Injector coil nut
Thread Starter
|
Tuned
Joined: Jun 2006
Posts: 420
Likes: 4
Injector coil nut
Hey all, the truck developed a hard miss on cylinder 3. After further inspection the small 4mm nut that holds the coils on the injector had backed off (and lost) on cylinder 1 and 3. It doesn't look like I was one of the lucky ones to find it laying on top of the cylinder head. Now comes the question of where can I find some replacement nuts or even what size and pitch am I looking for? The injector re-build shops that I've been to just return blank stares when I ask them if they have a replacement. I know I can be the only one that has had to find these nuts. Thanks guys!
Logistics Pro
Joined: Jul 2014
Posts: 4,673
Likes: 532
From: Houston, Texas
You might get lucky at a local dismantler or pick-u-part yard. None of them will tell you over the phone/email though - they don't inventory that - so you'd have to buy the entire injector. But I can't think they get much for used injectors. Maybe someone here is about to replace theirs and can pull the nuts from the core they're returning.
Thread Starter
|
Tuned
Joined: Jun 2006
Posts: 420
Likes: 4
Well just to update this, nut in question turned out to be a M2.5 and are quite literally a dime a dozen from eBay coming over on the slow boat. Granted they're not exact flanged and staked replacements but I figure a dab of locktite and they should be ok. You guys in the States might have better luck with a closer replacement from McMaster Carr. Beats buying a new injector or robbing core's.
Tuned
Joined: Mar 2010
Posts: 286
Likes: 12
From: Central CA
You could also try Bitterroot Diesel. I know they carry lots of parts for these injectors. https://bitterrootdiesel.com/
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Go to your FRIENDLY local Ford parts person and ask if they can let you remove them from some cores.
Take beer or something in trade. They toss those parts out. I know a few guys that pull plugs off and save them
in the just in case box. You might also take some safety wire with you so they can stick it through the spool
valve and coil. That way your parts friend won't have small bitss rolling on the floor to step on.
Take beer or something in trade. They toss those parts out. I know a few guys that pull plugs off and save them
in the just in case box. You might also take some safety wire with you so they can stick it through the spool
valve and coil. That way your parts friend won't have small bitss rolling on the floor to step on.
Laughing Gas
Joined: Dec 2017
Posts: 846
Likes: 34
I have a feeling that the factory nut is a lock nut by the feel of it. What do you think?
I know lock tight would work well, it's just that I really don't like waiting for 24 hours later to test an installation, but got to do what we got to do right.
I know lock tight would work well, it's just that I really don't like waiting for 24 hours later to test an installation, but got to do what we got to do right.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Not so much a locknut as an anti-self loosening nut.
I can't recall the correct name right now. But it's basically a nyloc but made from metal.
I can't recall the correct name right now. But it's basically a nyloc but made from metal.
Trending Topics
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Fleet Owner
Joined: Nov 2003
Posts: 27,922
Likes: 3,640
Hey all, the truck developed a hard miss on cylinder 3. After further inspection the small 4mm nut that holds the coils on the injector had backed off (and lost) on cylinder 1 and 3. It doesn't look like I was one of the lucky ones to find it laying on top of the cylinder head. Now comes the question of where can I find some replacement nuts or even what size and pitch am I looking for? The injector re-build shops that I've been to just return blank stares when I ask them if they have a replacement. I know I can be the only one that has had to find these nuts. Thanks guys!
Thread Starter
|
Tuned
Joined: Jun 2006
Posts: 420
Likes: 4
Anyway, the point of this thread was to update the size of the nut really since all I could find on the internet was how many people have lost them but without a solution on a replacement. I agree that in a perfect world the original nuts shouldn't be used since they are distorted thread type nut, and once they're backed off and reinstalled it could be argued that they are not as effective (but what are you supposed to do if new ones aren't readily available?). Unfortunately when all this happened I was 3hrs away from home on the side of the hwy, so that little nut cost me quite a bit since I swapped one injector out with a Ford reman and wire tied the other to get me home. Needless to say my repair cost me 100x of what it should/could had but I was in a bind so what can you do? Hopefully this is info for the next guy that this happens to and can get back up and running for a lot less than I did.
