New Injectors

[CUMMINSDIESELPWR]

Well, i finally got around to installing the new RV275's. I will say i had many things that were going downhill with the original stockers as so many things changed after the replacement.Things i noticed after install.Engine is MUCH quieter!No more injector knock on a few cylindersEGT's are better (when foot isnt pushing a hole in the floor)A bit more power (nice to have)Turbo can now reach the defuel setting i have #29psistartup is same no issues thereshutdown is smoother!MPG (that i have calculated to be precise) 20-23mpg @ 65mph!!! (real time lie meter reading)Fuel pressure not jumping around from 14-19 cruising with old injectors, now is stable @17 when cruising with new injectors.so far no leaks!!These are genuine bosch NEW RV275's. I am very pleased with them. :thumbup2::thumbup2:

[Te300]

Were they hard to put in? Any special tools? I have a set coming and intend to do them myself. I just did my own vp and fass one fifty. Are they as easy as that? I should adjust or check the valves while I'm In there too. Right?

[CUMMINSDIESELPWR]

Were they hard to put in? Any special tools? I have a set coming and intend to do them myself. I just did my own vp and fass one fifty. Are they as easy as that? I should adjust or check the valves while I'm In there too. Right?

you will need a inch lb torque wrench. http://www.sears.com/mountain-tools-3-8inch-drive-20-200-in-lbs-torque/p-SP101A12213S3876739001P?prdNo=7&blockNo=7&blockType=G7 take intake horn/grid heater off take injector lines off pop the injector tubes out leave them hanging bout an inch outside the head take valve cover off, contrary to popular belief you can remove the valve cover without having to scoot it over the heater hoses by popping the cover bolts off and out of the cover, all 5. lift it right off over the rockers. (done this many times no issues plenty of room above the cover) one at a time, take the hold down bolt out and plate off the injector thread a valve cover bolt into the injector leverage it out with a big screwdriver (not much force really) ensure copper washer comes out with it put new injector in the same way, thread valve cover bolt and push it in (takes some force with hand) align it properly put hold down plate on and bolt in finger tight, pop injector tube back into its slot repeat x5 put injector lines back on and torque them down torque the injector hold down plate bolts to 89inch lb use inch lb torque wrench replace valve cover button everything back together crack injector line 1,3,4 cycle fuel pump twice with engine bump then crank 10 seconds look for fuel out of the lines tighten the ones down that have fuel coming out then crank again, should start and you are done. took me about 1.5 hours taking my time. Priming and getting the engine running again literally took about 5 minutes or less from initial crank for prime. small flathead screwdriver to pop out injector tubes sockets and ratchet metric big screwdriver to pry out injectors in/lb torque wrench 19mm combo wrench or 19mm crows foot for injector lines here is the mopar man link for vids, i watched them and i had no questions. You should watch as well so you know what to expect. changing out the vp is harder in my book. http://articles.mopar1973man.com/2nd-generation-24v-dodge-cummins/25-fuel-system/255-24v-injector-install-video

[98whitelightnin]

Did you get them from Jacob at DAP? Looking into getting my grandpa a set from them but there are 2 to choose from, house brand and bosch. I have dont probably a dozen sets of injectors and I dont take the lines off, just take the five 8mm bolts out that hold the lines to the intake.

[CUMMINSDIESELPWR]

after consideration and limited funds i did go with DAP NEW genuine bosch RV275's they had 5 sets and when i emailed them they had 3 claimed so after me there might not be any left and they dont get them in frequently. im gonna sendthe cores in today to get my core refund which will set me at $269~ on the set.

[Mopar1973Man]

As for the overhead computer it no longer calibrated... Even my ScanGauge II is different from stock to RV275's...True Stock - 9.6% OffsetStock / Edge Comp - 18.2% OffsetRV275 / Edge Comp - 22.5% OffsetDouble check again...

[CUMMINSDIESELPWR]

ill do hand calculated when i fill up.

[JOHNFAK]

Did you get them from Jacob at DAP? Looking into getting my grandpa a set from them but there are 2 to choose from, house brand and bosch.

Go with some of his house 50-90 hp Don't see issue with using old core bodies as all are pop tested and flow balanced and think vco injectors typically fail in the nozzle itself not the body and only way to alleviate that is go sac

[98whitelightnin]

Looks like 3 to choose from, DAP, bosch and another that are like $200. Not sure what he wants to do yet or when im going back to Tx, should have had a set waiting for him when he got here last week.:banghead:

[ebbtide357]

waiting patiently for my shipment from dap also went with bosch rv275s by the way is there a need to change the orings on the feed tubes? he said he would throw some o rings in. also you did not remove all the injector lines and pull all the tubes out?

[98whitelightnin]

Its good practice to change them if they have never been changed since you have the system open anyway. Atleast pull the tubes and look at them real close for nicks. I have yet to pull the lines in over a dozen injector changes.

[CUMMINSDIESELPWR]

waiting patiently for my shipment from dap also went with bosch rv275s by the way is there a need to change the orings on the feed tubes? he said he would throw some o rings in. also you did not remove all the injector lines and pull all the tubes out?

i had the injector tubes out about 4 months ago to replace the orings so mine were already good to go. i did pull the lines totally off as i dont like to "bend them out of the way". i still inspected the injector tubes for any defects. If you are getting orings with the injectors you are best to change them out as if they are stock and you disturb them they will start to pee on ya. Clean the injector tubes and put the orings on DRY ( i did them dry and still have no leaks) I have recently found a leak on the backside of the block, i will have to crawl under to find where its coming from, might be the banjo on the back of the head came loose. its a small weep but it has a drip to it and will clean it up. the lines to the injector tubes are clean and dry so its not there.