Replacing just injector nozzles???

[millsroger]

Friend right down the street has a 95 EX cab 6.5 F Turbo truck. He, and I, would like to know the success rate of just installing new nozzles on an existing set of injectors on a DIY basis.

 

[Pruittx2]

100%,, IF, after your done, swapping out tips,,you have the pop pressure's set to 2200psi. For this you either build your own pop tester,, or take them to a local diesel shop, and have them do it. The springs inside are sure to be worn some,, and weakened over time, so they will add a few shim's to get all 8 dialed into a 25psi +or- your goal, for a smooth even balanced fuel delivery.

 

[millsroger]

Thanks Pruit, kinda what I told him, I think he is being cheap--I had mine rebuilt with new nozzles and balanced. I wanted to hear from someone else.

 

[Pruittx2]

I'm sure he could,, but how would it run?,,, or last?,,, Tell you tightwad friend,, if it's worth doing,, it's worth doing right!

 

[3500GMC]

There is a guy around here that built a pop tester from an old bottle jack. :hello:ut:

 

[JiFaire]

It doesn't look hard to do - I've not done it, but I know how it's done - however, I wouldn't do it myself as a rookie, without a safety net (ie: supervisor (aka Turbine Doc) to do quality control while I worked).

Injectors are one of the few things that can take out your engine if you screw 'em up... just sayin'

 

[Drago]

6.5 injectors cost what? 50-80 a piece maybe as opposed to 500-600 apiece for duramax injectors. my plan is to buy one or two a month and take a long week end to do glo plugs, injectors and whatever else the beast needs.

 

[Suburbank2500]

There is a guy around here that built a pop tester from an old bottle jack. :hello:ut:

Here is mine pop tester.

I used a a2 ton hydr. jack.
Make sure you have a passage in the piston and bottom so the fuel can flow to the top, you may have to center drill the piston.
Welded the piston to the outer housing, welded a thread piece on the top and fitted a T piece fot the manometer, and connection for the injector.
Silver solded a cone on the end of the pipe that fits to the injector(place the nut for the injector on the pipe first).
Ther was a rubberplug in the side of the jack, made threads and fitted a 90 degrees fitting, and connected it to a bottle to store the fuel in.

Done

 

[Drago]

Here is mine pop tester.

I used a a2 ton hydr. jack.
Make sure you have a passage in the piston and bottom so the fuel can flow to the top, you may have to center drill the piston.
Welded the piston to the outer housing, welded a thread piece on the top and fitted a T piece fot the manometer, and connection for the injector.
Silver solded a cone on the end of the pipe that fits to the injector(place the nut for the injector on the pipe first).
Ther was a rubberplug in the side of the jack, made threads and fitted a 90 degrees fitting, and connected it to a bottle to store the fuel in.

Done

how does it work?

 

[Suburbank2500]

Install the injector at the end of the tube

pump up the pressure like it was a regular jack, watch the manometer when it pops
note the value.

for leakage test you pump it close to the pop value and hold it for a while to chech for leakage at the tip, and return

 

[3500GMC]

Lol we think alike!

 

[Suburbank2500]

Looking nice 3500GMC Do you have a one way valve on it to hold the pressure, been thinking of that.
Makes it easier to read the value.

Is it projects on the shop floor ?

 

[3500GMC]

No valve for the first trial run. Now that I have time to tinker, yeah I'll get a valve before the next set or squirts. I see you went with a liquid filled dial. That helps.

The complete engine on the floor was/is the original '93 212k 6.5 with spun 1&2 rod bearings.

Block and other stuff was the beginning of the '82 6.2 build. Now 11k later still chugging along great.

I built the pop tester just before the 6.2 build.

 

[Suburbank2500]

Nice to have something to do
Its great fun to create testing tools self, it becomes a on off and cheap to..