I just bought some injectors for my 92 f-250 diesel, can anybody share their knowledge on how to install them. I searched on here a while back and thought I read on how to do it, said something about putting something on the o-rings?? Thanks in advance.

 

Ok to install the injectors is pretty straight forward.

First get your new injectors prepped.

Install the orings on the new injectors, I grease them lightly then take care to not cut them on the threads. Install the top oring first, then the bottom oring. This is because as you slide the first oring on it will fall into the place, then the second one will slide over the first to find it's home below.

Now your ready to pull the injector lines off the injector, take care not to bend them around more than you really need. then pull the return line caps off. I prefer to do this per side, as in I loosen all the return caps on the drivers side then leaving the short pieces of hose between the caps I pull them off as one unit. I like to replace the return caps as well during this maintenance, this is because over time they will become distorted and could leak on you after you go thru all this.

Now when you remove the injectors there is a copper washer that seals between the injector and head. Make sure this comes out with the old injector.

Now your ready to install the new injectors. Just slip the copper sealing washer on the new injector if it does not want to stay I use just a hint of grease to hold it in place. Coat the threads of the injector with anti-sieze. Remember a little goes a long way with this stuff. Then take care while inserting the injector. Because you don't want to knock the spray nozzle against anything as this will effect your spray pattern, and you could be back where you started. The proper torque for the injectors is 35ft-lbs.

Now install your return line caps and lines. When installing the return line caps they will seat in place with a final snap. I normally take a deep well socket and either tap it with a small hammer or just use the socket so you have better leverage. You will feel them seat into place.

Then install the metal lines from the injector pump. The proper torque here is 22 ft-lbs.

Now I don't check the torque of anything during this procedure, I just snug them up good and call it a day and have never had a problem.

Now since you have had the fuel system open don't be surprise if she is hard to start, because you have introduced air into the system. If she happens to air lock on you loosen all the fuel lines at the injectors a smidge and have someone crank the engine over and tighten them up in the sequence of 2-7-1-3-8-4-6-5 to properly bleed the air from the system. But I have never had them air lock before on me when just changing the injectors. So I would not be too concerned with this. I just mentioned it because some have her air lock after performing this maintenance.

This should get you back on the road with a smile on your face.

 

thanks for the info, I'll print this and take it to my garage to follow. thanks