Injector cleaning | FerrariChat

Injector cleaning

Discussion in '308/328' started by Zenobie, Feb 20, 2025.

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  1. bertrand328

    bertrand328 Formula 3

    Jun 1, 2015
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    Why cleaning @Zenobie ?

    if my memories serve me well you own a 328 and BOSCH 328 injectors could be purchase for about 20/25€ each in Europe easily. IF your injectors are not in good shape I advise you to change them instead and that easy to do.

    I did on my 328 and I found back an engine in great shape since. That was +/- 8 years ago, no need to clean them since
     
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  2. Zenobie

    Zenobie Formula Junior

    Feb 22, 2021
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    Your memory is " parfait" :) Yes 328 - 1986
    Do you or anybody else have by any chance a reference.
    To replace them , simply disconnect the line and carefully pull out the injector? Any tools needed?
    Thanks in advance
     
  3. bertrand328

    bertrand328 Formula 3

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  4. Zenobie

    Zenobie Formula Junior

    Feb 22, 2021
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    By gaskets do you mean the black rubbers? Any reference for these?
    They also sell a tool to remove the injectors = something you screw onto the injector, is this necessary or makes it removal safer/easyer?
    Out of curiosity, what is the broken piece in photo 2?
     
  5. bertrand328

    bertrand328 Formula 3

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    Look at this copy from superformance.co.uk

    As already said if your parts are more or less 35 years old you could find them as show on photo 2 ( part 113309 below )

    I didn't do the job myself but I am sure several here can tell you how to do it

    Image Unavailable, Please Login
     
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  6. Zenobie

    Zenobie Formula Junior

    Feb 22, 2021
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    4 out, the easy ones. 4 to go. So far easy job. Some leveling with 2 open wrenches and the injector pops out
    I also see normal and viton sealing donuts. Which do you recommend?
     
  7. bertrand328

    bertrand328 Formula 3

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    I chose viton sealing ( White parts on my previous photo ) They are supposed to be for life.

    A guy in Netherlands made them. I will send you his email
     
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  8. Zenobie

    Zenobie Formula Junior

    Feb 22, 2021
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    I think you are a bit confused. The white part on the picture is the bushing and in youre case the are made of a mixture polyester threads en Teflon.
    The donut is the black thing sealing ring and in your case that one is rubber but i have seen in some threads here on the forum that some guys all ready used the viton ones, but cant find it anymore.
    MO is that the viton is better resistand to fuel but want to have some confirmation or not before buying them,
    Anybody???
     
  9. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Fuel resistance is not the issue. The viton are better but not life time parts for sure. If you can get them great. If not just get the standard O rings.
     
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  10. Zenobie

    Zenobie Formula Junior

    Feb 22, 2021
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    Had to remove the hood otherwise no way to remove the injectors. Well the new Bosch with Viton rings they are in and no leaks. I did not change the bushings
    Result is very disappointing, I mean no improvement would say rather worse. After the test drive and with the engine off I heard a blub blub sound in the expansion water tank. At the front of the radiator vent a lot of steam came out, from the thermostat vent also but less. However I get the impression that not all the air is out, what am I doing wrong?
     
  11. SeattleM5

    SeattleM5 Formula 3
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    Bosch CIS work has been a hobby of mine for many years and this finding is not entirely uncommon after installing new injectors. The cars that I have worked on that have demonstrated poor performance after replacement with new/cleaned injectors seem to be those that have had adjustments to either the mixture adjustment screw and or the fuel distributor port flows over the years in an attempt to adjust AFR. This is often done, sometimes unknowingly, to compensate for the slow, uneven degradation in fuel injector flows over time. Do you know if any of this was adjusted on your 328 in the past? I would start with checking the AFR, ideally from each of the cylinders using the individual exhaust gas sampling ports if they are still in place.
     
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  12. Zenobie

    Zenobie Formula Junior

    Feb 22, 2021
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    I presume that AFR means air fuel ratio?
    Once i have the new spark plugs in place i go to a Bosch agency to adjust the fuel mixture. As even before changing the injectors and plugs and at a moment the car was running perfect several people told me that when they drove behind me it really smelled gasoline
     
  13. SeattleM5

    SeattleM5 Formula 3
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    Yes, sorry. AFR = air fuel ratio
     
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  14. st@ven

    st@ven F1 Rookie

    Aug 4, 2008
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    Show me where you can buy these for 20/25 Euro.
    And please make a conscious decision on using brass replacements or go with steel ones. I never use the brass ones as im always afraid the will snap when pulled out later.
     
  15. Zenobie

    Zenobie Formula Junior

    Feb 22, 2021
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    The 1 ste line are the injectors, the second line are the viton rings, those prices are without btw = tax
    Autodoc is European cy
     

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  16. Rifledriver

    Rifledriver Three Time F1 World Champ

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    Now we are in serious fantasy land. Your tin foil hat is loose.
     
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  17. mike996

    mike996 F1 Veteran

    Jun 14, 2008
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    FWIW, I replaced the OEM steel injectors on my '89 328 with a set of new Bosch brass injectors. The car was running perfectly with the original injectors but I replaced them because the old ones were "old." :rolleyes: There was absolutely no difference in the way the car ran before/after. I'd suggest that unless there are symptoms indicating an injector(s) is faulty, leave them alone.

    Post #12 mentions removal of the hood. I didn't have any particular trouble removing/installing the injectors with the hood in place. I don't recall it being much more involved than changing spark plugs. I had the injector removal tool sold by someone on this site - can't remember who since it was probably 10 years ago. :oops:
     
  18. Zenobie

    Zenobie Formula Junior

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    It may be possible without removing the hood, but it is certainly a lot easier with the hood off
     
  19. Rifledriver

    Rifledriver Three Time F1 World Champ

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    I never do it with hood in place. Takes 5 minutes to R+R hood.
     
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  20. LostAussie

    LostAussie Formula Junior

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  21. bertrand328

    bertrand328 Formula 3

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    In many parts dealer which supply BOSCH parts everywhere in Europe or through numerous websites selling car parts.
     
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  22. st@ven

    st@ven F1 Rookie

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  23. SeattleM5

    SeattleM5 Formula 3
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    Curious where you can still by steel injectors new? They have been out of production from Bosch since 2011. I am preferential to the steel versions for a couple of reasons that have been discussed/debated on this site before. The only way to get steel versions that I am aware of is by rehabbing used injectors.
     
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