2h pinging after injector rebuild

[Buzz]

Myself and a friend have just completed an injector rebuild on a 2h turbo diesel in a 60 series cruiser. It has now developed a pinging sound at higher rpm under load.
The injector pressure pre rebuild we're 1100 psi and have been reset to 2130psi.
Is it possible that the timing will need to be reset now?

Thanks
Buzz

 

[roscoFJ73]

Myself and a friend have just completed an injector rebuild on a 2h turbo diesel in a 60 series cruiser. It has now developed a pinging sound at higher rpm under load.
The injector pressure pre rebuild we're 1100 psi and have been reset to 2130psi.
Is it possible that the timing will need to be reset now?

Thanks
Buzz

I dont think it should need resetting.Normally rebuilt injectors are plug and play. We seen quite few in inexpertly rebuilt injectors come through here lately. I would be asking who ever rebuilt them whats happening.
Have you checked the specs in the FSM?

 

[lostmarbles]

....The injector pressure pre rebuild we're 1100 psi and have been reset to 2130psi.......Buzz

Why 2130psi Buzz?

Aug 1980 2H FSM 36048E:


Nov 1985 2H FSM RM012E:

 

[roscoFJ73]

Why 2130psi Buzz?

I thought 2130 sounded a bit high for a 2H. All the more reason to be banging on the rebuilders door

 

[canucksafari]

I thought 2130 sounded a bit high for a 2H. All the more reason to be banging on the rebuilders door

Yes, that sounded way too high. I have a set that I will be putting in my Nissan that is 30 psi over factory. A bit over factory is suppose to give a bit better atomization and therefore assumed a better combustion. If I recall correctly, too high a breaking pressure will affect the IP timing and perhaps other problems in the IP, especially in a rotary IP .

 

[GLTHFJ60]

Dredging up an old thread as it is the closest match for the issue I think we have. Immediately after reconditioning the set of 2H injectors with new nozzles, we have an audible pinging noise at idle. It does not appear to change with engine temperature (happens when cold or warm). The only thing that changed with the injector assembly is that we used the three hole return washers instead of the two hole washers that came off. The injectors are not leaking at all and the motor seems to run significantly better than before, just now with this pinging noise.

I took a crappy video so y'all could hear the sound I'm describing. Could the different return washers be causing this problem or have we revealed a new issue?



@ontherxs

These are the nozzles that were used:

http://www.ebay.co.uk/itm/TOYOTA-LA...TOR-NOZZLES-SET-OF-6-HJ47-HJ60-/271642758513?

 

[lostmarbles]

Dredging up an old thread as it is the closest match for the issue I think we have. Immediately after reconditioning the set of 2H injectors with new nozzles, we have an audible pinging noise at idle. It does not appear to change with engine temperature (happens when cold or warm). The only thing that changed with the injector assembly is that we used the three hole return washers instead of the two hole washers that came off. The injectors are not leaking at all and the motor seems to run significantly better than before, just now with this pinging noise.

I took a crappy video so y'all could hear the sound I'm describing. Could the different return washers be causing this problem or have we revealed a new issue?
....

I don't hear any problem....

These old diesels don't idle quietly.

Some people describe the idling sound as being like someone hitting a pipe with a hammer .... and not always to a regular beat ....

 

[GLTHFJ60]

I don't hear any problem....

These old diesels don't idle quietly.

Some people describe the idling sound as being like someone hitting a pipe with a hammer .... and not always to a regular beat ....

Well that's good news! That metallic pinging noise is normal?

We thought it was abnormal since we didn't hear it before the nozzle replacement.

 

[hj 60]

me dont have that, listen when the camera is near the injectors for the high frequency sound, its there, and not normal. (1->3 seconds, 8->12 seconds
Maybe when the pump is old the new pressure is a bit much on pump bearings? no clue

 

[roscoFJ73]

Yes , I heard the metallic sound briefly in the original video. Normally when you pay a shop to rebuild and fit them ,they include a pump service and the timing is checked.

 

[lostmarbles]

OK... I hear the "tinkling" you're referring to...

But I still can't say that anything's wrong here... Maybe I'm just ignorant about this

 

[GLTHFJ60]

Yes , I heard the metallic sound briefly in the original video. Normally when you pay a shop to rebuild and fit them ,they include a pump service and the timing is checked.

This is the question. Why would the injection pump timing need to be checked right after an injection service?

I can read up about how to check the IP timing, but what would be included with a "pump service"? Priming pump and filters were replaced when the motor was installed.

 

[handcannon]

This is the question. Why would the injection pump timing need to be checked right after an injection service?

I'm definitely not an expert at this, but I have read that changing/increasing the pop pressure of an injector will change the timing by delaying the injection until the prescribed pressure has been reached.

Don

 

[GLTHFJ60]

I'm definitely not an expert at this, but I have read that changing/increasing the pop pressure of an injector will change the timing by delaying the injection until the prescribed pressure has been reached.

Don

Yes, and I've read that as well. However, the injector spring shims and the springs themselves are the same, just now clean. The only two differences are the brand new nozzles and needles, as well as new 3-hole return line washers.

Would installing new nozzles, but not changing anything else, modify the pop pressure of the injector?

 

[Crick60]

I've changed many 2h injectors and never had them ping from changeover but in saying that I did time the pump after the injectors but I always waited a few weeks.

It's not a massive task to take that extra washer out to rule it out, it could just be enough distance to affect the spray pattern. Otherwise I'd call your new nozzles into question.

 

[GLTHFJ60]

To clarify which washers I'm talking about, I'm talking about the return line washer that's on top of the injector, below the return line banjo. It's installed after the injector is installed in the head.

 

[lostmarbles]

To clarify which washers I'm talking about, I'm talking about the return line washer that's on top of the injector, below the return line banjo. It's installed after the injector is installed in the head.

And whether they are 2-hole or 3-hole couldn't possibly matter IMO.

 

[roscoFJ73]

This is the question. Why would the injection pump timing need to be checked right after an injection service?

I can read up about how to check the IP timing, but what would be included with a "pump service"? Priming pump and filters were replaced when the motor was installed.

When I had mine done they dynoed it and adjusted the fuel while it was on the dyno. They set the idle and and all the other adjustments and put the wire seals on the fuel screws , if you want them.
Told me the HP was 65hp at the rear wheels which is average for a 1HZ with 200000klms. Newish engines get 67-68hp

 

[GLTHFJ60]

When I had mine done they dynoed it and adjusted the fuel while it was on the dyno. They set the idle and and all the other adjustments and put the wire seals on the fuel screws , if you want them.
Told me the HP was 65hp at the rear wheels which is average for a 1HZ with 200000klms. Newish engines get 67-68hp

Got a picture of the wire seals on the fuel screws?

Guess it's time for me to learn to tune the Toyota inline pumps, and of course it's right after I learn to be comfortable the Bosch VE

 

[mongoose2231]

I have rebuilt my injectors as well with new nozzles and the like. I also had the 3 hole return washers. GLTH, I assume you got your nozzles from that vendor in England like I did. My engine doesn't ping at all and it runs and idles great. I did have air in the system and had to reopen and redo the injectors and I reused 2 hole return washers from Cruiserparts. In any instance, my original nozzles and needles were clean and still looked fine. I kept them as spares. My truck however still bellows black smoke. The reason I did the injectors was to get rid of the black smoke. The fuel screw looks as though it has not been tempered with. My last option looks to be timing. I'm just leaving it be for now.