How hard is it to change the o rings on the fuel injectors on a 1990 nissan stanza. I have about 2% of automotive know how..|||Don%26#039;t do it. It will be much cheaper to pay a mechanic to do it right the first time. This way you don%26#039;t have to pay a tow bill on top of the cost to have him replace them. It is generally not too hard but it in very critical to have everything perfect. Hope I have been helpful.|||The biggest problem is that the fuel system will probably still be under pressure. Having a mechanic handle things will be your safest bet.
But if you want to change them yourself, here%26#039;s what is likely to be involved.
1. Drain off the pressure in the fuel rail. There may be a valve for this.
2. Disconnect the fuel inlet and outlet lines from the fuel rail.
3. Remove the electrical connectors from the fuel injectors. This may require lifting out a little wire clip using a needle nose pliers.
4. Unscrew the fuel rail and lift it off.
5. The injectors can now be pulled out.
6. Remove the O-rings and put new ones on.
7. Reassemble in reverse order.
A repair manual such as the ones by Haynes will be a very big help here.
