I am going from 370s to 740s on my lowport. Two of the screws are stripping; this is the worst engineering move on Nissan's part I have ever seen. Why the hell would they use phillips head screws. I have tried getting at it from the side with needle-nose vise-grips without luck. The head material just strips off. I have unbolted just enough of the intake manifold to set the collector up out of the way without tearing it all apart. Does anyone have any other ideas? The height a tool can be over the screw is limited. Any tricks would be appreciated...

I am going from 370s to 740s on my lowport. Two of the screws are stripping; this is the worst engineering move on Nissan's part I have ever seen. Why the hell would they use phillips head screws. I have tried getting at it from the side with needle-nose vise-grips without luck. The head material just strips off. I have unbolted just enough of the intake manifold to set the collector up out of the way without tearing it all apart. Does anyone have any other ideas? The height a tool can be over the screw is limited. Any tricks would be appreciated...


Take the rail out, and file down the screw until you can use a flathead. Otherwise, vise grips and some PB Blaster are your friends :) Of course, you need to replace them with allen head bolts like most do. Will save you the pain and suffering later on, should you decide to remove/replace injectors.

You need vise grips to loosen them. I feel your pain though as I just recently swapped injectors. They suck donkey ballz!

Take the rail out, and file down the screw until you can use a flathead. Otherwise, vise grips and some PB Blaster are your friends :) Of course, you need to replace them with allen head bolts like most do. Will save you the pain and suffering later on, should you decide to remove/replace injectors.

Anyone know the exact specs on the bolts to replace with hex heads? BTW, I got one out. The last one is on the far right, and there is very little room to work on it.

I think it's a M6 allen head bolt. (not hex head). Just take the bolt you took out to Home Depot Racing, and size it up.

http://www.sr20forum.com/general-sr20/214047-allen-head-injector-cap-screws.html

a pair of regular vise grips will work just fine, get them tight and they will break loose easily. needle nose vise grips wont grab it good enough and just strip it. get as big and bulky of a pair that you can get in there with the flat ends and just get it as tight as possible.

I had this same problem when I switched to 555cc injectors. I found that if you reomve the rail and use a dremel to make a flat suface for vise grips they come right out. make sure to use anti seize on threads of what ever you use to bolt the injectors with. I would also go with a allen cap screw just in case.