3b injector nozzles (1 Viewer)

[bj70cruzer]

So i want to rebuild my injectors for my 3b diesel and i have done abit of research here and have come up with two part number and i am not sure which to order.

DN4SD24ND80

DN4sd24

dn4sdnd135

From what i understand all 3 are interchangeable but i dont underatand the differences.

Could anyone tell me which i should get? I have heard the dn4sdnd135 and 80s flow more than the DN4sd24.

Would it work better with a turbo?

Also i am looking at monark and denso injector nozzles which is better?

Thanks

 

[roscoFJ73]

What year is the engine, is it a rotary pump or inline??

 

[dare]

I replaced the original 80s with dn4sd24s. The pin that sits in the stream on the 80s was slightly smaller so they would flow a little more. I have a photo of this somewhere on the forum.

Honestly despite the terrible pattern on the original injectors I noticed no difference with the new nozzles but the car was off the road for over a month so the memory might have been fuzzy. Fuel economy didn't change.

 

[gerg]

I'd venture your pump is more of a limiting factor to fuel flow than injectors.

 

[stevebradford]

There are at least two different injectors for the 3b. the difference is the spray angle. I believe it changed somewhere around 85. Not sure wich number is which. Either will work But I’m guessing it was an upgrade around the same time they changed to a five bearing cam.

 

[bj70cruzer]

So i looked on toyodiy and it tells me 23620-68010 which is the dn4sdnd135 or a denso part number is 093400-1350
I googled that denso part number and i came across some old stock genuine denso nozzles for 59$aud which is alot chaper then monark at 200$ so i got them.

Although mines a 1985 bj70 its listed for a bj42 but i guess if partnumbers match it should be fine?

Hopefully this helps with fuel economy as right now it does 15l per 100km which i think is alittle excessive even after turning the fuel down abit didnt make much difference.

 

[roscoFJ73]

Hopefully this helps with fuel economy as right now it does 15l per 100km which i think is alittle excessive

Are you getting heaps of black smoke?

 

[bj70cruzer]

Yes at night with cars behind me on acceleration lots of smoke even after turning pump down.

Not sure if injectors or i have to turn the fuel down more

Bought a pop tester aswell so il check old nozzles and post up results

 

[bj70cruzer]

This is the pop tester cost $100 aud

Was going to build one out of a hydraulic jack but by the time i buy the fittings guages and injector line it wouldnt be much cheaper

 

[roscoFJ73]

Good idea. That smoke you see at night is mostly heat shimmer distorting the light from the cars behind

 

[bj70cruzer]

So i have started to rebuild the injectors i have done one so far.

Lapped all the mating surfaces from 80 grit to 1200 grind wet sand.

My old injector spray pattern was all over the place il post a video of one soon and only one injector chattered very slightly.

Also the old ones poped open at 1300psi the manual states 1500 psi

I got slightly thicker shims and its set it at 1750psi pop pressure

Is this too high or is it ok.

Also it has a after market turbo fitted if thats makes a difference to the pressures?

Thanks

 

[bj70cruzer]

So i have started to rebuild the injectors i have done one so far.

Lapped all the mating surfaces from 80 grit to 1200 grind wet sand.

My old injector spray pattern was all over the place il post a video of one soon and only one injector chattered very slightly.

Also the old ones poped open at 1300psi the manual states 1500 psi

I got slightly thicker shims and its set it at 1750psi pop pressure

Is this too high or is it ok.

Also it has a after market turbo fitted if thats makes a difference to the pressures?

Thanks

 

[Diesel Cruiserman]

How did it work out?

 

[MiniPigg]

Im curious to find out as well.