummins for bailing me out I hope to return his great deed at another time,Again I apologize for the extra work and worry I have caused you. sincerally spanky
Relist: Answer quality.Poor excuse from spanky