terry Posted August 25 Share Posted August 25 Does this engine have a turbo? terry Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581440 Share on other sites More sharing options...
Joey Mack Posted August 25 Author Share Posted August 25 Yes.. it is stamped ENDT. i assume you are asking about the manifold having the oil port for the turbo? Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581441 Share on other sites More sharing options...
mechohaulic Posted August 26 Share Posted August 26 4 hours ago, terry said: Does this block have piston cooler nozzles? Terry should ???? Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581448 Share on other sites More sharing options...
mechohaulic Posted August 26 Share Posted August 26 4 hours ago, Joey Mack said: No piston cooling nozzles, i mounted the oil manifold today. I wasnt holding my tongue right. Thanks for checking in on this. Truth is ,,,, since i never built one of these, the bolt-on stuff was a challenge for me. Crazy part is that i built the long block without a concern. I guess because i have built more than 30 Mack engines after 1989, and saw a lot of similar/standard procedures. If that makes sense. My wife says, I doubt myself too much. Anyway.. I will be back here when I flow time the injection pump. Im greatful for you guys.. Jojo keep in mind , there is a BIG difference between "doubting myself VS questioning myself.. doubt means __ don't think I can !!!! questioning ones self means to double check a persons work (which is acceptable !!!! after this build a positive is __you can NEVER say "I never build one before" 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581449 Share on other sites More sharing options...
fjh Posted August 26 Share Posted August 26 6 hours ago, Joey Mack said: No piston cooling nozzles, i mounted the oil manifold today. I wasnt holding my tongue right. Thanks for checking in on this. Truth is ,,,, since i never built one of these, the bolt-on stuff was a challenge for me. Crazy part is that i built the long block without a concern. I guess because i have built more than 30 Mack engines after 1989, and saw a lot of similar/standard procedures. If that makes sense. My wife says, I doubt myself too much. Anyway.. I will be back here when I flow time the injection pump. Im greatful for you guys.. Jojo Yup You got this bro! no doubt in my mind! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581456 Share on other sites More sharing options...
Popular Post Freightrain Posted August 26 Popular Post Share Posted August 26 Just got to reading this. My 300+ is an ESI, so I can post a picture of my mounting pad to compare to your 673T. I know there are some subtle differences in these mounts and oil holes. My old 673 I put spin ons but it was non turbo so I had to find spin on filters without the oil hole(from 711 motor) and no oil cooler. 3 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581461 Share on other sites More sharing options...
terry Posted August 26 Share Posted August 26 17 hours ago, Joey Mack said: Yes.. it is stamped ENDT. i assume you are asking about the manifold having the oil port for the turbo? On a engine with the spin on filters the turbo feed comes off of top of the filter heads, and the older engines with the big full flow/bypass filter the turbo feed comes off that pad on the side of the block? terry 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581466 Share on other sites More sharing options...
Joey Mack Posted Tuesday at 09:38 PM Author Share Posted Tuesday at 09:38 PM So i went to my book. The flow timing pump used, puts out 750 PSI. I dont have that. It also said the the removal of the delivery valve to spill time it is an Emergency method. Ok, whatever... I listen to you guys who have done this before. The inj. Pump i have is rebuilt. If i remove the #1 del.valve to do spill timing, will i hurt any of the work done to rebuild it? and can I use my 10 PSI electric fuel pump to supply the fuel to spill time it ? Also, the book showed using air pressure with the out put line in a bottle of water, and watching for bubbles. I have an air drier, so i can keep water out of the air flow. Personally, i hope my small fuel pump is good enough because i would rather push diesel through it than air. What say you guys ? Thank you vey much for helping me with this.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581478 Share on other sites More sharing options...
Geoff Weeks Posted Tuesday at 10:49 PM Share Posted Tuesday at 10:49 PM I think the reason for the difference is that by leaving the delivery valve spring in place, you take into account any leakage in the plunger on the pump when you see the fuel. Spill timing is accurate as to when the port closes on the plunger, but there are other aspects that determine exactly when nozzles start spraying fuel. It is kinda like the difference between setting points by gap or dwell. Both can give good results, one is more accurate. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581484 Share on other sites More sharing options...
Joey Mack Posted Tuesday at 10:52 PM Author Share Posted Tuesday at 10:52 PM Well, as long as I dont set the pump too hot and risk burning a piston,i will be ok. This truck is a restoration, and will likely see parades, and shows not hauling loads.. Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581485 Share on other sites More sharing options...
