Wrong injector nozzle 2H-engine

[Luke77]

In my last revision of my injectors I accidentally placed 2 wrong injector nozzles in my injectors. The other 4 out of 6 nozzles stayed the same, because they were OK.

I replaced them with 23620-54010 in stead of 23620-68020. Can this cause any problems or will it only cause some more diesel in the fuel mix?

 

[lostmarbles]

In my last revision of my injectors I accidentally placed 2 wrong injector nozzles in my injectors. The other 4 out of 6 nozzles stayed the same, because they were OK.

I replaced them with 23620-54010 in stead of 23620-68020. Can this cause any problems or will it only cause some more diesel in the fuel mix?

From what I can find out:

• From Aug 1980 to Oct 1982 a 2H in an HJ60 takes 54010.
• From Oct 1982 to Nov 1984 a 2H in an HJ60 takes 68010
• From Nov 1984 to Aug 1987 a 2H in an HJ60 takes 68020

So from this it appears that your 2H engine in your 1982 HJ60 shouldn't run 68020 at all (and depending on your build month, 54010 may indeed be correct).

As to what effect this mis-matching will have ... I can only guess at:

• rough idle, and
• lowered fuel economy

It is essential (in my opinion) to always replace such things "as a set".

(If you need to replace a wearable component on one nozzle - then you must replace all 6.)




PS. Sorry this isn't very helpful. But I strongly dissaprove of "replacing nozzles on an individual basis" and I wouldn't know how to find out now what (if any) differences there are between the nozzles you now have fitted.

 

[bj40green]

Hi Tom,

Hmmmm, his sig line doesn't say which month his truck is.
From your research I read that in the first 9 months of '82 54010 is the correct part and 68010 is correct for the last 3 months.

Rudi

 

[lostmarbles]

Hi Tom,

Hmmmm, his sig line doesn't say which month his truck is.
From your research I read that in the first 9 months of '82 54010 is the correct part and 68010 is correct for the last 3 months.

Rudi

Yeah. So I'm puzzled why he found 68020 in there because that doesn't fit with "1982 HJ60" at all Rudi.




Edit (Actually this post has undergone multiple edits now and I'm getting a headache because of it LOL):

Anyhow.... the OP (Luke?) is unlikely to know what nozzles he had in place unless he saw see a decipherable part number stamped on them .. which I think is unlikely.

So now .....using my now-notorious CSI skills ... I put it to you (the jury) that Luke made a typo and really meant to say that he replaced two of his six 54010 nozzles with 68020 nozzles.

This would make more sense to me because if 68020 superseded 68010 which in turn had already superseded 54010 - then Toyota wouldn't bother stocking the superseded nozzles (provided they're interchangeable).

And Luke probably got the number 68020 from the Toyota salesperson who sold him the new parts and got the number 54010 off the EPC (which is what's listed there for a pre-Oct 82 HJ60).

But all the numbers are an irrelevance anyway because ... having an engine with 2 brand-new nozzles coupled with 4 old ones represents "mismatching" even if all six nozzles were to have had the same part numbers.

... I rest my case ... (and resort to a few swigs of alcohol to regain composure)...

 

[roscoFJ73]

PS. Sorry this isn't very helpful. But I strongly dissaprove of "replacing nozzles on an individual basis" and I wouldn't know how to find out now what (if any) differences there are between the nozzles you now have fitted.

I agree in the strongest possible terms.

 

[Luke77]

The problem started, because I found out I had a engine swap in my car. The chassis is from 1982, but the engine is from approx march 1986. That's is exactly why I replaced it with the 1982 nozzle in stead of the 1986.

What I get is, that I will replace them again with the right 1986 nozzle.

But I see a few replies telling me to change all the nozzles in stead of only two.
I had them serviced them by a centre specialized in injectors and only two out of six were damaged (I brought them the wrong replacement parts ). Why should I change all six then? The injector nozzles are not for free... €6,- for a check per nozzle, €40,- for a new nozzle and €60,- if they have to be replaced by the specialist.

