Injector cleaning
Discussion
With holiday break time finally here, I'm considering removing the injectors on my 4.0 to get them cleaned.
More one than one garage has asked me if I've had them done, and I doubt in their 84k miles that they ever have been. Now, I know many will say just change them for new ones but first things first. A search hasn't revealed if it is as simple as I hope.
The plenum has to come off obviously, but is access then possible without removing the base plate?
Any residual pressure is released by pressing the valve on the fuel rail that I can see. Is it then a matter of just pulling them out?
Many firms advertise ultrasonic cleaning on ebay, and Aldon Automotive are just 1 mile up the road but they are on the pricey side I feel. I'm in no rush. Having said that, no salt down on the roads in the Midlands... yet!
More one than one garage has asked me if I've had them done, and I doubt in their 84k miles that they ever have been. Now, I know many will say just change them for new ones but first things first. A search hasn't revealed if it is as simple as I hope.
The plenum has to come off obviously, but is access then possible without removing the base plate?
Any residual pressure is released by pressing the valve on the fuel rail that I can see. Is it then a matter of just pulling them out?
Many firms advertise ultrasonic cleaning on ebay, and Aldon Automotive are just 1 mile up the road but they are on the pricey side I feel. I'm in no rush. Having said that, no salt down on the roads in the Midlands... yet!
Real easy job.
Wiggle off the fuel rail and gently pull out the injectors, they are located with O rings only around both ends of their body so easy.
Use a little Vasaline around the O rings.
When relocating pull the injectors up into the fuel rail to locate the clips in the injector body.
Wiggle off the fuel rail and gently pull out the injectors, they are located with O rings only around both ends of their body so easy.
Use a little Vasaline around the O rings.
When relocating pull the injectors up into the fuel rail to locate the clips in the injector body.
You will need to buy a set of new injector O rings when they go back in, the old ones are likely to leak if you re use them. Im told you can tell if the injectors are clogged by checking the plugs- as the fuel does not atomise correctly it enters the combustion chamber as larger fuel droplets, and this washes the carbon of one side if the plug central insulator, so you will see a noticeable shift in colour from one side to the other.Worth trying a couple of bottles of injector cleaner in the fuel before you rip it to bits, Ive seen the stuff work well.
griffdude said:
Just had a quote £107 inc return post for doing 8 vectra ones blitzracing said:
You will need to buy a set of new injector O rings when they go back in, the old ones are likely to leak if you re use them. Im told you can tell if the injectors are clogged by checking the plugs- as the fuel does not atomise correctly it enters the combustion chamber as larger fuel droplets, and this washes the carbon of one side if the plug central insulator, so you will see a noticeable shift in colour from one side to the other.Worth trying a couple of bottles of injector cleaner in the fuel before you rip it to bits, Ive seen the stuff work well.
Mark,Injectortune replaced the o rings when they clean them so its a full refurb package for the £110 ish cost.
FFG
I purchased an cheap ultrasonic cleaner and filled it full of carb' cleaner and popped them in to 20 mins (just the tips)- but this wont clean the insides as the injectors are closed- so you have to put a pulsed 12 volt supply onto the injector coil- the easiest way to do this is use a 12 volt transformer from an old battery charger and a single diode to half wave rectify the output- this will give you a 12 volt pulse- half on - half off- so the injector wont overheat, and a combination of moving the pintle and the ultrasonics cleans the whole spray area. Just dont use the plastic tray you get with the cleaner and carb cleaner as it desolves plastic.
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