Injectors
01-05-2017, (Subject: Injectors ) 
Post: #39
RE: Injectors
(01-05-2017 )AussieISX Wrote:  Had o go at repairing a leaking injector I had in number six cylinder today . I've had a fuel knock in six for a short time which I believed was a remnant from air cavitation. Last two years I've replaced all six injectors so all are fairly new . Number 4 caused a lot of problems until I realised I had air in the fuel. Did a leak test across both metering accuators to find number six making air . Stripped the injector and found a lot of carbon build up at the tip of the plunger and the tapered seat area where it clearly wasn't seating and sealing combustion gas . I used some carb cleaner and a tiny wad of polishing grade steel wool down the tip of the injector to remove all the carbon. The plunger was easy enough to clean and polish up . I then used aluminium polish and pushed the plunger back into the tip , spinning the plunger in the tip with alloy polish in there to lap the taper . After a very thorough clean of all parts I put it back together. So far so good. With the injector reinstalled the knock has gone and so have the bubbles in a follow up leak test . I believe the cavitation allowed the plunger to bounce off the seat in the tip providing opportunity for carbon to pass . Once anything contaminated the tapered seat it was all down hill . Hopefully it continues to seat and another injector won't be necessary

I find this very interesting. Sounds like some alternative thing to do on older injector that maybe only has this issue and no other problems. Some pics would have been nice. - Maybe something that would eventually be good to make a video of? -- Who knows.


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Messages In This Thread
Injectors - race7820000 - 12-25-2016,
RE: Injectors - rgreen - 12-25-2016,
RE: Injectors - Unilevers - 12-25-2016,
RE: Injectors - Brock - 12-26-2016,
RE: Injectors - kryten - 12-26-2016,
RE: Injectors - race7820000 - 12-25-2016,
RE: Injectors - race7820000 - 12-25-2016,
RE: Injectors - Rawze - 12-26-2016,
RE: Injectors - race7820000 - 12-26-2016,
RE: Injectors - Rawze - 12-27-2016,
RE: Injectors - race7820000 - 12-27-2016,
RE: Injectors - in2trux - 12-27-2016,
RE: Injectors - race7820000 - 12-27-2016,
RE: Injectors - Rawze - 12-27-2016,
RE: Injectors - race7820000 - 12-27-2016,
RE: Injectors - race7820000 - 12-27-2016,
RE: Injectors - race7820000 - 12-27-2016,
RE: Injectors - race7820000 - 12-27-2016,
RE: Injectors - race7820000 - 12-28-2016,
RE: Injectors - Rawze - 12-28-2016,
RE: Injectors - multitask - 07-08-2019,
RE: Injectors - race7820000 - 12-28-2016,
RE: Injectors - race7820000 - 12-28-2016,
RE: Injectors - AussieISX - 12-28-2016,
RE: Injectors - race7820000 - 12-28-2016,
RE: Injectors - Rawze - 12-28-2016,
RE: Injectors - race7820000 - 12-29-2016,
RE: Injectors - Cuya - 12-29-2016,
RE: Injectors - Brock - 12-29-2016,
RE: Injectors - race7820000 - 12-29-2016,
RE: Injectors - Brock - 12-29-2016,
RE: Injectors - Hammerhead - 12-29-2016,
RE: Injectors - race7820000 - 12-29-2016,
RE: Injectors - AussieISX - 12-30-2016,
RE: Injectors - Rawze - 12-29-2016,
RE: Injectors - gearhead - 01-02-2017,
RE: Injectors - Rawze - 01-02-2017,
RE: Injectors - Waterloo - 01-02-2017,
RE: Injectors - AussieISX - 01-05-2017,
RE: Injectors - Rawze - 01-05-2017
RE: Injectors - AussieISX - 01-05-2017,
RE: Injectors - Brock - 01-05-2017,
RE: Injectors - hhow55 - 01-06-2017,
RE: Injectors - dhirocz - 07-08-2019,
RE: Injectors - Rawze - 07-09-2019,
RE: Injectors - Nilao - 01-07-2017,
RE: Injectors - Brock - 01-08-2017,
RE: Injectors - Rawze - 01-08-2017,
RE: Injectors - t700 - 01-08-2017,



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