Injectors - replace, renew or just clean?

[PeteE30Tourer]

As regular readers of this forum will know by now, my M20 head is coming off next week to be replaced. Whilst everything is off, i'd like to take the opportunity to do something with the injectors. Question is, what?

Options are:

1. Get the existing ones ultrasonically cleaned - what's the going rate for this to be done? Probably the cheapest option, but i'll still be left with that anoying ticking that drives me up the wall.

2. Renew them with brand new of the same type - megabucks i expect from BMW and they'll probably still tick.

3. Replace them with a different type - there was much discussion about this on the old forum - many went for the E36 M3 ones i think, then it was concluded that these could cause problems. So what's the latest advice on this? Also, where can i get them from and how much?

[Simon13]

Where's Ant when u need his advice?! on holiday!

[E30Adam]

Just get them ultrasonically cleaned Pete.

New ones are over Ԛ£100 each. You'll never get rid of the ticking unfortunately even with brand new injectors. Cleaning will cost you about Ԛ£80 at most places although you will find cheaper.

Remember to replace all the o-rings too.

[jamie325isport]

I thought they were about Ԛ£70 each down my way at the dealer still not the best price in the world, that also maybe + VAT still not great but better. What sort of company does this ultrasonically clean them then, just curious .

[PeteE30Tourer]

New ones are over Ԛ£100 each

F Me! Over Ԛ£600 for the whole set? Stuff that then!

Not sure who i can get locally to clean them - i'll look around on yell.co.uk, but under what category i wonder?

[jamie325isport]

There not that much i went to buy some about three months ago as i thought one of mine was leaking, still not cheap though.

[E30Adam]

There not that much i went to buy some about three months ago as i thought one of mine was leaking, still not cheap though.

From the dealer they are Ԛ£109.74 each - part number 13 64 1 734 776

[jamie325isport]

No way! they must have given me some sort of discount price then? I do know them really well the parts guy is a school friend. Is that an up to date price list youve got Adam? not wanting to start a debate on the subject just wondering.

[E30Adam]

No way! they must have given me some sort of discount price then? I do know them really well the parts guy is a school friend. Is that an up to date price list youve got Adam? not wanting to start a debate on the subject just wondering.

I know someone at my dealership and have the latest prices. That price is for Bosch ones, if you have Lucas ones fitted then I belive these are slightly cheaper. Perhaps he gave you the price for Lucas?

[jamie325isport]

Ah i kind of understand now, all i asked was for a 1991 sport and thats the price he gave me. Either way though its not exactly cheap!

[clackmac325]

what sort of solution do you use in a ultrasonic to clean the injectors then?
Because i may be able to get my hands on one!!
Also any ideas on how long you leave them in?

[Simon]

Deffo get them cleaned Pete, I had the ones in the sport done for Ԛ£35 when they were out, and made quite a difference, you won't ever get the flow rate back upto 100%, but all of the ones I had done were between 92% and 98%, especially noticable when one was only flowing at 38% before cleaning.

GSF sell the bosch injectors too, still expensive, but nowhere near what the dealers charge...Ԛ£40ish each I think.

[Simon13]

it's not so bad when u want 4! but six and it adds up! A bosch dealer of smoe kind should be able to get them done?

[Andy335Touring]

Not sure who i can get locally to clean them - i'll look around on yell.co.uk, but under what category i wonder?

Try looking under car/engine tuning ?

Some info on cleaning injectors on here

http://emeraldm3d.com/em_how.html