Injector upgrade or refurbish?

[twenty]

Hi,

Given my car has circa 158k miles on the clock and I don't have any record of any injector work done, I was thinking of getting the originals, part no. 0280150715, refurbished.
I also did some research around a replacement (as technology would've moved up a bit in the last 30 years) and seem that a newer 4 pintle Bosch injector, part no. 0280155771, is readily available too.

Is anyone using the latter? Was there any tangible difference?
Also noticed that the newer design one is 3mm shorter overall compared to the old one. Will this be a problem?

Thanks.

[steve_k]

i'm not using the "new" design one's as i use green top 17lb/hr (four pintle) from an m50b25 in my 2.7 m20 stroker.

now some will tell you that the four pintle one's will cause bore wash whicj is frankly bollox, ive had then in a good few yeras & when i took the head off the other year there were absolutely no signs of bore wash.

your best bet is to get the originals rebuilt & flow tested, injertune (sp?) on here (i think they still are) will be able to do them for you.

[twenty]

i'm not using the "new" design one's as i use green top 17lb/hr (four pintle) from an m50b25 in my 2.7 m20 stroker.

now some will tell you that the four pintle one's will cause bore wash whicj is frankly bollox, ive had then in a good few yeras & when i took the head off the other year there were absolutely no signs of bore wash.

your best bet is to get the originals rebuilt & flow tested, injertune (sp?) on here (i think they still are) will be able to do them for you.

Thanks. I'll go the refurb route for now.

[Satan]

https://www.injectortune.co.uk

[HJ1981]

I went through 3 sets of OE Bosch injectors, i guess some cleaning services are just too aggressive compared to others, 3 were leaking from the originals. Picked up a set of 6 used ones, had those cleaned, found another 3 leaking ones. A couple of months later, suffered from hard starting, rough running etc. Found two injectors leaking, swapped those for used ones....you get the idea. Either i was unlucky or the cleaning service i took them to were aggressive.

Replaced them with Bosch 0 280 156 346 (the only replacement we have in Germany) and they fit just fine, but car ran rough.

After checking RealOEM and my dealership, it seemed that the Lucas/Siemens D3762FA were fitted to my specific 325i for some reason. Picked up a refreshed set and the car runs so much better with those, even fuel economy has increased by 80-100 kms range (for some reason), despite the specs on those to flow 180cc/min (the OE Bosch ones are 166cc/min) and a completely different spray pattern and nozzle.

[paultv]

Me too - I have two sets both cleaned by Injectortune, and even though I have mixed them to find the best combination, I still have one or two that leak a little, causing hot start issues sometimes.

I also have a new set of Bosch 0 280 156 346 which I'm interested to test as they are listed as an oem replacement for my 325i

Are these your injectors??

https://www.ebay.de/itm/OEM-Lucas-Benzi ... 2911971797

Paul

[twenty]

Interesting. I don’t seem to have any hot start/idling issues since Barry@BMR fixed it.

Maybe I should take the injectors out and see what the model is. My understanding is that for 325i they should be what I posted above.

According to BMWFans, mine are either 13641731357 (Lucas) or 13641734776 (Bosch).

[paultv]

My opinion would be if the car runs fine and returns acceptible mpg, the whole thing is best left alone. Changing things that work can simply open a huge can of worms.

My car is fine, good economy, drives like the wind - never misses - but can have a hot start issue which I want to sort out. Biggest reason is that a leaky injector dribbles neat fuel into the manifold which can get into the bores through open valves as the car stands and this can cause bore wash, so I want to fix it if I can, as I drive lunatic distances in my cabby.

Paul

[twenty]

I get 13MPG but then again I drive inside more or less central London on short trips infrequently.

[paultv]

Yeah its true, pottering around London at 5 mph isn't good - I thnik I got 38 on my last long drive to southern Italy - but that's perfect conditions for a good mpg.

Paul

[HJ1981]

Me too - I have two sets both cleaned by Injectortune, and even though I have mixed them to find the best combination, I still have one or two that leak a little, causing hot start issues sometimes.

I also have a new set of Bosch 0 280 156 346 which I'm interested to test as they are listed as an oem replacement for my 325i

Are these your injectors??

https://www.ebay.de/itm/OEM-Lucas-Benzi ... 2911971797

Paul

Paul those are what i have right now installed, but i got them for €121 incl. shipping. The only difference from the link you sent vs the ones i picked up is the colour, mine is black (no big deal).

BMW recommends completely replacing (not cleaning) the injectors every 100,000 kms and they cost €131 each directly from the dealership, one can see why cleaning is a much cheaper and practical option.

[reggid]

i would get new ones. Alot of the used stuff is getting on these days. Heard many refurbed ones getting stuck open, or not functioning and causing all sorts of issues which used to be rare 10 years ago. i mean they have like moving parts inside so are not going to last forever no many how many times you clean them

[flybynite]

i would get new ones. Alot of the used stuff is getting on these days. Heard many refurbed ones getting stuck open, or not functioning and causing all sorts of issues which used to be rare 10 years ago. i mean they have like moving parts inside so are not going to last forever no many how many times you clean them

Have you any experience of using the new 'plastic' injectors like these?

injector.jpg

I am just trying to work out if it is a new modern and improved design using materials and processes not available in the 80s or a new cheap design to save cost with no concern to longevity.