Geoff Weeks Posted Tuesday at 10:58 PM Share Posted Tuesday at 10:58 PM Well I think your eyes and the view of the timing mark will have a much bigger effect then the differences between spill and flow. There is a device that will trigger a timing light off an injector line, which would allow you to strobe check, then the issue is if there is an advance unit that would be effected by engine speed. I have a injector pipe that is cut at an angle so you can see exactly when the fuel start out the pipe, it is bent so it is almost horizontal, so a bead of fuel at the end of the pipe is visible. Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581486 Share on other sites More sharing options...
Joey Mack Posted Tuesday at 11:04 PM Author Share Posted Tuesday at 11:04 PM Well my pump is on the bench. I thought i was supposed to set the pump up on the bench, them set the engine to Zero BTC on #1 then install the pump, then back the engine up 30+ degrees and check the port closing against the degrees on the flywheel. Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581487 Share on other sites More sharing options...
Geoff Weeks Posted Tuesday at 11:44 PM Share Posted Tuesday at 11:44 PM I think fjh covered it one page one. The internal setting up of the pump is done on a pump stand, all you do when putting on the engine is set the timing. I don't know what you are looking to do on the bench? Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581488 Share on other sites More sharing options...
Joey Mack Posted Tuesday at 11:50 PM Author Share Posted Tuesday at 11:50 PM Bench timing . Like i used to do with Robert Bosch pumps that had TEM port. Just thought the pump needed to be pre-set before mounting it to the engine with the engine barred to the degrees on the data plate at BTDC. Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581489 Share on other sites More sharing options...
Geoff Weeks Posted Wednesday at 12:08 AM Share Posted Wednesday at 12:08 AM What is important is when it injects on the engine, anything prior to installing on the engine is just to make sure you are in the "window" where it can be adjusted when installing. May be the Bosch pumps are done different (Robert or American) I don't know, but the various inlines I have done, it was get it on the engine in the aprox correct position, then spill time to the engines timing marks. Inlines that I have done, if the engine gears are properly timed on assembly, then the "double spline" will be in the correct orientation so when the pump is fitted, you can move it in the slotted holes to bring into time for that engine spec. Someone mentioned looking through the big plug on the side, to look at the coupler. I am not going to say more because I don't have enough experience on exactly what you are working on. If it were I, I set the pump so it was at injection #1 and the engine the same, and slide the pump home, then check via spill time, and adjust as required. If I was way off, I may have to shift the coupler spline one notch, but that assumes there isn't a double spline (which has happened to me a time or two) to guide me. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581493 Share on other sites More sharing options...
Popular Post fjh Posted Wednesday at 02:54 AM Popular Post Share Posted Wednesday at 02:54 AM 3 hours ago, Joey Mack said: Bench timing . Like i used to do with Robert Bosch pumps that had TEM port. Just thought the pump needed to be pre-set before mounting it to the engine with the engine barred to the degrees on the data plate at BTDC. Joey please no offence but your over thinking it ! Put pump on so the dowel pin is aligned then time as discribed your not going to be off enough to burn up a parade truck your fussing 🙏 just assume the pump shop has done there job the pump cam is keyed this will turn out fine you got the skills!👍 1 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581497 Share on other sites More sharing options...
Popular Post Joey Mack Posted Wednesday at 09:06 AM Author Popular Post Share Posted Wednesday at 09:06 AM Thank you. I agree, I am over thinking it. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581500 Share on other sites More sharing options...
JoeH Posted Thursday at 01:59 PM Share Posted Thursday at 01:59 PM On 8/24/2025 at 4:53 PM, Joey Mack said: Is it possible that the mounting on the block is the same as well as the porting,and the manifold that mounts to it determines if it is ESI or not as well as having an oil port for a turbo? Im not sure that you have an ESI engine. Your block is different from all of my ESI and ESI+ engines. I dont have the piece with the green masking tape on it in your pictures. Most of my ENDT engines have spin on filters, but I do have one with a different filter set up with hoses running weird places, much like I suspect you have there. I haven't looked at it to compare the block on that engine to yours. Can't upload pictures for some reason. Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581575 Share on other sites More sharing options...
mechohaulic Posted Thursday at 02:15 PM Share Posted Thursday at 02:15 PM 12 minutes ago, JoeH said: Im not sure that you have an ESI engine. Your block is different from all of my ESI and ESI+ engines. I dont have the piece with the green masking tape on it in your pictures. Most of my ENDT engines have spin on filters, but I do have one with a different filter set up with hoses running weird places, much like I suspect you have there. I haven't looked at it to compare the block on that engine to yours. Can't upload pictures for some reason. piece with green tape is the pressure regulator which should bolt to block. flip the piece over will match the holes +- of block. 4 bolt holes line up . gasket in hand goes with it 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581578 Share on other sites More sharing options...
