78 toyota BJ40 injectors (1 Viewer)

[macgyver101]

Hey everyone, Got the diaphram replaced in the injection pump so it is no longer racing however I have what sounds like a diesel knock, mis firing injector. Anyone have a great place to get replacements as I was quoted $280/each so far. Are they rebuildable and where are the parts available. Any and all info would be greatly appreciated. have a great day!! Steven

 

[Dieseler]

Yes injectors are rebuildabe depending were you are located,most diesel shops can test them and rebuild them, I believe the injectors are Denco and the parts are available

 

[lostmarbles]

Hi Steven.

I understand they are shared with H and 2H engines and perhaps with some 3B engines too (probably a 3B as found in a BJ42).

You should have "1800 bodies". (That number should be stamped on them.)

Here it is stamped on one of my original injectors:



(Don't know what the 7s means - I suspect it is a code for a manufacturing date)

And when they recondition them they fit new nozzles (which I believe are Bosch DN 4 SD-24) and they will also adjust the opening pressure (1493 - 1778 psi) and check the spray pattern (4 degree angle).

Here are my replacements I got from Engine Australia:



But Aussi Internet sites like Roodogs should be able to help. (They represent a small/light package so freight is not a big factor.)

Generally they charge you an extra fee that is refundable when you return your original injectors to them.

 

[macgyver101]

Got injectors rebuilt and set timing back to origional marks now it is smoking black instead of blue!!! Looks like there are adjustment screws according to the manual. Any comments or suggestions would be appreciated. Hasanyone had the springs go bad on the front of the injection pump. Inside where there are weights for advancing the pump like a distributor on a carberated vehicle? Thanks again and have a great day!

 

[corglass]

lostmarbles, I'm here again in another thread looking for your expertise.;p

I seems like I'm having injector problems. My BJ40 starts fine, very easily in fact, but then produces copious amounts of white / blue smoke. I even let the truck run for 20 minutes (as it has been 'asleep' for two years) to see if it cleared the issue. No joy, still lots of smoke.

If the issue is with the injectors, it seems like I've a few options:

1. Swap the injector myself with my doner truck to eliminate if it is indeed dodgey injectors
2. Get the existing injectors reconditioned at a specialist shop? $$$ and I loose my truck for a few days. On the plus side, they can also test the pump and see the whole fuel systems as a complete unit.
3. Order new injectors and try those. (the existing injectors are 34 years old...)

I await your never ending wisdom!

Things to note:
- New fuel, oil and air filter installed.
- All fuel line connections are solid, new hoses and jubilee clipped closed.
- New diesel
- Good exhaust connections (exhaust cement used as necessary)
- I've made no timing adjustments (that's not to say the PO didn't )
- Truck starts very easily once heated. Runs very timidly. Needs a high idle to keep going


p.s. I'ver read your comprehensive thread here and here.

 

[lostmarbles]

lostmarbles, I'm here again in another thread looking for your expertise.;p

I seems like I'm having injector problems. My BJ40 starts fine, very easily in fact, but then produces copious amounts of white / blue smoke. I even let the truck run for 20 minutes (as it has been 'asleep' for two years) to see if it cleared the issue. No joy, still lots of smoke.

If the issue is with the injectors, it seems like I've a few options:

1. Swap the injector myself with my doner truck to eliminate if it is indeed dodgey injectors
2. Get the existing injectors reconditioned at a specialist shop? $$$ and I loose my truck for a few days. On the plus side, they can also test the pump and see the whole fuel systems as a complete unit.
3. Order new injectors and try those. (the existing injectors are 34 years old...)

I await your never ending wisdom!

Things to note:
- New fuel, oil and air filter installed.
- All fuel line connections are solid, new hoses and jubilee clipped closed.
- New diesel
- Good exhaust connections (exhaust cement used as necessary)
- I've made no timing adjustments (that's not to say the PO didn't )
- Truck starts very easily once heated. Runs very timidly. Needs a high idle to keep going


p.s. I'ver read your comprehensive thread here and here.

Thanks for the compliments Corglass.

Blue colouring to the smoke suggest some oil-burning.

If it needs a high idle to keep going then this together with the blue smoke brings me towards suggesting a compression check.

(Even though "starting easily" at the same time suggests your compression figures may be OK.)

Compression is always a good basic thing to check to determine the state of an engine.

 

[corglass]

Could it be that my engine is fine and my new (i.e. reconditioned) turbo is the source of the smoke?