 

[lostmarbles]

The problem started, because I found out I had a engine swap in my car. The chassis is from 1982, but the engine is from approx march 1986. That's is exactly why I replaced it with the 1982 nozzle in stead of the 1986.

What I get is, that I will replace them again with the right 1986 nozzle.

But I see a few replies telling me to change all the nozzles in stead of only two.
I had them serviced them by a centre specialized in injectors and only two out of six were damaged (I brought them the wrong replacement parts ). Why should I change all six then? The injector nozzles are not for free... €6,- for a check per nozzle, €40,- for a new nozzle and €60,- if they have to be replaced by the specialist.

Hi Luke.

OK I see the situation better now. (Sorry for my stupid guesswork.)

Yes. I think the proper fix would now be to replace all six nozzles with new ones bearing part number 23620-68020.

But it's completely up to you whether you do so or not.

I can understand your reluctance because of the cost. But if a job is worth doing, then it's worth doing properly (as they say).

Think about this ....
Not many mechanics replace spark plugs in petrol engines individually. Similarly not many replace glow plugs in diesel engines individually. This is because because most people value an engine's ability to start and run smoothly (and any differences between these plugs will inhibit this).

Injector nozzles are even more important to keep identical because any unevenness in fuel delivery will unbalance cylinder work-loads throughout your engine's operating range.



PS. If your specialist was happy with changing just 2 of the 6 nozzles then I'd look for another specialist. (I think they should have at least TRIED to persuade you otherwise.)

 

[Luke77]

Hi Lostmarbles,

I see your point, but if I look in the manual, you get a chapter "Disassembly, cleaning and test of injection nozzle" (page FU-6).

There you can find (see picture): If the needle does not sink freely, replace the nozzle assembly. To me this does suggest that replacement is not necessary if it is functioning OK. Otherwise it should state: replace all injection nozzles/assemblies or something like that.

The same on the page FU-5 "Leakage test" and "Spray pattern test".



Luke77

 

[lostmarbles]

Hi Lostmarbles,

I see your point, but if I look in the manual, you get a chapter "Disassembly, cleaning and test of injection nozzle" (page FU-6).

There you can find (see picture): If the needle does not sink freely, replace the nozzle assembly. To me this does suggest that replacement is not necessary if it is functioning OK. Otherwise it should state: replace all injection nozzles/assemblies or something like that.

The same on the page FU-5 "Leakage test" and "Spray pattern test".



Luke77

And other Toyota engine FSMs I've looked at just now are similar to what you've shown here Luke.

I can't explain this other than to think it's an oversight by the Toyota technicians who write/assemble the FSMs.

I think they should have made it clear in all their engine FSMs to replace them as a set rather than individually.

Let's just wait and see what others have to say.



(I'm sure there will be some people who agree with you that it's OK to replace nozzles individually but I'm proud to stand with Rosco against doing so.)

 

[Luke77]

I'm sure there will be some people who agree with you that it's OK to replace nozzles individually but I'm proud to stand with Rosco against doing so.

I have put this question in a new thread so we get more opinions:

https://forum.ih8mud.com/diesel-tec...le-assembly-set-individually.html#post7765964

 

[Luke77]

Replaced them all today and is running very smoothly again!

 

[ozwallaby]

Replaced them all today and is running very smoothly again!

Ahh yes, the placebo effect......

 

[FloHJ60]

Hello, I'm bringing this thread back from it's slumber, apologies. I'm having a similar dilemma about which injectors I should be installing in my 2H.

It's between 23620-68010 & 23620-54010

I'm having real difficulty in identifying when my HJ60 was built, I've tried numerous times, all futile.

My VIN number is JT1W0HJ6000952803
It's a 4 speed manual, 77kw, Europe edition, back door opens vertically (not barn doors). On my car papers it says 1983, however this is the date when it was first registered not built.
I've entered my VIN into partsouq & amayama and somehow both injector part numbers pop up.

There seems to be a number stamped on my block which is 68010. Not sure if it is corresponding, could be! I've attached the cars ID plaque and block stamp and injector body. Your help would be greatly appreciated! Cheers