New Bosch India 6.5 turbo injectors

[ak diesel driver]

Have to hope

 

[Will L.]

the gauge that comes with the low cost testers almost always suck.
You can replace the gauge with better ones- and if you want get ones that have two needles - one shows live and the other gets pushed to peak and stays there- see pic. Note I am not saying use this brand gauge- just a random example found online quickly.

You can also get a pressure retention valve like a compression tester uses that holds peak until you release it.

You can also get digital gauges that record peak.

Doing it on the cheap- put your phone video recording on slow motion record and test it. Then play back. But realize you need a few cycles and have to learn to pump the handle properly. Like learning to use a feeler gauge- it is not hard but takes a little goofing with it is get the feel.

 

[MrMarty51]

the gauge that comes with the low cost testers almost always suck.
You can replace the gauge with better ones- and if you want get ones that have two needles - one shows live and the other gets pushed to peak and stays there- see pic. Note I am not saying use this brand gauge- just a random example found online quickly.

You can also get a pressure retention valve like a compression tester uses that holds peak until you release it.

You can also get digital gauges that record peak.

Doing it on the cheap- put your phone video recording on slow motion record and test it. Then play back. But realize you need a few cycles and have to learn to pump the handle properly. Like learning to use a feeler gauge- it is not hard but takes a little goofing with it is get the feel.
View attachment 92528

IDK if @dbrannon79 got the threads and size figured out so He could get an adapter to something like pipe thread and a better gauge can then be installed.
I do bieve that He did install a secondary gauge that might be more accurate.

 

[dbrannon79]

I believe the gauge has 3/8" male BSP straight thread. I never was able to get an adapter to go to regular pipe, but ended up using one of the 6.5 injector lines that was cut in half, coupling it together with a hydraulic tube compression fitting Tee that had female pipe thread. used a 3000 psi gauge on the Tee that seems to work much better.

pumping it up with an injector to test, the tester gauge must have some sort of restrictor inside it to make it move slowly. it will hit maybe 1500 PSI when the gauge I added will reach around 2000 psi. you have to have a quick eye to catch the peak pop pressure.

Here is were I show what I have done. but I would say read the entire thread.

6.5 Diesel Injector Rebuild

There was no issues with hard to start or anything else ? If not then that might be the direction that I am headed. They seemed absolutely perfect.

www.thetruckstop.us

 

[Big T]

OK, I got my sets of these injectors and I have an idea of what’s going on. Barcode stickers clearly show Bosch Made in India. They also show a manufacture date of 08/19 and an expiration date of 08/23. I wondering if these were from the production years in which they had quality problems which led to failures?




I put a set from Leroy in my ‘99 about 3 years ago, but did not note the date of manufacture. I ran them about 12K miles until my engine failed due to a worn oil coolant line causing loss of oil pressure. Paveltolz had Bill Heath test those injectors and at least 2 had problematic streams of fuel upon pop testing. The rest were passable. I still put new injectors from Quadstar into the new engine.

Would be interesting to hear what were the problematic years of production and the specific parts that were the problem.

 

[jrsavoie]

OK, I got my sets of these injectors and I have an idea of what’s going on. Barcode stickers clearly show Bosch Made in India. They also show a manufacture date of 08/19 and an expiration date of 08/23. I wondering if these were from the production years in which they had quality problems which led to failures?


View attachment 92588View attachment 92589

I put a set from Leroy in my ‘99 about 3 years ago, but did not note the date of manufacture. I ran them about 12K miles until my engine failed due to a worn oil coolant line causing loss of oil pressure. Paveltolz had Bill Heath test those injectors and at least 2 had problematic streams of fuel upon pop testing. The rest were passable. I still put new injectors from Quadstar into the new engine.

Would be interesting to hear what were the problematic years of production and the specific parts that were the problem.

I wouldn't trust any of them. Test and balance them all.

 

[Big T]

I wouldn't trust any of them. Test and balance them all.

That’s the plan. I’ll correct any problematic ones. Should get at least a good set out of the 16 ordered.

 

[dbrannon79]

It would also be good to know what the problematic ones issue was and if they were correctable. if it was simply the spring or some kind of defect in the nozzles them selves.

 

[dieselolds]

My injector pop tester has arrived.The first tester was damaged in transit and I had to get another one.I will check these injectors either today or tomorrow and see how they turn out.