1995 Olds Aurora , 4.0 litre V8, needs at least some, if not all injectors replaced. Once plenum is removed, the injectors sit right on the top of the engine and are really easy to access (the only thing on this car easy to get to). Is there a trick to changing these things out, or is it a straight forward job that anyone with a little mechanical ability could do? Do they need to be tightened with a specific torque spec?
Fuel Injector(s) change?
1. clean the injectors surrounding .
2.mark the fuel pipe lines otherwise if any change happen it will change the firing order and the engine will not start.
3.unscrew and remove the injectors and don't lose the injectors' seals
4.put suitable piece of cloth in the injectors openings to prevent any thing to fall inside the cylinders.
5.re-clean the area around the injectors
6.repair injectors.
7.remove these piece of cloth, put the seals and tighten the injectors in their place
8. tightening should good but with mechanical sense ie.not too hard otherwise the bolts would be destroyed
9. start your engine and check with your hands for any gas sealing around injectors (if so just tighten again that injector
SO IT IS JUST STRAIGHT FORWARD JOB AND NO NEED FOR A TORQUE SPEC
Fuel Injector(s) change?
The easiest thing to do is get a shop manual buy or library to do it right. Some need you to release the pressure by removing the gas cap and add a jumper or remove a relay and run it dry than remove it . put new O-ring rub some oil to it (on the o-ring)and on the nut/bolt add blue thread lock 7-10 or ? ft. per lbs to play it safe look in the book thats all you need to do is retap a broken thread or stud even crack the intake Right? for being to tight or loose and cause a fire.
It's easy. Just make sure you use new seals, check the flexi fuel lines for condition and evacuate the residual fuel pressure before opening any lines. Use proper high pressure fuel line if you need to replace.
Jules, auto tech and lecturer. Australia.
jeez... boring question 2 points.
