terry Posted Monday at 09:18 PM Share Posted Monday at 09:18 PM 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 Monday at 09:36 PM Author Share Posted Monday at 09:36 PM 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 yesterday at 12:53 AM Share Posted yesterday at 12:53 AM 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 yesterday at 01:01 AM Share Posted yesterday at 01:01 AM 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 yesterday at 03:30 AM Share Posted yesterday at 03:30 AM 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 18 hours ago Popular Post Share Posted 18 hours ago 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 16 hours ago Share Posted 16 hours ago 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 10 hours ago Author Share Posted 10 hours ago 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 9 hours ago Share Posted 9 hours ago 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 9 hours ago Author Share Posted 9 hours ago 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 9 hours ago Share Posted 9 hours ago 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 9 hours ago Author Share Posted 9 hours ago 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 8 hours ago Share Posted 8 hours ago 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 8 hours ago Author Share Posted 8 hours ago 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 8 hours ago Share Posted 8 hours ago 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. 1 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...
fjh Posted 5 hours ago Share Posted 5 hours ago 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!👍 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...
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