Injector Repair Kits for Diesel Injectors

Laussiecageman on 20/07/2024 - 11:58
Last edited 20/07/2024 - 12:33 by 1 other user

Hi OzBargainers, first discussion post here as I am curious what the view is of OzBargainers regarding repairing your common rail diesel injectors.

Have you tried repairing your (diesel) injectors yourself?

I noticed that injectors are crazy expensive (up to 800 bucks a pop), but found you could purchase repair kits for around 80 bucks. Given that these kits contain a solenoid and a complete nozzle + pen to actuate the injector, I am wondering whether you have experience refurbishing your own injector to reduce cost?

Looking forward to hearing your thoughts!

Cheers,

A Fellow OzBargainer

Poll Options

  • 1
    Yes, repair kits are my go to!
  • 0
    Yes, I tried but it sucks!
  • 0
    Yes, but only if you know what you're doing.
  • 1
    Yes, not worth it.
  • 1
    Not sure
  • 3
    No, but I am curious to try!
  • 22
    No. Just. No
Automotive Fuel Injector

Comments

  • Drakesy on 20/07/2024 - 12:10
    +3

    Depends how much you value your time and sanity.

    Went down this rabbit hole with my q7 injectors being $800 a pop new. They pretty much said buy new ones as once theyre toast its not really worth putting them back in.

    $4800 later and i proudly no longer own said car.

  • Switchblade88 on 20/07/2024 - 12:15
    +1

    My 2010 Sorento was bleeding too much from one of the injectors. I wasn't keen on spending $4000 on a car with 220,000km on the clock so it got traded in. That $4k saved (plus more for tyres, suspension and everything else) went towards the new car instead.

    Unless you can afford to be without the vehicle for an extended period when you inevitably fail and break the injectors completely, then it's not worth considering a DIY fix.

  • matt-ozb on 20/07/2024 - 12:25

    If it was that easy, it would be a 'common fix'.

    before you waste people's time here, can you provide a summary of your youtube research please?

    • pegaxs on 20/07/2024 - 12:58
      -1

      I’m praying on it being a Scotty Kilmer click bait video or one of the new format Chris Fix ones where he spends 80% of the video talking about all the free sponsor shit he has to shill.

  • MS Paint on 20/07/2024 - 13:09
    +1

    Cleaned up petrol injectors for a 304 no problems using this kit, a can of carb cleaner and a new set of seals. Worked a treat. Total cost was bugger all compared to 8 new injectors.

    • WT on 21/07/2024 - 09:02
      +1

      port injectors are a lot easier to clean, 12v and something to spray through it and youre done. I jerry rigged something to go on the little tube and hot glued it on to fit the top of the injector

    • skillet on 22/07/2024 - 09:00

      Easy if your injectors are still spraying and not broken. The cleaner will restore it's spray pattern. If it's completely shut then it's time for a new one.

      For the super high pressure systems, don't waste your time.

  • lost in transit on 20/07/2024 - 13:20
    +2

    Can be Big trouble when an injector fails in a common rail diesel.

    All this new technology is great until it fails, including ten speed autos 😳

    • mapax on 20/07/2024 - 14:06

      LMFT

      All this new technology is shit especially when it fails, including ten speed autos

      • lost in transit on 21/07/2024 - 11:43

        Thats why I'm hanging onto my 2004 SR5 T/D mate.
        Old tech. It's taken me all over The High Country over 20 years without any issues.

        Plus there's heaps of accessories on it now.

  • brendanm on 20/07/2024 - 14:08
    +3

    Common rail injectors are so precise that they are each individually tested and given a calibration code to put in the ECU to ensure identical fuelling in each cylinder. The tolerances inside are also incredibly fine, any work done on this sort of thing is done in a sterile room.

    The odds of the parts you get being good quality, and you being able to do the job in a meticulously clean environment are already low enough, but even if you do, how do you plan to calibrate them? When your repair fails and fills the cylinder full of diesel and bends a rod, or melts a piston due to poor spray pattern, at least you'll get to replace the injectors with new ones, as well as replacing the engine.

  • racer1234 on 20/07/2024 - 14:34
    +2

    Please make sure you understand the risks involved in doing work on a common rail diesel system. Fluid injection injuries can be lethal.