Maybe..... this is just an internal thought I'm having as opposed to a question ...

Anyway, back the compression test, I've never done one. Are the injectors easily removed on a B series engine? Are any special tools required? Do I do the compression test with a hot or cold block or both?

I presume I leave the injectors in the three remaining cylinders when doing the test?

 

[lostmarbles]

Could it be that my engine is fine and my new (i.e. reconditioned) turbo is the source of the smoke?

Maybe..... this is just an internal thought I'm having as opposed to a question ...

Anyway, back the compression test, I've never done one. Are the injectors easily removed on a B series engine? Are any special tools required? Do I do the compression test with a hot or cold block or both?

I presume I leave the injectors in the three remaining cylinders when doing the test?

I never thought of the turbo (probably because I don't have one).

Yes. It could be the problem if its seals are leaking oil into your air intake.

No need to remove any injectors for a compression test. Remove the glow plugs instead.

And you're aiming to get 250 rpm engine speed off your starter motor so it needs all the help it can get. So remove all the glow plugs so that only one plug-hole is sealed (and that's sealed by your pressure gauge attachment fitting).

And the aim is to test with your engine warm after it's been for a good run.

You'll need a pressure gauge designed for high-compression diesel engines, a glow plug fitting, and a deep/long-reach 12mm socket (for the glow plugs).

Oh.. And don't forget to have your kill-knob pulled out because you'll blow your gauge if diesel gets injected in there allowing the cylinder to "fire"...

Oh.. And also perform the test with your intake butterfly valve held wide-open.. (which can be accomplished by having someone stick their foot hard down on the accelerator .. or by other means if your alone).

Other stuff I've probably forgotten too ... But I'm sorry I've got to head off to work in a mo.

 

[corglass]

Folks,

Is it possible to just swap injectors between two different B engines without any special tools / skill etc?

The reason I ask is I have a smoky B engine as described above. I have another clean running B engine on my doner truck and wanted to trial swapping the injectors to see if they solved my smoke problem enough to allow me bring it to a diesel specialist.....

Swapping injectors... yay or nay?

 

[FF LC FREAK]

No special tools needed. Just pull them out, put the new ones in, bleed them, and see if it helps. I'm about to do the same thing on my 3B. I've pulled the injectors off my spare 3B and will have them rebuilt. Once rebuilt, I'll put them in. Pretty simple, really.

 

[corglass]

Folks,

I think I found the source of my smoky engine.

I first checked to see if the engine was smoky in my 'pre restoration video' and remembered/discovered that it wasn't! Great start

I then suspected the spoke was due to my turbo modification, so I did some research online. It now appears that the banjo bolt I used on the oil feed line to the turbo has too large of port holes. This is my current theory based on this video on youtube.

The current banjo bolt I have has two 180 degree separated ~2mm holes.
like this.

I plan to plug both of these with weld tomorrow (as I don't have ready access to a suitable replacement) and drill a single 1mm hole for the oil.
like this

I realise the single hole offers no reducency in the event it gets jammed, but I can't continue as is.

I'll update the thread with photos tomorrow.

p.s. I've only got an industrial mig welder to hand, so I hope I don't wreck the fragile 10mm banjo bolt.......

 

[lostmarbles]

Folks,

I think I found the source of my smoky engine.

I first checked to see if the engine was smoky in my 'pre restoration video' and remembered/discovered that it wasn't! Great start

I then suspected the spoke was due to my turbo modification, so I did some research online. It now appears that the banjo bolt I used on the oil feed line to the turbo has too large of port holes. This is my current theory based on this video on youtube.

The current banjo bolt I have has two 180 degree separated ~2mm holes.
like this.

I plan to plug both of these with weld tomorrow (as I don't have ready access to a suitable replacement) and drill a single 1mm hole for the oil.
like this

I realise the single hole offers no reducency in the event it gets jammed, but I can't continue as is.

I'll update the thread with photos tomorrow.

p.s. I've only got an industrial mig welder to hand, so I hope I don't wreck the fragile 10mm banjo bolt.......

Sounds reasonable to me... (Although I'm surprised the larger holes raise the oil pressure inside the turbo enough to blow oil through the seals.)

But then I'm not one of the turbo freaks.

Maybe you should start a new thread on this with a proper heading to attract their interest like "Seeking advice on turbo oil feed" or something like that?



(Without the new separate thread you probably won't hear back from the experts till you've already done your proposed banjo bolt modification. ie Too late..)

PPS. Your diesel sounds just like mine in that video.