the_tool_man Posted March 17, 2016 Author Share #109 Posted March 17, 2016 (edited) I got the rest of the fuel rail and injectors out last night. What a pain. Injector retaining screws are JIS B1111 Phillips recess pan head screws, M5x0.8, 30mm long. I hadn't seen that documented anywhere. McMaster Carr has them in zinc plated steel (94387A338). They have them in stainless, too. But I'll stick with OEM finish, as I'd rather the screws corrode than the intake manifold. Thankfully, the two screws stuck badly enough to wring off their heads are on #5 and #6, where access is better and heat is safer. The one I drilled is on #1. Hopefully, it'll come out easier than the others, since it's still partially buried under FI harness. We'll find out tonight. Edited March 17, 2016 by the_tool_man Link to comment Share on other sites More sharing options...
siteunseen Posted March 17, 2016 Share #110 Posted March 17, 2016 Definitely replace the screws with the newer hex head type. I got mine at my Nissan dealership, you'll see the part number in this thread. S30Driver found some allen head type too, maybe Fastenal would have those? Link to comment Share on other sites More sharing options...
the_tool_man Posted March 17, 2016 Author Share #111 Posted March 17, 2016 10 minutes ago, siteunseen said: Definitely replace the screws with the newer hex head type. I got mine at my Nissan dealership, you'll see the part number in this thread. S30Driver found some allen head type too, maybe Fastenal would have those? I order everything from McMaster Carr when I can. Their online catalog is one of the most comprehensive on the planet. Their prices are a bit higher. But you have to remember that it includes overnight shipping. I considered using hex socket head screws. And I may switch later. Right now, I'm unsure whether to keep this car original or mod it. My normal inclination is to mod it, as I've done my other cars. But this thing is such a time capsule, I'm hesitant. So for now, I'm replacing with identical. I'm probably overthinking this. But that's what I do. BTW, I don't think hex head screws would allow room for a socket, because the heads are pretty close to the injector body. Again, I'd recommend against stainless for these. The primary reason is that they are somewhat weaker than steel, and more likely to wring off or strip the head. A second reason is that they screw into aluminum. There exists a likelihood that there will be galvanic action between the parts. If you look at the galvanic series, zinc is very close to aluminum, minimizing the electrical potential for corrosion. Stainless steel is much farther away from aluminum, and more cathodic as well. This means the aluminum will corrode, albeit very slowly due to the mass ratio. Link to comment Share on other sites More sharing options...
wheee! Posted March 17, 2016 Share #112 Posted March 17, 2016 That was part of the reason I decided to switch to the 11mm oring style injectors with a pallnet rail..., no more need for the retaining screws or clamps. Link to comment Share on other sites More sharing options...
siteunseen Posted March 17, 2016 Share #113 Posted March 17, 2016 When I went to Nissan to get replacements the parts guy said they quit making the round phillips head, superseded the newer part number. That's how I ended up with hex heads. Link to comment Share on other sites More sharing options...
the_tool_man Posted March 17, 2016 Author Share #114 Posted March 17, 2016 If I mod this thing, I may try the Pallnet rail, as well. I really like how that cleans things up. Then again, I might just go with an aftermarket system altogether. But that's later. Link to comment Share on other sites More sharing options...
the_tool_man Posted March 17, 2016 Author Share #115 Posted March 17, 2016 Do the injectors not come with O-rings? I thought those were included. But I haven't looked. Thanks for the heads up, siteunseen. Link to comment Share on other sites More sharing options...
Zed Head Posted March 17, 2016 Share #116 Posted March 17, 2016 With today's fuel and the fact that you live in a hot part of the country you'll probably experience some hot-start issues if you keep the stock system. A few of those and the "time capsule" nature of the car will become much less relevant. I like to experience the real problem myself, so maybe wait and see but be ready to work fast. Link to comment Share on other sites More sharing options...
S30Driver Posted March 17, 2016 Share #117 Posted March 17, 2016 2 hours ago, the_tool_man said: Do the injectors not come with O-rings? I thought those were included. But I haven't looked. Thanks for the heads up, siteunseen. If you were referring to Wheee's post referring to an O-ringed rail, the Pallnet rail can be either the barbed (stock) or O-ring style to mate to the fuel rail. The new injectors will come with the seals for the intake manifold. 1 Link to comment Share on other sites More sharing options...
the_tool_man Posted March 18, 2016 Author Share #118 Posted March 18, 2016 Yeah. I should've looked at one before posting. O-rings are included. Link to comment Share on other sites More sharing options...
siteunseen Posted March 18, 2016 Share #119 Posted March 18, 2016 They're not really o-rings. Just rubber shaped like zeroes. You'll get the big one for the body and smaller one for the tip. FWIW Plus a solid clamp, fj707t. Those have a different spray nozzle that I think is better. No small pin hole like the others. My $.02 cents only. Link to comment Share on other sites More sharing options...
the_tool_man Posted March 18, 2016 Author Share #120 Posted March 18, 2016 True. But it's easer to type O-ring than "square-sectioned circular rubber gasket", lol. 2 Link to comment Share on other sites More sharing options...
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