[paultv]

You need this!!


https://www.ebay-kleinanzeigen.de/s-anz ... pp_android

[paultv]

I have a new set of those cheap plastic injectors...might fit them today...see if they work properly or not.

Paul

[HJ1981]

Had those installed, fit just fine as the bigger, fatter OE 30 year old Bosch ones.

They are made in China, as with 90% of all German brands now, they come in a sealed Bosch package (similar to when one purchases new spark plugs but sealed). One injector was missing a plastic clip, got 50% refunded to me from the supplier.

I saw no real change in economy or running issues with those installed vs the older style ones. But as i said, if anyone is concerned about fitment issues, they fit in just fine. They flow rate is lower i believe, and spray pattern is different.

[flybynite]

You need this!!

If I had that I would probably do more damage to myself than the injectors

They flow rate is lower i believe, and spray pattern is different.

This engine will be a 2.7 Alpina-style. Standard flow should be fine but I don’t want any less.

In his last video Stevie has some M50 ones fitted but they looked single pintle cant work it out.

Do they really work better in a standard M20B25?

[reggid]

i would get new ones. Alot of the used stuff is getting on these days. Heard many refurbed ones getting stuck open, or not functioning and causing all sorts of issues which used to be rare 10 years ago. i mean they have like moving parts inside so are not going to last forever no many how many times you clean them

Have you any experience of using the new 'plastic' injectors like these?


injector.jpg


I am just trying to work out if it is a new modern and improved design using materials and processes not available in the 80s or a new cheap design to save cost with no concern to longevity.

yes been using them for ages, its preferred

[paultv]

Well the sun is out so I decided to fit the plastic injectors...out with the old ones...

20201031_132028.jpg

20201031_132010.jpg

Took it for a top down thrash...loads smoother tickover and smoother take up especially in higher gears..

I paid 35 euros apiece for them.

Paul

[flybynite]

That will be a win then!

Like the Denim Cam cover, does it polish up well?

[paultv]

and I'm gonna sell the 12 I have - both sets went to Injectortune in the last 2 years - but I don't suggest anyone on here buys them !!

The car ate another pintle cap - bad design that they can fall into the intake manifold so easliy - then get sucked into the cylinder after being
crushed by the valve.

Paul

[twenty]

Well the sun is out so I decided to fit the plastic injectors...out with the old ones...



20201031_132028.jpg

20201031_132010.jpg


Took it for a top down thrash...loads smoother tickover and smoother take up especially in higher gears..

I paid 35 euros apiece for them.

Paul

The plastic ones should be a lot cheaper.
See https://www.aliexpress.com/item/32963428658.html and https://www.aliexpress.com/item/32961105589.html

[paultv]

yes but plus delivery and I've been nailed for import duties with Aliexpress before - so it's abit of a lottery...

Paul

[twenty]

yes but plus delivery and I've been nailed for import duties with Aliexpress before - so it's abit of a lottery...

Paul

You could’ve bought new genuine ones for that price. See https://www.ebay.co.uk/itm/133436227883

[flybynite]

The plastic ones should be a lot cheaper.
See https://www.aliexpress.com/item/32963428658.html and https://www.aliexpress.com/item/32961105589.html

We are not talking about cheap fake ones we are talking about the new genuine Bosch plastic design ones.

[HJ1981]

Very nice price Paul, best price i found now w/o shipping in Germany is €28,75 but €35 is still damn good.

[twenty]

The plastic ones should be a lot cheaper.
See https://www.aliexpress.com/item/32963428658.html and https://www.aliexpress.com/item/32961105589.html

We are not talking about cheap fake ones we are talking about the new genuine Bosch plastic design ones.

Fair enough. But see my post above about getting the genuine metal ones for a little bit more.

[BristolE30]

My opinion would be if the car runs fine and returns acceptible mpg, the whole thing is best left alone. Changing things that work can simply open a huge can of worms.

My car is fine, good economy, drives like the wind - never misses - but can have a hot start issue which I want to sort out. Biggest reason is that a leaky injector dribbles neat fuel into the manifold which can get into the bores through open valves as the car stands and this can cause bore wash, so I want to fix it if I can, as I drive lunatic distances in my cabby.

Paul

Mine does the exact same thing but I’ve got x6 brand new injectors. So I’m not sure it’s injector dribble...

[flybynite]

Fair enough. But see my post above about getting the genuine metal ones for a little bit more.

I saw that but it is not really the question. On quite a few engines the new design (I posted above) is the official direct replacement for many of the old metal injectors.

One of the people I trust to know if they are better said:

yes been using them for ages, its preferred

The old metal had issues

The car ate another pintle cap - bad design that they can fall into the intake manifold so easliy - then get sucked into the cylinder after beingcrushed by the valve.

I have had this too

[flybynite]

Mine does the exact same thing but I’ve got x6 brand new injectors. So I’m not sure it’s injector dribble...

What injectors did you use

[BristolE30]

Mine does the exact same thing but I’ve got x6 brand new injectors. So I’m not sure it’s injector dribble...

What injectors did you use

Just the superseded Bosch ones. Got the part number from realOEM. Can’t remember it now. It was the new thinner plastic Bosch ones though