Fleet Owner
Joined: Nov 2003
Posts: 27,922
Likes: 3,640
Your right, it is just a light touch when snugging these down....but I never did give a torque value in any of my posts either. Maybe you saw where I posted cylinders 1&3 and thought at a glance I was talking inch pounds?
Anyway, the point of this thread was to update the size of the nut really since all I could find on the internet was how many people have lost them but without a solution on a replacement. I agreed that in a perfect world the original nuts shouldn't be used since they are distorted thread type nut, and once they're backed off and reinstalled it could be argued that they are not as effective (but what are you supposed to do if new ones aren't readily available?). Unfortunately when all this happened I was 3hrs away from home on the side of the hwy, so that little nut cost me quite a bit since I swapped one injector out with a Ford reman and wire tied the other to get me home. Needless to say my repair cost me 100x of what it should/could had but I was in a bind so what can you do? Hopefully this is info for the next guy that this happens to and can get back up and running for a lot less than I did.
Anyway, the point of this thread was to update the size of the nut really since all I could find on the internet was how many people have lost them but without a solution on a replacement. I agreed that in a perfect world the original nuts shouldn't be used since they are distorted thread type nut, and once they're backed off and reinstalled it could be argued that they are not as effective (but what are you supposed to do if new ones aren't readily available?). Unfortunately when all this happened I was 3hrs away from home on the side of the hwy, so that little nut cost me quite a bit since I swapped one injector out with a Ford reman and wire tied the other to get me home. Needless to say my repair cost me 100x of what it should/could had but I was in a bind so what can you do? Hopefully this is info for the next guy that this happens to and can get back up and running for a lot less than I did.
Thread Starter
|
Tuned
Joined: Jun 2006
Posts: 420
Likes: 4
Very cool, thanks bismic. I think so also. I couldn't find a single thread or post on Google covering many different forums about what those little nuts were (size) or where to get a replacement.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Your right, it is just a light touch when snugging these down....but I never did give a torque value in any of my posts either. Maybe you saw where I posted cylinders 1&3 and thought at a glance I was talking inch pounds?
Anyway, the point of this thread was to update the size of the nut really since all I could find on the internet was how many people have lost them but without a solution on a replacement. I agree that in a perfect world the original nuts shouldn't be used since they are distorted thread type nut, and once they're backed off and reinstalled it could be argued that they are not as effective (but what are you supposed to do if new ones aren't readily available?). Unfortunately when all this happened I was 3hrs away from home on the side of the hwy, so that little nut cost me quite a bit since I swapped one injector out with a Ford reman and wire tied the other to get me home. Needless to say my repair cost me 100x of what it should/could had but I was in a bind so what can you do? Hopefully this is info for the next guy that this happens to and can get back up and running for a lot less than I did.
Anyway, the point of this thread was to update the size of the nut really since all I could find on the internet was how many people have lost them but without a solution on a replacement. I agree that in a perfect world the original nuts shouldn't be used since they are distorted thread type nut, and once they're backed off and reinstalled it could be argued that they are not as effective (but what are you supposed to do if new ones aren't readily available?). Unfortunately when all this happened I was 3hrs away from home on the side of the hwy, so that little nut cost me quite a bit since I swapped one injector out with a Ford reman and wire tied the other to get me home. Needless to say my repair cost me 100x of what it should/could had but I was in a bind so what can you do? Hopefully this is info for the next guy that this happens to and can get back up and running for a lot less than I did.
Hotshot
Joined: Dec 2014
Posts: 17,834
Likes: 3,122
From: Jersey Shore
Pete nailed it, it's a Collar Nut, a distorted thread nut, my understanding is it's rated for 5 installs/removal cycles. It's similar to Flex-Top nuts which are rated for a full15 installs/removal cycles.
The more used nylon lock loose effectiveness rapidly and while often stated they can be reused, try to find a manufacturer who will state how many times.
Loctite will work too, even NASA has a paper on using it.
The more used nylon lock loose effectiveness rapidly and while often stated they can be reused, try to find a manufacturer who will state how many times.
Loctite will work too, even NASA has a paper on using it.