Postby smj999smj » Thu May 23, 2019 12:34 am
As far as the injector cap retaining screws, I use an impact driver w/ a Phillips bit and carefully (since the base is aluminum) tap them loose.
You don't mention what year or engine you have, so I'll assume it's a VG30E since that's the most common engine for WD21 Pathfinders. Nissan used paint dots on the fuel injectors to identify them. If you are replacing less than six, than you are supposed to match the paint dot to get the correct injector; the paint dot identifies the spray pattern of the fuel injector. If you are replacing the whole set of injectors, then it doesn't really matter about the paint dot since you will be buying six of the same. It sounds like by your post you are replacing the full set of six.
My first bit of advice: be careful if you are looking for parts on Ebay! There are a lot of counterfeit injectors (among other auto parts) that look and are often sold as "OEM" fuel injectors. If the part cost is too good to be true, that's a good sign that "something's up." Another tip: make sure you lube the "O" rings before you install the fuel injector. A dab of clean motor oil will work, but I prefer to lube them with Vaseline (petroleum jelly).
Genuine Nissan injectors are expensive, at least the last time I checked. They are made by Hitachi. You can get Hitachi fuel injectors for around $50 each. On my 2003 Frontier (VG33ER engine), I installed a set of Autoline remanufactured fuel injectors 3-years ago and they've been fine. I got them using a 30% discount code at Advanced Auto Parts, ordering online (shipped to home) and returned the cores to the local store, which saved me shipping them back. I think I spend about $100 for the set, back then. Rockauto sells Autoline for $34 including the core, so, if you don't send back the cores, it's still a less expensive option AND they have a 2-year warranty (which is double that of the Hitachis). They also have AUS injectors for $25 on closeout; I've used AUS before and didn't experience any problems, but the warranty is only 90-days and my experience with Rockauto is that a many of their closeout items they sell is "old stock."