  • aussiecageman on 20/07/2024 - 14:58
    -3

    Great to read a healthy dose of pessimism!

    I know it's not a common fix, I consulted a mechanic about it. I was just curious what other people's experience has been. Knowledge is power y'all.

    And no, no Scott Kilmer. I just googled the specific injector and saw repair kits come up.

    • brendanm on 20/07/2024 - 18:37
      +2

      I work on diesels daily. I would never do this myself, as the risk is not worth the reward, and I don't have the equipment to test and calibrate.

      • aussiecageman on 20/07/2024 - 18:49

        Someone mentioned refurbishment as an option. Do you reckon that's a good idea?

        • brendanm on 20/07/2024 - 20:12
          +2

          That person is probably referring to older non common rail stuff. Shop around, you should be able to get most injectors around the $500 mark. What vehicle and engine are we dealing with?

          • aussiecageman on 20/07/2024 - 20:17

            @brendanm: C(r)aptiva 2014 cg5 diesel, but can't afford the 2k for 4 new injectors, hence looking at alternative options. One of the four has reached lower learning limit, so it seems to be leaky/worn

            • brendanm on 20/07/2024 - 20:56
              +2

              @aussiecageman: Could also be a mechanical issue with the engine, so I wouldn't go throwing parts at it without a proper diagnosis. If it's definitely an injector, for that vehicle, I wouldn't do any more than fit a good used injector.

              • aussiecageman on 20/07/2024 - 23:55

                @brendanm: Cheers! Got it diagnosed by master mechanic and it's definitely injector. I'll hunt for a refurb injector (set?) and look to get them programmed in

  • jizmo on 20/07/2024 - 15:32
    +1

    Depends on what's wrong with them, if they can be flushed that Fuel Doctor does some pretty amazing stuff. You're meant to add 1 liter to 100L of fuel for every 100K the cars done. If the car's done 200K you need to do this twice, then after that just 1ml per liter.

  • JIMB0 on 20/07/2024 - 15:38

    People used to bang on about how diesel engines were more durable than petrol engines while saving a heap of money on fuel.

    Then when something broke they would spend a fortune on fixing it, only to sell it and buy a petrol car again.

    • Cluster on 20/07/2024 - 16:01

      That was true in the days before high pressure fuel injection. Diesels can still be very reliable and a cheaper form of transport, but if they go wrong, they do wrong in very expensive ways.

  • cohiba30 on 20/07/2024 - 18:03
    +1

    I removed my own injectors, and had them refurbished/calibrated by a professional; reinstalled myself. It was an easy job in my case, and saved a small fortune.

    • aussiecageman on 20/07/2024 - 18:48

      That's a good idea. I'll look into this

    • CurlCurl on 21/07/2024 - 11:12

      I removed my own injectors, and had them refurbished/calibrated by a professional; reinstalled myself. It was an easy job in my case, and saved a small fortune.

      Where they Common Rail?

  • CurlCurl on 21/07/2024 - 11:19
    +2

    That's a good idea. I'll look into this

    You do realise common rail injector pumps run at over 25,000PSI. A leak will only remove your fingers, but also your hand.

    If you have it back together and it leaks you could have run on, and that's, by by Captiva.

    • aussiecageman on 21/07/2024 - 14:32

      Thanks for the info, good points.

      I'm hunting refurbished ones (with codes) and have them installed+programmed by mechanic. If I cant find any, I'll suss out a scrap yard and try to find a good one and have it assessed. There's some measurement places where I live.

  • loadofrubbish on 21/07/2024 - 14:16
    +1

    There are many remanufactured and counterfeit injectors on the market, making it difficult to find genuine ones. Some Toyota dealers may even unknowingly install these remanufactured injectors. Because injectors are precision device, it's worth hiring a professional to ensure the job is done correctly. Diesel injectors typically last about 200,000 kilometers before needing attention. It's a costly service, so consider whether you'll keep the car for the next 200,000 kilometers before proceeding. IMHO

    • aussiecageman on 21/07/2024 - 14:36

      Fair point, I'll see what I can scrounge up. Definitely will consult a mechanic! Planning on driving this thing until it dies

  • 2esc on 21/07/2024 - 18:18
    +1

    There are a few companies that do a change over service just need to google.

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