Joey Mack Posted Thursday at 02:23 PM Author Share Posted Thursday at 02:23 PM Its mounted.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581579 Share on other sites More sharing options...
mechohaulic Posted Thursday at 10:19 PM Share Posted Thursday at 10:19 PM 8 hours ago, JoeH said: Im not sure that you have an ESI engine. Your block is different from all of my ESI and ESI+ engines. I dont have the piece with the green masking tape on it in your pictures. Most of my ENDT engines have spin on filters, but I do have one with a different filter set up with hoses running weird places, much like I suspect you have there. I haven't looked at it to compare the block on that engine to yours. Can't upload pictures for some reason. If I am thinking right ! ( really after two yukon jacks );; esi is for Extended Service Intervals . ==2 spin on oil filters :: the ESI + is 3 spin on filters ??? . don't recall where the main feed line to older large filter went to engine block ?/ Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581611 Share on other sites More sharing options...
Joey Mack Posted Saturday at 05:35 PM Author Share Posted Saturday at 05:35 PM 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581775 Share on other sites More sharing options...
Joey Mack Posted Saturday at 05:41 PM Author Share Posted Saturday at 05:41 PM Well,I guess I got it right. The timing is set to 29 BTC.. I rolled the engine backwards then brought it to 29 BTC. The Injection pump must have been set right, because it slid over the line up bolts andright into the coupling.. As you can see, I wrapped it up for transport. There is still a lot to do, but all the parts are being painted before mounting. I expect that I will have to go there and do more to finish it. I rewarded myself with an ice cold 🍺.,, and Even My Buddy Mack came to congradulate me.. 🐕 I am greatful for all the help I got on this thread. Too bad I cant give credit to more than one of you for the solution, so I am also Marking fjh as having the solution too. Truly greatful, Jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581776 Share on other sites More sharing options...
fjh Posted yesterday at 01:02 AM Share Posted yesterday at 01:02 AM 7 hours ago, Joey Mack said: Well,I guess I got it right. The timing is set to 29 BTC.. I rolled the engine backwards then brought it to 29 BTC. The Injection pump must have been set right, because it slid over the line up bolts andright into the coupling.. As you can see, I wrapped it up for transport. There is still a lot to do, but all the parts are being painted before mounting. I expect that I will have to go there and do more to finish it. I rewarded myself with an ice cold 🍺.,, and Even My Buddy Mack came to congradulate me.. 🐕 I am greatful for all the help I got on this thread. Too bad I cant give credit to more than one of you for the solution, so I am also Marking fjh as having the solution too. Truly greatful, Jojo Buddy there was no doubt in my mind what so ever! They got the right guy on the job! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581791 Share on other sites More sharing options...
mechohaulic Posted yesterday at 01:11 AM Share Posted yesterday at 01:11 AM 7 hours ago, Joey Mack said: Well,I guess I got it right. The timing is set to 29 BTC.. I rolled the engine backwards then brought it to 29 BTC. The Injection pump must have been set right, because it slid over the line up bolts andright into the coupling.. As you can see, I wrapped it up for transport. There is still a lot to do, but all the parts are being painted before mounting. I expect that I will have to go there and do more to finish it. I rewarded myself with an ice cold 🍺.,, and Even My Buddy Mack came to congradulate me.. 🐕 I am greatful for all the help I got on this thread. Too bad I cant give credit to more than one of you for the solution, so I am also Marking fjh as having the solution too. Truly greatful, Jojo now stop bullsh- -ting us !! YOU didn't guess YOU had it right.!!! you knew all along. and I thought school was off for the summer. but then summer school is fun when WE have a great teacher and His assistant Mack Quote Link to comment https://www.bigmacktrucks.com/topic/75886-i-dont-know-how-to-flow-time-my-injpump/page/3/#findComment-581794 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.